Surgery for Anomalies of the Müllerian Ducts



Surgery for Anomalies of the Müllerian Ducts


Lesley L. Breech

John A. Rock





CLASSIFICATION OF UTEROVAGINAL ANOMALIES

Classifications of uterovaginal anomalies originally were organized on the basis of clinical findings. Our improved understanding of the embryologic development of most uterovaginal anomalies has enabled categorization on this basis. The 1988 American Fertility Society (AFS) classification of müllerian anomalies (Table 25.1) offers an alternative based on the degree of failure of normal uterine development. Anomalies are grouped according to similarities of clinical manifestations, treatment, and prognosis for fetal salvage. The AFS classification system is weighted primarily toward disorders of lateral fusion and does not include associated vaginal anomalies, although the scheme does allow the user to describe anomalies involving the vagina, tubes, and urinary tract as associated malformations.

No classification of müllerian maldevelopment can focus entirely on the uterus; the vagina is often involved, and sometimes the tubes are involved as well. This discussion follows a suggested modification of the AFS classification of uterovaginal anomalies (Table 25.2) that comprises four groups based on embryologic considerations.








TABLE 25.1 American Fertility Society Classification of Müllerian Anomaliesa


























































Class I. Segmental, müllerian agenesis-hypoplasia



A. Vaginal



B. Cervical



C. Fundal



D. Tubal



E. Combined anomalies


Class II. Unicornuate



A. Communicating



B. Noncommunicating



C. No cavity



D. No horn


Class III. Didelphys


Class IV. Bicornuate



A. Complete (division down to internal os)



B. Partial


Class V. Septate



A. Complete (septum to internal os)



B. Partial


Class VI. Arcuate


Class VII. Diethylstilbestrol related


aThis classification allows the user to indicate the malformation type and provides additional findings to describe associated variations involving the vagina, cervix, tubes (right, left), and kidneys (right, left).


Adapted from the American Fertility Society. The American Fertility Society classifications of adnexal adhesions, distal tubal occlusion, tubal occlusion secondary to tubal ligation, tubal pregnancies, müllerian anomalies and intrauterine adhesions. Fertil Steril 1988;49:944, with permission. Copyright © 1988, Elsevier.










TABLE 25.2 American Fertility Society Classification of Uterovaginal Anomalies





















































































































































































































































Class I. Dysgenesis of the müllerian ducts


Class II. Disorders of vertical fusion of the müllerian ducts



A.


Transverse vaginal septum




1.


Obstructed




2.


Unobstructed



B.


Cervical agenesis or dysgenesis


Class III. Disorders of lateral fusion of the müllerian ducts



A.


Asymmetric-obstructed disorder of uterus or vagina usually associated with ipsilateral renal agenesis




1.


Unicornuate uterus with a noncommunicating rudimentary anlage or horn




2.


Unilateral obstruction of a cavity of a double uterus




3.


Unilateral vaginal obstruction associated with double uterus



B.


Symmetric-unobstructed




1.


Didelphic uterus





a.


Complete longitudinal vaginal septum





b.


Partial longitudinal vaginal septum





c.


No longitudinal vaginal septum




2.


Septate uterus





a.


Complete






1)


Complete longitudinal vaginal septum






2)


Partial longitudinal vaginal septum






3)


No longitudinal vaginal septum





b.


Partial






1)


Complete longitudinal vaginal septum






2)


Partial longitudinal vaginal septum






3)


No longitudinal vaginal septum




3.


Bicornuate uterus





a.


Complete






1)


Complete longitudinal vaginal septum






2)


Partial longitudinal vaginal septum






3)


No longitudinal vaginal septum





b.


Partial






1)


Complete longitudinal vaginal septum






2)


Partial longitudinal vaginal septum






3)


No longitudinal vaginal septum




4.


T-shaped uterine cavity (diethylstilbestrol related)




5.


Unicornuate uterus





a.


With a rudimentary horn






1)


With endometrial cavity







a) Communicating







b) Noncommunicating






2)


Without endometrial cavity





b.


Without a rudimentary horn


Class IV. Unusual configurations of vertical-lateral fusion defects


Modified from the American Fertility Society. The American Fertility Society classifications of adnexal adhesions, distal tubal occlusion, tubal occlusion secondary to tubal ligation, tubal pregnancies, müllerian anomalies and intrauterine adhesions. Fertil Steril 1988;49:944.



Class I: Dysgenesis of the Müllerian Ducts

Dysgenesis of the müllerian ducts, which includes agenesis of the uterus and vagina (the Mayer-Rokitansky-Küster-Hauser [MRKH] syndrome), is an impairment of the reproductive system characterized by no reproductive potential other than that achieved by in vitro fertilization in a host uterus.


Class II: Disorders of Vertical Fusion of the Müllerian Ducts

Disorders of vertical fusion can be considered to represent faults in the junction between the downgrowing müllerian ducts (müllerian tubercle) and the upgrowing derivative of the urogenital sinus. Typically, these disorders are characterized by an atretic portion of the vagina that can be quite thick, extending through more than half the distance of the vagina, or it can be quite thin and limited to a small obstructing membrane.

Regardless of the length of the septum, a disorder of vertical fusion should be regarded as a transverse vaginal septum and classified as either obstructed or unobstructed. The socalled partial vaginal agenesis with uterus and cervix present is probably a misnomer for a large segment of atretic vagina. Cervical agenesis or dysgenesis is also included in the group of disorders of vertical fusion.


Class III: Disorders of Lateral Fusion of the Müllerian Ducts

Disorders of lateral fusion of the two müllerian ducts can be symmetric-unobstructed, as with the double vagina, or asymmetric-obstructed, as with unilateral vaginal obstruction. Obstructions associated with disorders of lateral fusion are particularly noteworthy in that they are observed clinically only as unilateral obstructions that almost invariably are associated with absence of the ipsilateral kidney. Bilateral obstruction is thought to be associated with bilateral kidney agenesis and subsequent nonviability of the developing embryo.

The three varieties of asymmetric obstruction with ipsilateral renal agenesis are:



  • Unicornuate uterus with a noncommunicating horn that contains menstruating endometrium


  • Unilateral obstruction of a cavity of a double uterus


  • Unilateral vaginal obstruction

The five groups of symmetric-unobstructed disorders of lateral fusion are:



  • The didelphic uterus


  • The septate uterus


  • The bicornuate uterus


  • The T-shaped uterine cavity, which may be hypoplastic and irregular and which is associated with diethylstilbestrol (DES) exposure in utero


  • The unicornuate uterus with or without a rudimentary horn

The first three groups are types of double uteri; differentiation between a septate uterus (second group) and a bicornuate uterus (third group) requires visualization of the fundus. The septum within the septate uterus is complete or partial. When the septum is complete, that inevitably involves the cervical region with a longitudinal vaginal septum that can extend to the introitus or partially down the vagina. The bicornuate uterus also can have a partial or almost complete separation of the uterine cavities. The term arcuate uterus is used primarily by radiologists to refer to a slight septum in the uterine fundus that forms no clear separation of the uterine cavities. This type of uterus is usually included in the category of partial septate uterus.

The unicornuate uterus may have an attached horn with a cavity that communicates with the unicornuate uterus, or there may be no uterine horn or a uterine horn with no cavity.
Some debate has focused on whether the unicornuate uterus with a communicating horn can represent a hypoplastic side of a bicornuate uterus.


Class IV: Unusual Configurations of Vertical-Lateral Fusion Defects

This final category includes combinations of uterovaginal anomalies and other disorders. Unusual uterovaginal configurations have been described that do not fit a particular category, and vertical and lateral fusion disorders can coexist.

Unusual configurations of vertical-lateral fusion defects can be seen with abnormalities of the lower urinary tract. Singh and coworkers have described a patient who was noted to have a persistent hymen and a longitudinal vaginal septum with a didelphic uterus. The patient was noted also to have a double urethra and bladder and left renal agenesis.

Obstructive lesions require immediate attention to relieve retrograde flow of trapped mucus and menstrual blood and increasing pressure on surrounding organs and structures. When no obstruction is present, attention may not be required immediately, but it will always be required eventually to establish or improve reproductive or coital function.


EMBRYOLOGY

The reproductive organs in the female (and in the male) consist of external genitalia, gonads, and an internal duct system between the two. These three components originate embryologically from different primordia and in close association with the urinary system and hindgut. Thus, the developmental history is complex (Figs. 25.1 and 25.2). Even in the 3.5- to 4-mm embryo, it is possible to recognize the bilateral thickenings of the coelomic epithelium known as the gonadal ridges medial to the mesonephros (primitive kidney) in the dorsum of the coelomic cavity. At approximately the 6th week of gestation, in the 17- to 20-mm embryo, the gonad can be distinguished as either a testis or an ovary.

In the female, the labia minora and majora develop from the labioscrotal folds, which are ectodermal in origin. The phallic portion of the urogenital sinus gives rise to the urethra. The müllerian (paramesonephric) duct system is stimulated to develop preferentially over the wolffian (mesonephric) duct system, which regresses in early female fetal life. The cranial parts of the wolffian ducts can persist as the epoöphoron of the ovarian hilum; the caudal parts can persist as Gartner ducts. The müllerian ducts persist and attain complete development to form the fallopian tubes, the uterine corpus and cervix, and a portion of the vagina.


Origin of the Müllerian Ducts

Approximately 37 days after fertilization, the müllerian ducts first appear lateral to each wolffian duct as invaginations of the dorsal coelomic epithelium. The site of origin of the invaginations remains open and ultimately forms the fimbriated ends of the fallopian tubes. At their point of origin, each of the müllerian ducts forms a solid bud. Each bud penetrates the mesenchyme lateral and parallel to each wolffian duct. As the solid buds elongate, a lumen appears in the cranial part, beginning at each coelomic opening. The lumina extend gradually to the caudal growing tips of the ducts.

Eventually, the caudal end of each müllerian duct crosses the ventral aspect of the wolffian duct. The paired müllerian ducts continue to grow in a medial and caudal direction until they eventually meet in the midline and become fused together in the urogenital septum. A septum between the two müllerian ducts gradually disappears, leaving a single uterovaginal canal lined with cuboidal epithelium. Failure of reabsorption of this septum can result in a septate uterus. The most cranial parts of the müllerian ducts remain separate and form the fallopian tubes. The caudal segments of the müllerian ducts fuse to form the uterus and part of the vagina. The cranial point of fusion is the site of the future fundus of the uterus. Variations in this site of fusion can result in an arcuate or bicornuate uterus. Complete failure of fusion can result in a didelphic uterus.

Isolated case reports continue to challenge established embryologic mechanisms of müllerian development. Dunn and Hantes reported a case of a double cervix and vagina with a blind cervical pouch challenging the theory of unidirectional fusion. Engmann and colleagues reported a unicornuate uterus with normal external uterine morphology, with bilateral fallopian tubes; however, only the right fallopian tube communicated with the uterine cavity. The patient suffered from pain because of the obstruction egress of the stimulated endometrial tissue. The patient was treated with removal of the obstructed cavity. The authors propose that this may represent failure of canalization of one of the müllerian ducts. Additional reports are necessary to fully evaluate potential variations in embryologic development.


Development of the Vagina

The vagina is formed from the lower end of the uterovaginal canal, which developed from the müllerian ducts and the urogenital sinus (Fig. 25.2). The point of contact between the two is the müllerian tubercle. A solid vaginal cord results from proliferation of the cells at the caudal tip of the fused müllerian ducts. The cord gradually elongates to meet the bilateral endodermal evaginations (sinovaginal bulbs) from the posterior aspect of the urogenital sinus below. These sinovaginal bulbs extend cranially to fuse with the caudal end of the vaginal cord, forming the vaginal plate. Subsequent canalization of the vaginal cord occurs, followed by epithelialization with cells derived mostly from endoderm of the urogenital sinus. Recent proposals hold that only the upper one third of the vagina is formed from the müllerian ducts and that the lower vagina develops from the vaginal plate of the urogenital sinus. Recent studies also suggest that the vaginal canal is actually open and connected to a patent uterus and tubes, even in early embryonic life, and that the vagina does not form and later become canalized from an epithelial cord of squamous cells growing upward from the urogenital sinus. Most investigators now suggest that the vagina develops under the influence of the müllerian ducts and estrogenic stimulation. There is general agreement that the vagina is a composite formed partly from the müllerian ducts and partly from the urogenital sinus.

At approximately the 20th week, the cervix takes form as a result of condensation of stromal cells at a specific site around the fused müllerian ducts. The mesenchyme surrounding the müllerian ducts becomes condensed early in embryonic development and eventually forms the musculature of the female genital tract. The hymen is the embryologic septum between the sinovaginal bulbs above and the urogenital sinus proper below. It is lined by an internal layer of vaginal epithelium and an external layer of epithelium derived from the urogenital sinus (both of endodermal origin), with mesoderm between the two. It is not derived from the müllerian ducts.


Anomalies in Organogenesis of the Vagina

Anomalies in the organogenesis of the vagina are easily understood. If there is failure in the development of the müllerian
ducts at any time between their origin from the coelomic epithelium at 5 weeks of embryonic age and their fusion with the urogenital sinus at 8 weeks, the sinovaginal bulbs will fail to proliferate from the urogenital sinus, and the uterus and vagina will fail to develop. Congenital absence of the uterus and the vagina, known as the MRKH syndrome, is the most common clinical example of this anomaly.






FIGURE 25.1 Diagrammatic representation of the development of the female reproductive organs and structures in early embryogenesis. A: At the 18- to 20-somite stage (4th week), the gonadal ridges have not yet begun to form. B: In the 3.5- to 4-mm embryo (5th week), the gonadal ridges can be recognized as thickenings of the coelomic cavity just medial to the mesonephric tubules. (Gonadal differentiation into either testis or ovary does not occur until the 6th week of development.) The allantoenteric diverticulum is joined caudally to the dilated cloaca. C and D: The genital tubercle and labial folds form in the region just anterior to the cloaca. The cloaca later divides into the ventral urogenital sinus and the dorsal rectum. The development of the urinary system closely parallels that of the reproductive system. The nonfunctioning pronephric tubules shown in (A) develop to form the mesonephric ducts shown in (B) and (C). The permanent kidneys eventually develop from the metanephric tissue, and the urinary collecting system develops from the metanephric ducts. The paramesonephric (müllerian) ducts are apparent by the 12- to 14-mm stage (D). (Their subsequent development is illustrated in Figure 25.2.)


Transverse Vaginal Septum

A transverse vaginal septum can develop at any location in the vagina but is more common in the upper vagina at the point of junction between the vaginal plate and the caudal end of the fused müllerian ducts. This defect presumably is caused by failure of absorption of the tissue that separates the two or by
failure of complete fusion of the two embryologic components of the vagina. A large segment of vagina can be atretic. In past reviews, this has been termed partial vaginal agenesis with a uterus present. Elucidation of the cause of a high transverse vaginal septum is more difficult. A local abnormality of the vaginal mesoderm or failure of canalization of the epithelial vaginal plate can provide the answer, but why the abnormality should occur at this particular site is not evident. The proportion of the vagina originating from the urogenital sinus can at times be considerably more than one fifth, and a high transverse vaginal septum thus may represent the junction of an abnormally long urogenital sinus contribution and a short müllerian portion.
Alternatively, the high transverse septum could be the sequela of a local infection of the septum at the end of the vagina. Septa in other areas of the vagina are unexplained by this theory, which has not gained widespread acceptance.






FIGURE 25.2 Further development of the paramesonephric (müllerian) ducts and the urogenital sinus. A: Early development of the paramesonephric ducts. The cranial ends of the paramesonephric ducts develop first. These ends remain open to form the fimbriated ends of the fallopian tubes. The paramesonephric ducts grow caudally and cross the mesonephric ducts ventrally. B: Eventually, they fuse together to form the uterovaginal canal. C: Further caudal development brings this structure into contact with the wall of the urogenital sinus, producing the müllerian tubercle. The caudal ends of the fused paramesonephric ducts form the uterine corpus and cervix. Together with the urogenital sinus, they also form the vagina. The cranial point of fusion of the paramesonephric ducts marks the location of the future uterine fundus. The fallopian tubes form from the unfused cranial parts of the paramesonephric (müllerian) ducts. The proliferation of the lining of the uterovaginal canal above the upward growth of the sinovaginal bulb from below (D) forms the vaginal plate (E), which later becomes canalized to leave an open vaginal canal. Thus, the vagina is of composite origin. The mesonephric ducts in the female degenerate but can persist into adult life as Gartner ducts.


Disorders of Ineffective Suppression of Müllerian Ducts

When abnormal gonadal development is caused by ineffective suppression of the müllerian ducts, ambiguous external genitalia frequently are accompanied by a small rudimentary uterus or a partially developed vagina. Additionally, when there is a genetic loss of cytoplasmic receptor proteins within androgenic target cells, such as occurs in the androgen insensitivity syndrome (formerly called testicular feminization syndrome), the vagina is incompletely developed because the existing male gonads suppress the development of the müllerian ducts. Because these genetically XY patients have phenotypic female genital anatomy without a completely formed vagina, it is important that a vagina be nonsurgically (dilatation) or surgically created to ensure a satisfactory sexual experience.

Congenital anorectal malformations (imperforate anus with rectoperineal or rectovestibular fistula or more complex anomalies like cloaca or cloacal exstrophy) have been reported to occur with reproductive anomalies. These anomalies can be associated with maldevelopment of the müllerian and mesonephric duct derivatives.


Müllerian Duct Abnormalities

Abnormalities in the formation or fusion of the müllerian ducts can result in a variety of anomalies of the uterus and vagina: single, multiple, combined, or separate. Just as the entirely separate origin of the ovaries from the gonadal ridges accounts for the infrequent association of uterovaginal anomalies with ovarian anomalies (see this chapter), so do the close developmental relationships of the müllerian and wolffian ducts explain the frequency with which anomalies of the female genital system and urinary tract are associated. Failure of development of a müllerian duct is likewise associated with failure of development of a ureteric bud from the caudal end of the wolffian duct. Thus, the entire kidney can be absent on the side ipsilateral to the agenesis of a müllerian duct.

Depending on the timing of the teratogenic influence, renal units can be absent, fused, or in unusual locations in the pelvis. Ureters can be duplicated or can open in unusual places, such as the vagina or uterus. Jones and Rock have noted that failure of lateral fusion of the müllerian ducts with unilateral obstruction is associated consistently with absence of the kidney on the side with obstruction. Bilateral obstruction has not been observed clinically, presumably because it would be associated with bilateral renal agenesis, a condition that would not allow the embryo to develop. According to Thompson and Lynn, 40% of female patients with congenital absence of the kidney are found to have associated genital anomalies.

Much investigation has been undertaken to determine a genetic relationship in the development of disorders of the müllerian ducts. Familial aggregates of the most common disorders of the müllerian differentiation are best explained on the basis of polygenic or multifactorial inheritance. No information exists on the number and chromosomal location of responsible genes. Single mutant genes are responsible for the McKusick-Kaufman syndrome and the hand-foot-genital syndrome. Hand-foot-genital syndrome is a rare, dominantly inherited condition that affects both the distal limbs and the genitourinary tract. A nonsense mutation of the HOXA13 gene has been identified in several families. HOX gene mutations have been reported in several families with multiple müllerian abnormalities. Genital malformations may also be associated with heterozygous DNA sequence variations of the HOXA10, HOXA11, and HOXA13 genes. To date, involvement of the Y chromosome in the pathogenesis of müllerian anomalies has not been considered. The 2004 report by Plevraki and colleagues suggests the possible role of testis-specific protein 1-Y gene in patients with uni- or bilateral gonadal agenesis and uterovaginal dysgenesis. Timmreck and colleagues narrowed the genetic considerations by noting that in an evaluation of 40 women with developmental abnormalities of the uterus and vagina and 12 normal controls, no mutations of the WNT7A gene—a gene associated with murine Müllerian duct development—were found. Reproductive abnormalities involving the uterus and vagina may also be associated with other more complex malformation syndromes in which the molecular basis of many of the syndromes remains unknown.


CONGENITAL ABSENCE OF THE MÜLLERIAN DUCTS

The disorders of müllerian agenesis include congenital absence of the vagina and uterus. Often referred to in the literature simply as congenital absence of the vagina (vaginal agenesis), this condition is more accurately labeled aplasia (or dysplasia) of the müllerian ducts because the lower vagina generally is normal, but the middle and upper two thirds are missing. Despite the absence of the uterus, rudimentary uterine primordia are found that are comparable to each other in size and appearance. Tubes and ovaries in patients with congenital absence of the müllerian ducts generally are normal. The syndrome, usually referred to as the MRKH syndrome, is associated with a heterogeneous group of disorders that have a variety of genetic, endocrine, and metabolic manifestations and associated anomalies of other body systems.


Characteristics of Women with Müllerian Agenesis



  • Congenital absence of the uterus and vagina (small rudimentary uterine bulbs are usually present with rudimentary fallopian tubes)


  • Normal ovarian function, including ovulation


  • Sex of rearing: female


  • Phenotypic sex: female (normal development of breasts, body proportions, hair distribution, and external genitalia)


  • Genetic sex: female (46,XX karyotype)


  • Frequent association of other congenital anomalies (skeletal, urologic, and especially renal)

Partial agenesis of the vagina with the uterus present and a transverse vaginal septum both are categorized as disorders of vertical fusion. These two disorders have a low incidence of associated urinary tract anomalies, another circumstance that sets them apart from the MRKH syndrome.

Realdus Columbus first described congenital absence of the vagina in 1559. In 1829, Mayer described congenital absence of the vagina as one of the abnormalities found in stillborn infants with multiple birth defects. Rokitansky in 1838 and Küster in 1910 described an entity in which the vagina was absent, a small bipartite uterus was present, the ovaries were normal, and anomalies of other organ systems (renal and skeletal) were frequently observed. Hauser and associates emphasized the spectrum of associated anomalies. Pinsky suggested that congenital absence of the vagina is part of a symptom
complex and not a true syndrome. Over the years, the disorder has come to be known as the MRKH syndrome, the Rokitansky-Küster-Hauser syndrome, or simply the Rokitansky syndrome (Fig. 25.3). Counseller found that the condition occurred once in 4,000 female admissions to the Mayo Clinic. Evans estimated that vaginal agenesis occurred once in 10,588 female births in Michigan from 1953 to 1957.






FIGURE 25.3 Typical findings in a patient with MRKH syndrome. Note the absence of the right kidney and right ureteral orifice. The uterus is represented by bilateral rudimentary uterine bulbs joined by a band behind the bladder. The ovaries appear normal although there is malposition of the right ovary.

Individuals with an absent vagina and the classic MRKH syndrome usually are first seen by a gynecologist at age 14 to 15 years, when the absence of menses causes concern. Such young women have a normal complement of chromosomes (46,XX) and usually have normal ovaries and secondary sex characteristics, including external genitalia. Menstruation does not appear at the usual age because the uterus is absent, but ovulation occurs regularly. There are some exceptions to the rule of normal ovaries. For example, polycystic ovaries and gonadal dysgenesis have been reported in patients with congenital absence of the vagina. Plevraki and colleagues reinforced the importance of consideration of such conditions, as one of the six women with MRKH evaluated over a 12-month period demonstrated hypergonadotropic hypogonadism that was due to the bilateral absence of gonadal tissue. Additionally, nested polymerase chain reaction demonstrated the presence of testisspecific protein 1-Y-linked (TSPY) gene in two women.


Etiologic Factors

An exclusively genetic etiology cannot be ascribed to vaginal agenesis because almost all patients have a normal karyotype (46,XX) and because the discordance of vaginal agenesis in three sets of monozygotic twins has been reported. The occurrence of complete vaginal agenesis in sisters with a 46,XX karyotype suggests an autosomal mode of inheritance for these patients. Shokeir investigated the families of 13 unrelated females with aplasia of müllerian duct derivatives. Similarly affected females were found in 10 families. Usually, there was an affected female paternal relative, suggesting female-limited autosomal dominant inheritance of a mutant gene transmitted by male relatives.

Other investigators point to the variety of associated anomalies as support for the etiologic concept of variable expression of a genetic defect possibly precipitated by teratogenic exposure between the 37th and the 41st gestational day, the time during which the vagina is formed. Knab has suggested five possible etiologic factors of the MRKH syndrome:



  • Inappropriate production of müllerian regressive factor in the female embryonic gonad


  • Regional absence or deficiency of estrogen receptors limited to the lower müllerian duct



  • Arrest of müllerian duct development by a teratogenic agent


  • Mesenchymal inductive defect


  • Sporadic gene mutation

Knab believes that the teratogenic and the mutant gene etiologies are the most probable.


Anomalies Associated with Müllerian Agenesis

Many patients with müllerian agenesis have associated anomalies of the upper müllerian duct system together with associated anomalies of other organ systems. By gentle rectal examination, the physician can feel an absence of the midline müllerian structure that should represent the uterus. The physician instead feels a smooth band (possibly a remnant of the uterosacral ligaments) that extends from one side of the pelvis to the other. In MRKH syndrome, the uterus is represented by bilateral rudimentary uterine bulbs that vary in size, are not usually palpable, are connected to small fallopian tubes, and are located on the lateral pelvic side wall adjacent to normal ovaries. Depending on their size, these rudimentary uterine bulbs may or may not contain a cavity lined by endometrial tissue (Fig. 25.4). If present, the endometrial tissue can appear immature or, rarely, can show evidence of cyclic response to ovarian hormones. The endometrial cavity does not communicate often with the peritoneal cavity because the tube may not be patent at the point of junction between the tube and the rudimentary uterine bulb. In rare instances, however, active endometrium can exist within the uterine anlagen and the endometrial cavity, enabling communication with the peritoneal cavity through patent fallopian tubes. Reports have described several patients with functioning endometrial tissue in one or both rudimentary uterine bulbs (Fig. 25.4B). The patient can develop hematometra because of cyclic accumulation of trapped blood. Cyclic abdominal pain is relieved by excision of the active uterine anlagen. A patient with MRKH syndrome was reported who had a 4-cm endometrioma removed from the left ovary by laparotomy at the time of operation to create a vagina. Myomas have been reported to form in the muscular wall of inactive uterine anlagen, and dysmenorrhea has been attributed to their presence. A small myoma has been found, in addition to the tube and ovary, in the inguinal canal and in the inguinal hernia sac. Due to the rarity of the condition, interaction with the radiologist about the patient’s history is important to make an accurate diagnosis.






FIGURE 25.4 Patients with congenital absence of the vagina can show variation in the development of the upper müllerian ducts. A: Bilateral rudimentary uterine bulbs without endometrium. B: Bilateral rudimentary uterine bulbs containing a cavity lined with functioning endometrial tissue. Crosssectional view shows presence of menstrual blood.

Chakravarty and colleagues and Singh and Devi have demonstrated that the rudimentary bulbs have the potential for function. These authors used these rudimentary uterine bulbs to reconstruct a midline uterus. The reconstructed uterus was then connected to a newly constructed vagina. A surprising number of patients who have undergone this procedure have experienced cyclic menstruation, although recurrent stenosis and obstruction of the rudimentary horns are the most common results of such efforts. The authors of this chapter have had no experience with this technique and question its usefulness. In the majority of cases, these rudimentary uterine bulbs usually are insignificant structures that cause no problems.


Associated Urologic and Renal Anomalies

Fore and associates reported that 47% of patients in whom evaluation of the urinary tract was performed had associated urologic anomalies. In other studies, approximately one third of patients with complete vaginal agenesis were found to have significant urinary anomalies, including unilateral renal agenesis, unilateral or bilateral pelvic kidney, horseshoe kidney, hydronephrosis, hydroureter, and a variety of patterns of ureteral duplication. A significant number of patients with partial vaginal agenesis also have associated urinary tract anomalies.


Associated Skeletal and Other Anomalies

Associated skeletal anomalies have been recognized since congenital absence of the vagina was first described. In a review of 574 reported cases, Griffin and associates found a 12% incidence of skeletal abnormalities. Most of these abnormalities involve the spine (wedge vertebrae, fusions, rudimentary vertebral bodies, and supernumerary vertebrae), but the limbs and ribs also can be involved. Other anomalies include syndactyly, absence of a digit, congenital heart disease, and inguinal hernias, although the latter are more often present in patients with androgen insensitivity syndrome than in patients with MRKH syndrome (Fig. 25.3). Consideration of cardiac anomalies is also important, as Pittock and colleagues reported a substantial incidence of cardiac defects (16%) when reviewing a group of 25 patients with MRKH at the Mayo Clinic.
The recognized association of absent vagina with imperforate anus and rectovestibular fistula will likely be diagnosed in infants and treated by the pediatric surgeon at the time of the rectal pull through (most commonly with sigmoid neovaginoplasty). However, the condition may not be noted or treatment may be deferred to young adulthood. Knowledge of this association can be important at the time of treatment as creation of an adequate neovagina with dilation may be impaired by scarring at the previous fistula site in the vestibule. Assessment of vaginal adequacy as a young adult is important as the neovagina created in childhood may need revision or augmentation.


Treatment for Disorders of Müllerian Agenesis


Pretreatment Considerations

If functioning endometrial tissue is present with the anlagen, then symptoms from cryptomenorrhea will begin shortly after female secondary sex characteristics develop. Prompt removal of the active uterine bulbs affords complete relief of symptoms.

Occasionally, older patients with the classic MRKH syndrome consult a gynecologist because of difficult or painful intercourse. The indication for operation in these patients is obvious. Of all patients, they are the most satisfied with the operative results.

Most commonly, patients aged 14 to 16 years are seen by a gynecologist because of primary amenorrhea. An examination may not have been performed by a previous physician because the patient was “too young,” but various hormonal medications may have been given with the hope that menstruation would begin. An inaccurate examination may have led to the mistaken diagnosis of imperforate hymen. Futile attempts to incise the hymen may have resulted in scarring of the apex of the vaginal dimple before a correct diagnosis of congenital absence of the vagina was finally made. In the past, it was customary to advise delaying surgery to create a vagina for these young patients until just before their marriage. More recently, it has become usual to perform the procedure when patients are 17 to 20 years old and are emotionally mature and intellectually ready to manage the potential postoperative requirements for care, including manipulation of the vaginal form or the use of dilators.


Psychological Concerns

Insufficient attention has been given to the psychological aspects of this problem. The patient with congenital absence of the vagina cannot be made into a whole person simply by creating a perineal pouch for intercourse. Establishment of sexual function is only one concern and may be the easiest problem to correct. Evans reported that 15% of his patients have real psychiatric difficulty. He and David and associates suggest that psychiatric help should be initiated before the treatment to create a neovagina. Weijenborg and ter Kuile described the effect of a group program on women with Rokitansky syndrome. The authors held group sessions conducted by a gynecologist, a female social worker, and a woman with Rokitansky syndrome. Seventeen patients participated. Three women had elected not to create a vagina, six women created a vagina by dilatation or sexual activity, and eight women had undergone a vaginoplasty. Indices of psychological distress were measured before the program, at initiation of the program, and at the last group session. The results demonstrated that women with Rokitansky syndrome felt less anxious, less depressed, and less sensitive to interpersonal contact after participation in the semistructured program. These data support the value of group interaction in patients with Rokitansky syndrome.

Learning about this anomaly, especially at a young age, is a shock and is accompanied by diminished self-esteem. Such patients can be encouraged by having their gynecologist offer appropriate psychological and medical therapy with an experienced multidisciplinary team. The gynecologist can also point out that the patient will functionally be like other young women who have had a hysterectomy because of serious pelvic disease and who have satisfied their desire to be a parent through adoption or gestational surrogacy. When receiving this diagnosis, patients and families are looking for reassurance about the future. Liao and colleagues reported on women with Rokitansky (treated with dilation, no treatment, or surgery) who completed four questionnaires assessing health-related quality of life, emotional distress, and sexual function and underwent a vaginal examination. Of the 87 eligible participants, 56 (64%) took part in the study. Thirty-six women had used dilators in the past, and 7 (who were sexually active) had undergone vaginal surgery (laparoscopic Vecchietti 4, McIndoe 1, bowel 1, skin flap vaginoplasty 1). The range of time from surgery to participation in the study was 5 to 16 years. Twelve patients had no intervention to create a neovagina. The participants reported overall better physical health and poorer overall mental health compared with normative data. Anxiety levels were higher, especially for women who had treatment to create a neovagina (dilation or surgical treatment). Vaginal length had a positive correlation with overall sexual satisfaction but was not related to overall quality of life. Kimberley and colleagues in Australia reported on quality of life and sexual experience of patients with vaginal atresia or agenesis. Seventy patients were identified, but nine were excluded who were younger than 17 years, newly diagnosed, or developmentally delayed. Thirty-four women responded with 28 actual participants in the study. Of the 20 patients who completed the sexual satisfaction questionnaire, only four were treated surgically (Sheare procedure 3, McIndoe 1) and the remaining 16 created a neovagina with dilation. The quality-of-life outcomes as measured by the World Health Organization Quality of Life (WHOQOL-BREF) questionnaire showed overall quality of life to be comparable to that of the average Australian population. In addition to quality-oflife evaluation, psychosocial assessment is important as well. There was a strong correlation between the quality-of-life scores and sexual satisfaction, highlighting the importance of psychological and psychosocial supports in the management of young women affected by the condition. Time since diagnosis had a positive influence on overall sexual satisfaction, with 92% of women who received a diagnosis more than 5 years ago demonstrating satisfactory sexual function scores. Callens and her colleagues in the Belgian-Dutch Study Group on Disorder of Sex Development (DSD) attempted to evaluate the psychosexual and anatomical outcomes of patients after dilation or surgery to create a neovagina; however, only 7 of the 35 participants were noted to have a diagnosis of MRKH (all treated with skin graft neovaginoplasty). Of those patients, only two were examined to correlate the anatomic findings with the psychosexual responses. All of the patients completed at least some part of the Female Sexual Function Index (FSFI), a validated measure in the vaginal reconstruction population, with the mean score of 25.0, which falls below the 26.55 cutoff, implying that they are at risk for developing sexual dysfunction. The authors acknowledged that their population was not randomized for treatment, was recruited exclusively from a clinical sample, and may have been biased by including patients who created a sufficient vagina by coitus alone with those that followed a dilation program. Regardless, their results support that any treatment for vaginal hypoplasia may be of limited utility without psychological expertise to address other aspects of self-perception. More work in the
area of overall quality of life, well-being, and emotional/sexual wellness is needed in this population.

When counseling patients, gestational surrogacy should definitely be included in the discussion. Until recently, the literature had provided only sparse evidence regarding the use of this modality in this population. Beski and colleagues confirmed the use of gestational surrogacy in a small population. The treatment cycles resulted in six clinical pregnancies (42.9% pregnancy rate per embryo transfer and 54.5% per oocyte retrieval) and three live births (21.4% per embryo transfer, 27.3% per retrieval, and 50% per patient). Several authors have reported on the genetic offspring of patients with vaginal agenesis. Petrozza and colleagues reported a retrospective study in 1997, describing a large number of treatment cycles for patients with Rokitansky syndrome. The authors attempted to determine an inheritance pattern of the syndrome through a questionnaire sent to all centers performing surrogacy treatment in the United States. A total of 162 in vitro fertilization/surrogacy treatment cycles were reviewed for 58 patients with congenital agenesis of the uterus and vagina. The treatment resulted in 34 live births (17 girls, 17 boys). One child had a nonspecific middle ear defect and hearing loss. The authors concluded that congenital absence of the uterus and vagina was not commonly inherited in a dominant fashion. These findings suggest that inheritance of this disorder in children of affected mothers is likely via a polygenic mechanism. In this population, none of the 17 female infants born to affected mothers exhibited Rokitansky syndrome. Ovulation induction is similar to other patients; however, oocyte retrieval may be more challenging. Typically, oocytes are retrieved transvaginally; yet, after creation of a neovagina, the ovaries may not be as easily accessible. In addition, ovaries may be ectopically located, higher in the abdomen. Barton and colleagues reported success with a transabdominal approach without decrease in safety or efficacy. Five of the sixty-nine women who underwent abdominal follicular aspiration were noted to have congenital reproductive anomalies.


Patient Cooperation

Regardless of which operative technique is chosen, the patient must cooperate if the operation is to be successful. In many of the available vaginal reconstruction techniques, dilation or use of a vaginal mold will be necessary. For example, when a McIndoe operation is performed, patients must understand the need to wear a form continuously for several months and intermittently for several years until the vagina is no longer subject to constriction and until regular intercourse is taking place. No surgery should be performed until preoperative evaluation determines that the patient understands her essential role in its success. This is especially important when the patient is a younger teenager. The single most important factor in determining the success of vaginoplasty is the psychosocial adjustment of the patient to her congenital vaginal anomaly.


Laboratory and Diagnostic Testing

A complete chromosomal analysis should be considered in all patients. If there is a suspicion of ovarian dysgenesis, androgen insensitivity syndrome, or some aberration of the classic MRKH syndrome, then a consideration of additional SRY analysis should be entertained to assess the possible presence of any Y chromosome. A contrast study such as a magnetic resonance (MR) urogram or an intravenous pyelogram should be done preoperatively. This also provides an adequate survey for anomalies of the spine. If a pelvic mass is present, then additional special studies may be indicated to differentiate between hematometra, hematocolpos, endometrial and other ovarian cysts, and pelvic kidney. The MR urogram may facilitate the evaluation of the reproductive, urologic, and skeletal systems with one radiographic study.


Evaluation of Cyclic Pain

Some patients without a pelvic mass report cyclic pain. This pain can be ovulatory or possibly a result of dysmenorrhea originating in well-developed rudimentary uterine bulbs. The physician can differentiate between the two by asking the patient to keep a pain diary and reviewing the diagnostic imaging with an experienced reconstructive gynecologic surgeon or radiologist to ensure that an obstructed anlagen is not present. Occasionally, there is a question about whether a patient has congenital absence of the vagina or an imperforate hymen with cryptomenorrhea. The diagnosis is clarified before operative intervention by using radiographic imaging. Pelvic ultrasonography can often detect hematocolpos or an obstructed uterine anlagen distended with menstrual blood. Magnetic resonance imaging (MRI) can differentiate the two diagnoses, if necessary.


METHODS OF CREATING A VAGINA

There is no unanimity of opinion regarding the correct approach to the problem of vaginal agenesis (Table 25.3). With the development of the Ingram method for vaginal dilatation, fewer patients require surgical vaginoplasty. The American Congress of Obstetricians and Gynecologists has supported nonsurgical creation of a neovagina as first-line therapy since 2006. Increased utilization of additional surgical techniques has broadened the discussion of surgical treatment of vaginal agenesis. The role of tissue expanders in vaginoplasty has been reviewed by Patil and Hixon. Labial expansion with an expander having a capacity of 250 mL provides a flap
10 cm long and 8 cm wide with a 4-cm projection. Thus, wellvascularized flaps can be available to provide an outlet for stenosis-free vaginoplasty. This approach has been suggested to maximize the success of surgical vaginoplasty. A review of the methods devised for the formation of a vagina follows. The editors of this book have found the modified McIndoe technique to give the most consistently satisfactory results.








TABLE 25.3 Classification of Methods to Form a New Vagina





























































































Nonsurgical (intermittent pressure on the perineum)



Active dilatation



Passive dilatation


Surgical



Without the use of abdominal contents




Without cavity dissection





Vulvovaginoplasty





Constant pressure (Vecchietti)




No attempt to line cavity (now unacceptable)




Lining cavity with grafts





Split-thickness skin grafts (McIndoe operation)





Dermis grafts





Amnion homografts




Lining cavity with flaps





Musculocutaneous flaps





Fasciocutaneous flaps





Subcutaneous pedicled skin flaps





Labial skin flaps (can be created with tissue expander)





Penoplasty (transsexualism)


With use of abdominal contents (cavity lining with)



Peritoneum



Free intestinal graft



Pedicled intestine



Nonsurgical Methods

In 1938, Frank described a method of creating an artificial vagina without operation. In 1940, he reported remarkably satisfactory results in eight patients treated with this method. His follow-up study showed that a vagina formed in this manner remained permanent in depth and caliber, even in patients who neglected dilatation for more than 1 year. It has been emphasized that the pelvic floor itself is embryologically deficient in some patients. Indeed, the ease with which some patients are able to create a vagina with intercourse alone or with other intermittent pressure techniques can be explained on this basis. Five patients were reported to have developed enteroceles, one after coitus alone, three after a Williams vulvovaginoplasty, and three after a McIndoe operation. This complication can develop when the vaginal mucosa is brought in close proximity to the pelvic peritoneum, but a relative embryologic weakness or an absence of endopelvic fascia can also contribute to this complication. Rock, Reeves, and associates at the Johns Hopkins Hospital reported that an initial trial of vaginal dilatation was successful in 9 of 21 patients.

Prompted by the rewarding results of Broadbent and Woolf, Ingram has described a passive dilatation technique of creating a new vagina. Instructing his patients in the insertion of dilators (Fig. 25.5) specially designed for use with a bicycle seat stool, Ingram was able to produce satisfactory vaginal depth and coital function in 10 of 12 cases of vaginal agenesis and 32 of 40 cases of various types of stenosis.






FIGURE 25.5 Vaginal dilators for use in Ingram passive dilatation technique to create a new vagina. The set from Faulkner Plastics consists of 19 dilators of increasing length and width.

The Ingram technique for passive dilatation has several advantages. The patient is not required to press the dilator against the vaginal pouch. A series of graduated Lucite dilators slowly and evenly dilate the neovaginal space. The patient should be carefully instructed in the use of dilators, as recommended by Ingram, beginning with the smallest dilator. The patient is shown and instructed with the use of a mirror how to place a dilator against the introital dimple. The dilator may be held in place with a supportive undergarment and regular clothing worn over this.

The patient is shown how to sit on a racing-type bicycle seat that is placed on a stool 24 inches above the floor. She is instructed to sit leaning slightly forward with the dilator in place for at least 2 hours/day at intervals of 15 to 30 minutes. Follow-up is usually at monthly intervals, and the patient can expect to graduate to the next size larger dilator approximately every month. An attempt at sexual intercourse may be suggested after the use of the largest dilator for 1 or 2 months. Continued dilatation is recommended if intercourse is infrequent. In our experience, functional success rates are outstanding. Roberts, Haber, and Rock previously reported the largest series of vaginal agenesis patients who used the Ingram method of dilatation to create a neovagina. The records of 51 patients with müllerian agenesis were reviewed: 37 patients attempted vaginal dilatation, and 14 young women underwent a surgical intervention. Functional success was defined as satisfactorily achieving intercourse or accepting the largest dilator without discomfort in the clinic visit. All patients were followed up for at least 2 years and for an average of 9.25 years. Functional success was achieved in 91.9% of those who attempted dilatation (Table 25.4). Thus, passive dilatation should be suggested as an initial therapy for vaginal creation. If dilatation is unsuccessful, operative vaginoplasty is indicated.

Edmonds and colleagues reported on their experience with managing 360 patients with MRKH from 1998 to 2010. Two hundred forty-five patients requested vaginal dilation for treatment. The mean age of dilating patients was 18.6 years (16 to 22 years). Success was defined as achieving sexual satisfaction and functional vaginal length (6 cm) and was achieved in 232 of 245 patients (94.7%). The mean time to complete therapy was 5.5 months (2 to 19 months). Despite having large number of patients in the study, the applicability outside of the United Kingdom could be questioned. The UK program consists of an intensive program in which patients have an identified clinical nurse specialist for teaching and support, one or two specific providers, and an inpatient admission (an average of 3 days) to teach dilation technique. Also, sexual satisfaction was not measured in a structured way for all patients; a subset of 60 patients were assessed using a sexual function questionnaire with the answers compared to a normal population. In the United States,
Gargollo and colleagues described their 12-year experience treating patients with vaginal agenesis. Rokitansky syndrome was the primary diagnosis in 64 of the 69 patients included in the retrospective review. The mean age at start of vaginal dilation was 17.5 years (14 to 35 years), and mean follow-up time was 19 months (0 to 100). Progressive perineal dilation was the treatment of choice. The total success rate was 88% achieving functional success (ability to achieve satisfactory vaginal intercourse, vaginal acceptance of the largest dilator, or vaginal length of at least 7 cm), during a mean of 18.7 months of therapy. Their work not only described an outpatient regimen that could be applicable in the United States but also highlighted the integral role that the multidisciplinary team plays in patient success. They also reinforced that dilating can be successful even in patients with a small vaginal dimple; thus, validating an attempt would be reasonable in almost all patients with vaginal agenesis.








TABLE 25.4 Outcomes of Patients with Vaginal Agenesis Who Attempted Dilatation

















PATIENTS


TOTALS


PERCENT


Successful dilatation


34/37


91.9%a


Failed dilatation


3/37


8.1%


a P < 0.001.


Modified from Roberts CP, Haber MJ, Rock JA. Vaginal creation for müllerian agenesis. Am J Obstet Gynecol 2001;185:1349, with permission. Copyright © 2001, Elsevier.



Surgical Methods

During the past three decades, experience has proved the Abbe-Wharton-McIndoe procedure (more popularly called the McIndoe operation) for dealing with complete absence of a vagina to be generally superior to others in most cases. In special circumstances, alternative methods of creation of a neovagina may be indicated.


Historical Development of Surgical Procedures

In 1907, Baldwin used a double loop of ileum to line a space dissected between the rectum and bladder, leaving the mesentery connected to the bowel. The continuity of the intestinal tract was reestablished by an end-to-end anastomosis. He reported that the new vagina was absolutely normal in every way. In 1910, Popaw constructed a vagina using a portion of the rectum that was moved anteriorly. This operation was modified by Schubert in 1911. The rectum was severed above the anal sphincter and moved anteriorly to serve as the vagina. The sigmoid was sutured to the anus to reestablish the continuity of the intestinal tract. Both operations had soberingly high morbidity and mortality rates, and their popularity declined. Today, segments of sigmoid are used most often to create a vaginal pouch or extend vaginal length in patients who have lost vaginal function as a result of extensive surgery or irradiation for pelvic malignancy. Some patients who are treated for multiple genitourinary or gastrointestinal abnormalities may be treated with a bowel vaginoplasty during a combined procedure.

Less formidable procedures involving dissection of a space between the bladder and rectum and lining of this space with flaps of skin from the labia or inner thighs also were tried. Marked scarring resulted, and hair usually grew in the vagina. Extensive plastic procedures to construct a vagina are no longer necessary or desirable and have been discarded in favor of safer procedures unless there is the problem of maintaining a vaginal canal after an extensive exenterative operation for pelvic malignancy. In this case, the physician may want to consider using the gracilis myocutaneous flap technique described by McCraw and associates in 1976.


The Abbe-Wharton-McIndoe Operation

This operation for creating a new vagina began with simple surgical attempts to create a space between the bladder and the rectum. These early attempts were often made in patients with cryptomenorrhea. However, such a space usually would constrict because the surgeon would fail to recognize the importance of prolonged continuous dilatation until the constrictive phase of healing was complete.

At the Johns Hopkins Hospital in 1938, Wharton combined an adequate dissection of the vaginal space with continuous dilatation by a balsa form that was covered with a thin rubber sheath and was left in the space. He did not use a split-thickness skin graft. Instead, he based his operation on the principle that the vaginal epithelium has remarkable powers of proliferation and in a relatively short time will cover the raw surface. Recalling that a similar process occurs in the fetus when the epithelium of the sinovaginal bulbs and the urogenital sinus form the vaginal canal, Wharton merely applied this same principle in the adult. This simple procedure is entirely satisfactory as long as the space is kept dilated long enough to allow the epithelium to grow in. Occasionally, however, even after several years, the vault of the vagina remains without epithelial covering. Coital bleeding and leukorrhea result from the persistent granulation tissue, and there is a tendency for vaginas constructed by this method to be constricted by scarring in the upper portion. In Counseller’s 1948 report from the Mayo Clinic of 100 operations to construct a new vagina, 14 were performed by the Wharton method, with excellent results in all 14 patients. It was stated that the disadvantages of persistent granulation tissue with bleeding and leukorrhea were of no consequence. This has not been the experience of the editors of this book.

When inlay skin grafts were first used to construct a new vagina, the results were poor because the necessity for dilatation of the new vagina again was not recognized. Severe contraction, uncontrolled by continuous or intermittent dilatation, almost invariably spoiled the results. Although Abbe and others preceded him by many years in using a skin-covered prosthesis in neovaginal construction, it was Sir Archibald McIndoe, at the Queen Victoria Hospital in England, who popularized the method and gave it substantial clinical trial. He emphasized the three important principles used today in successful operations for vaginal agenesis:



  • Dissection of an adequate space between the rectum and the bladder


  • Inlay split-thickness skin grafting


  • The cardinal principle of continuous and prolonged dilatation during the contractile phase of healing

Other tissues such as amnion and peritoneum have been used to line the new vaginal space, but they have not had substantial success. However, Tancer and associates reported good results with human amnion. Karjalainen and associates stated that a more physiologic result was achieved with an amnion graft than with a skin graft. Nevertheless, concerns about the transmission of human immunodeficiency virus with human amnion now limit this option.


Technique of Abbe-Wharton-McIndoe Operation


TAKING THE GRAFT

After a careful pelvic examination is performed under anesthesia to verify previous findings, the patient is positioned for taking a skin graft from the buttocks. For cosmetic reasons, the graft should not be taken from the thigh or hip unless for some reason it cannot be obtained from the buttocks. Patients may be asked to sunbathe in a bathing suit before coming to the hospital so that its outline can be seen; an attempt should be made to take the graft from both buttocks within these borders. The quality of the graft determines to a great extent the success of the operation. We have found the Padgett electrodermatome to be the most satisfactory instrument for taking the graft. With relatively little experience and practice, the gynecologic surgeon can successfully cut a graft of controlled width and thickness (Fig. 25.6). The instrument is set and checked for taking a graft approximately 0.018 inch thick and 8 to 9 cm wide. The total graft length should be 16 to 20 cm. If the entire graft cannot be taken from one buttock, then a graft 8 to 10 cm long is needed from each buttock.







FIGURE 25.6 Section of split-thickness skin grafts. Grafts should be uniform in thickness. The Padgett electrodermatome is set to take a graft approximately 0.018 inch thick. A graft that is slightly thick is better than a thin graft.

The skin of the donor site is prepared with an antiseptic solution (povidone-iodine), which is then thoroughly washed away. The skin is then lubricated with mineral oil as assistants steady and stretch the skin tight. Considerable pressure should be applied uniformly across the dermatome blade. The thickness of the graft must have minimal variation. A graft that is a little too thick is better than one that is a little too thin. There should be no breaks in the continuity of the graft. The graft is placed between two layers of moist gauze, and the donor sites are dressed. The donor site is soaked with a dilute solution of epinephrine for hemostasis, and a sterile dressing is applied. A pressure dressing is then placed over the site; this dressing can be removed on the seventh postoperative day. The sterile dressing dries in place over the donor site and ultimately will fall off by itself. Moistened areas on the dressing can be dried with cool air. If there is separation and evidence of some superficial infection, then merbromin can be applied to these areas.






FIGURE 25.7 The McIndoe procedure. A: A transverse incision is made in the apex of the vaginal dimple. B: A channel can usually be dissected on each side of the median raphe. The median raphe is then divided. Careful dissection prevents injury to the bladder and rectum. C: A space between the urethra and bladder anteriorly and the rectum posteriorly is dissected until the undersurface of the peritoneum is reached. Incision of the medial margin of the puborectalis muscles will enlarge the vagina laterally.


CREATING THE NEOVAGINAL SPACE

The patient is placed in the lithotomy position, and a transverse incision is made through the mucosa of the vaginal vestibule (Fig. 25.7A). The space between the urethra and bladder anteriorly and the rectum posteriorly is dissected until the undersurface of the peritoneum is reached.
This step may be safer with a catheter in the urethra and sometimes a finger in the rectum to guide the dissection in the proper plane. After incising the mucosa of the vaginal vestibule transversely, the physician often is able to create a channel on each side of a median raphe (Fig. 25.7B), starting with blunt dissection and then dilating each channel with Hegar dilators or with finger dissection. In some instances, it may be necessary to develop the neovaginal space by dissecting laterally and bringing the fingers toward the midline. The median raphe is then divided, thus joining the two channels. This maneuver is helpful in dissecting an adequate space without causing injury to surrounding structures.

To avoid subsequent narrowing of the vagina at the level of the urogenital diaphragm, it may be helpful to incise the margin of the puborectalis muscles bilaterally along the midportion of the medial margin (Fig. 25.7C). Although useful in all circumstances, incision of the puborectalis muscle is more important in cases of androgen insensitivity syndrome with android pelvis, in which the levator muscles are more taut against the pelvic diaphragm, than in cases of gynecoid pelvis. Incision of the puborectalis muscle causes no difficulty with fecal incontinence, significantly improves the ease with which the vaginal form can be inserted into the canal in the postoperative period, and has eliminated the problem of contracture of the upper vagina caused by a poorly applied form. The dissection should be carried as high as possible without entering the peritoneal cavity and without cleaning away all tissue beneath the peritoneum. A split-thickness skin graft will not take well when applied against a base of thin peritoneum. All bleeders should be ligated by clamping and tying them with very fine sutures. It is essential that the vaginal cavity be dry to prevent bleeding beneath the graft. Bleeding causes the graft to separate from its bed, resulting in the inevitable failure of the graft to implant in that area and in local graft necrosis.


PREPARING THE VAGINAL FORM

Early skin grafts were formed over balsa, which has the advantages of being an inexpensive, easily available, light wood that can be sterilized without difficulty. It also can be whittled easily in the operating room to a proper shape to fit the new vaginal space. However, uneven pressure from the form can cause a skin graft to slough in places, and pressure spots are associated with an increased risk of fistula formation. The Counseller-Flor modification of the McIndoe technique (Fig. 25.8) uses, instead of the rigid balsa form, a foam rubber mold shaped for the vaginal cavity from a foam rubber block and covered with a condom. The foam rubber is gas sterilized in blocks measuring approximately 10 × 10 × 20 cm. The block is shaped with scissors to approximately twice the desired size, compressed into a condom, and placed into the neovagina (Fig. 25.8A-C). The form is left in place for 20 to 30 seconds with the condom open to allow the foam rubber to expand and conform to the neovaginal space (Fig. 25.8D). The condom is then closed, and the form is withdrawn. The external end is tied with 2-0 silk, and an additional condom is placed over the form and tied securely (Fig. 25.8E, F).


SEWING THE GRAFT OVER THE VAGINAL FORM

The skin graft is then placed over the form and its undersurface exteriorized and sewn over the form with interrupted vertical mattress 5-0 nonreactive sutures (Fig. 25.8G, H). Where the graft is approximated, the undersurfaces of the sutured edges are also exteriorized.

The graft should not be “meshed” to make it stretch farther, and the edges of the graft should be approximated meticulously around the form without gaps. Granulation tissue develops at any place where the form is not covered with skin. Contraction usually occurs where granulation tissue forms. After the form has been placed in the neovaginal space, the edges of the graft are sutured to the skin edge with 5-0 nonreactive absorbable sutures, with sufficient space left between sutures for drainage to occur. The physician must be careful not to have the form so large that it causes undue pressure on the urethra or rectum. A balsa form should have a groove to accommodate the urethra. With a foam rubber form, this is unnecessary. A suprapubic silicone catheter is placed in the bladder for drainage. If the labia are of sufficient length, then the form can be held in place by suturing the labia together with two or three nonreactive sutures.


REPLACING WITH A NEW FORM

After 7 to 10 days, the form is removed and the vaginal cavity is irrigated with warm saline solution and inspected. This is usually performed with mild sedation and without an anesthetic. The cavity should be inspected carefully to determine whether the graft has taken satisfactorily in all areas of the new vagina. Any undue pressure by the form should be noted and corrected. It is especially important that there not be too much pressure superiorly against the peritoneum of the cul-de-sac. Such a constant upward pressure could result in weakness with subsequent enterocele formation. The new vaginal cavity must be inspected frequently to detect and to prevent pressure necrosis of the skin graft.

The patient is given instructions on daily removal and reinsertion of the form and is taught how to administer a lowpressure douche of clear warm water. She is advised to remove the form at the time of urination and defecation, but otherwise to wear it continuously for 6 weeks. A neoprene form, which is much easier to remove and keep clean than a foam rubber form, is substituted for the original form in 6 weeks. A new form is molded with a sterile sheath cover (condom) to fit the size of the vaginal canal. The patient is instructed to use the form during the night for the following 12 months. If there has been no change in the caliber of the vagina by that time, then it is unlikely to occur later, and insertion of the form at night can be done intermittently until coitus is a frequent occurrence. However, if there is the slightest difficulty in inserting the form, then the patient should be advised to use the form continuously again. Most patients are able to maintain the form in place simply by wearing tighter underclothes and a perineal pad. Douches are advisable during residual vaginal healing and discharge.


RESULTS AND COMPLICATIONS

Results with the McIndoe operation have improved over the years. Recently, reported percentages of satisfactory results have ranged from 80% to 100%. The serious complications formerly associated with the McIndoe operation have been significantly reduced by improvements in technique and greater experience. Serious complications do still occur, however, including a 4% postoperative fistula rate (urethrovaginal, vesicovaginal, and rectovaginal), postoperative infection, and intraoperative and postoperative hemorrhage. Failure of graft take is also still reported as an occasional complication. Failure of graft take often leads to the development of granulation tissue, which might require reoperation, curettage of the granulation tissue down to a healthy base, and even regrafting. Minor granulation can be treated with silver nitrate application. The functional result is more important than the anatomic result in evaluating the success of this operation. Although a vagina of only 4 cm is adequate for some couples, in most instances, a vagina smaller than 4 cm causes major problems.







FIGURE 25.8 Counseller-Flor modification of the McIndoe technique. A: A form is cut from a foam rubber block. B: A condom is placed over the form. C: The form is compressed and placed into the vagina. D: Air is allowed to expand the foam rubber, which accommodates to the neovaginal space. The condom is closed and the form removed. A second condom is placed over the form (E) and tied securely (F). G: The graft is then sewn over the form with interrupted 5-0 nonreactive sutures. H: The undersurfaces of the sutured edges of the graft are exteriorized. The vaginal form is ready for insertion into the neovagina.

The postoperative results have improved significantly since the balsa vaginal form was replaced by the foam rubber form. Between 1950 and 1989, the McIndoe operation was performed on 94 patients at the Johns Hopkins Hospital. During these 39 years, 83% of the 94 patients had a 100% take of the graft; in only three cases was there a significant area over which the graft failed.

Urethrovaginal fistula has become even more infrequent since the introduction of the suprapubic catheter and the foam rubber form. The catheter is removed when the patient is voiding well and has no residual urine. In general, the patient is able to void without difficulty within the first few days of the procedure. Prophylactic broad-spectrum antibiotics started within 12 hours of surgery and continued for 7 days are of definite value in reducing the incidence of graft failures from infection in the operative site.

Because of the excellent results obtained after a modified McIndoe vaginoplasty, this operation is recommended as the procedure of choice for women unable or unwilling to obtain a neovagina with dilatation methods. Women with a flat perineum with no dimple or pouch have no alternative other than the McIndoe vaginoplasty to obtain a neovagina for comfortable sexual relations.

Desirability of the modified McIndoe procedure may be increased by the use of alternative graft harvest sites to conceal possible aesthetic concerns of the buttock site, as proposed by
Höckel and colleagues. The authors proposed the use of split skin harvesting from the scalp because thin (0.25-mm) split skin grafts do not seem to hamper hair growth at the donor site nor lead to hair growth at the recipient site. Because alopecia has been reported as a complication associated with technical errors, more experience is necessary before advocating the scalp as a potential graft harvest site.

It is important that a McIndoe operation be performed correctly the first time. If the vagina becomes constricted because of granulation tissue formation, injury to adjacent structures, or failure to use the form properly, then subsequent attempts to create a satisfactory vagina are more difficult. The first operation has the best chance of success.

Ozek, like many other surgeons, modified the McIndoe procedure by describing an X-type perineal incision and the use of a perforated vaginal mold during the postoperative period. He postulated that this incision minimized stricture at the vaginal introitus and provided greater ease of dissection of the vaginal cavity. He reinforced that the overall procedure is simple with a generally uneventful postoperative course. Complications included infection, failure of skin graft take, stress urinary incontinence, partial graft loss, and vaginal stricture. All were treated satisfactorily except the patient with stress urinary incontinence.

Despite any minor modifications of the McIndoe vaginoplasty, the essential components of dissection of an adequate space, split-thickness skin grafting, and continuous dilatation during the contractile phase of healing remain unchanged. Recent reviews continue to support the safety and efficacy of the procedure. Hojsgaard and Villadsen reported 26 patients who underwent vaginoplasty, 18 of whom had Rokitansky syndrome. All patients were recorded as having a satisfactory result with complete graft take, adequate vaginal dimensions, and no strictures or fistulas giving symptoms. Complete take was achieved in 33% of patients within a week postoperatively, and after one further grafting procedure, an additional 38% had complete take. The intraoperative and early postoperative complications were perforation of the rectum in one patient (3.8%) and postoperative bleeding in three patients (11.5%). The late complications were vaginal stricture in three patients (11.5%), urethrovaginal fistula in two patients (7.7%), and rectovaginal fistula in one patient (3.8%). Alessandrescu and colleagues described the surgical management of 201 cases of Rokitansky syndrome. The surgeon substituted a modified transverse perineal incision and a perforated, rigid plastic mold. Intraoperative and postoperative complications consisted of two rectal perforations (1%), eight graft infections (4%), and 11 infections of graft site origin (5.5%). Sexual satisfaction was investigated with both objective and subjective criteria. Among the 201 cases, 83.6% had anatomic results evaluated as “good,” 10% as “satisfactory,” and 6.5% as “unsatisfactory.” More than 71% of patients rated their sexual life as “good” or “satisfactory” and reported that they had been able to experience orgasms related to vaginal intercourse. Twenty-three percent reported the ability to have sexual intercourse but had no ability to achieve orgasm, and only 5% expressed dissatisfaction with their sexual performance. Strickland and colleagues reported on the coital satisfaction, perception of vaginal competence, and impact on lifestyle of adult women undergoing vaginoplasty as adolescents. Ten of twenty-two women responded to a questionnaire at a median of 18 years (range 5 to 13 years) following surgical intervention with a McIndoe vaginoplasty. All of the women had sexual experience, and 80% were sexually active at the time of evaluation. The most frequent difficulty reported was vaginal dryness and lack of lubrication with sexual intercourse. Ninety percent of the subjects expressed satisfaction that sexual ability was acceptable. This experience also supports the role of the McIndoe vaginoplasty in providing young women with vaginal agenesis long-term coital ability and minimal disabilities.


DEVELOPMENT OF COMPLICATIONS

Several case reports exist of malignant disease developing in a vagina created by various techniques; these reports were reviewed by Gallup and colleagues, as well as others. The authors reported a patient who was initially treated for intraepithelial malignancy by total vaginectomy combined with a split-thickness skin graft vaginoplasty to reconstruct a functional vagina. The authors noted a lesion in her vaginal apex 7 years later. These findings suggest that epithelium transplanted to the vagina can assume the oncogenic potential of the lower reproductive tract. The evidence supports a risk of neoplastic change in both skin and bowel grafts, with a reported average interval from vaginoplasty to diagnosis on the order of 19 years or greater. Epithelium transplanted to the vagina will assume the oncogenic potential of the lower reproductive tract. With less than 25 cases of primary carcinoma of the neovagina reported, it is presently unclear if transplantation of bowel or other graft tissue alone changes the malignancy risk. Consideration of a plan for surveillance and counseling regarding transmission risk for virally related dysplastic change in the lower genital tract is also extremely important for any patients undergoing neovaginoplasty. Neovaginal vault prolapse has also been reported in patients managed both medically and surgically. Without apical or lateral suspension by endopelvic fascial attachments, subsequent prolapse may develop with any type of neovagina. Prolapse in neovaginal segments created by dilation, McIndoe technique, skin flaps, and bowel segments is reported. Abdominal suspension via sacrocolpopexy, abdominal suspension to the Cooper ligament, vaginal resection of redundant prolapsed bowel neovagina, and sacrospinous ligament suspension have all been described as treatment. Kondo and colleagues report a recurrence rate after surgical treatment of 25%.


The Williams Vulvovaginoplasty

Construction of a perineal bridge to help contain the vaginal mold was a routine part of the operation described by McIndoe, but it was not adopted subsequently by others. However, Williams described a similar vulvovaginoplasty procedure in 1964 and advised that it could be used to create a vaginal canal (Fig. 25.9). In 1976, he reported that the procedure was unsuccessful in only 1 of 52 patients. Feroze and coworkers reported that the anatomic results were good in 22 of 26 patients. According to these authors, the advantages of the Williams operation are its technical simplicity, its absence of serious local complications even when performed as a repeat procedure, the ease of postoperative care, the absence of postoperative pain, the speed of recovery, the possible elimination of dilators and consequent applicability to patients who do not intend to have regular intercourse in the near future, and the higher success rates of primary and repeat procedures. The technique is not applicable to patients with poorly developed labia. It does result in an unusual angle of the vaginal canal, which is reported to straighten to a more normal direction with intercourse. If a very high perineum is created, urine can momentarily collect in the pouch after urination, giving the impression of postvoid incontinence. Failure of the suture line to heal by primary intention results in a large area of granulation tissue and most likely an unsatisfactory result.

Williams believes that if the urethral meatus is patulous, a vulvovaginoplasty should not be performed because the urethra might be stretched further by coitus. He suggests that varying deficiencies in muscular and fascial tissue can explain
why some patients with uterovaginal agenesis are able to develop a satisfactory vaginal canal with simple intermittent pressure with coitus, whereas others are prone to develop enteroceles.






FIGURE 25.9 The Williams vulvovaginoplasty. A-C: No. 3-0 polyglycolic acid sutures can be used throughout to close both inner and outer skin margins and the tissue between. D: The entrance to the pouch should not cover the external urethral meatus.

The Williams vulvovaginoplasty is a useful operation and should certainly be considered the operation of choice for patients needing a follow-up to an unsatisfactory primary operation to create a neovagina or a supplement to a small vagina resulting from extensive surgery or radiation therapy, when options are limited. It remains an option for the rare patient with a solitary kidney low in the pelvis who does not have room for dissection of an adequate vaginal space.

Jun 4, 2016 | Posted by in GYNECOLOGY | Comments Off on Surgery for Anomalies of the Müllerian Ducts

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