Pelvic Exenteration



Pelvic Exenteration


Mario M. Leitao Jr

Richard R. Barakat





INTRODUCTION

Dr. Alexander Brunschwig was the first to report on the complete excision of pelvic viscera for advanced cancer (i.e., pelvic exenteration) in 1948. He described this procedure as “the most radical surgical attack so far described for pelvic cancer and also [what] would appear to be the most radical of abdominal operations that have been carried out with some measure of consistency.” The first operation was performed on December 12, 1946, at Memorial Hospital, which eventually became Memorial Sloan Kettering Cancer Center, in New York. Figures 54.1 and 54.2 are diagrams from Brunschwig’s manuscript. This manuscript included 22 cases, 15 of which were recurrent cervical cancers, and follow-up was very short (maximum follow-up was 8 months). There were 5 (23%) perioperative mortalities and a total of 9 (41%) deaths within 8 months. Subsequent reports from the same institution of the same procedure in patients with ovarian and endometrial cancers described 5-year overall survival (OS) of 7% and 14%, respectively, with morbidities of over 60% and perioperative mortalities of 23%. In 1989, Lawhead and colleagues reported an updated series on mostly cervical cancer patients; the 5-year OS was 23%. These early reports suggested that the procedure had a perioperative mortality that was similar to the 5-year OS, at the cost of severe short-term and long-term morbidity as well as absence of vagina. Therefore, it fell out of favor and was infrequently performed for many years.






FIGURE 54.1 Levels of transection for a translevator total pelvic exenteration, as described by Dr. Alexander Brunschwig. “c” is the transection at the rectosigmoid junction. “u” and “u’” are the levels of transection of the ureters. “PW” is the perineal phase with transection of the vulva, perineum, and anus. This has remained the basic level of transection to date. However, portions of the labia and the entire clitoris can often be spared. (Reprinted from Brunschwig A. Complete excision of pelvic viscera for advanced carcinoma. Cancer 1948;1:177-183, with permission. Copyright © 1948 American Cancer Society.)






FIGURE 54.2 The end result of an exenteration as described in Dr. Alexander Brunschwig’s original manuscript. The perineum is primarily closed without vaginal reconstruction, and a wet colostomy is noted. (Reprinted from Brunschwig A. Complete excision of pelvic viscera for advanced carcinoma. Cancer 1948;1:177-183, with permission. Copyright © 1948 American Cancer Society.)

As surgical techniques and perioperative management improved over subsequent years, investigators began to report improving outcomes with decreasing perioperative mortalities. Additionally, publications after the year 2000 report continued decreases in perioperative mortality. These reports are described in greater detail later in the chapter. Pelvic exenteration is now felt to be a reasonable option in select cases, if performed by experienced surgeons. It can provide a chance at long-term cancer control and survival, but it remains a highly morbid procedure.

Pelvic exenterations can be modified based on the tumor size and location. There are multiple options for vaginal reconstruction as well as for different types of urinary system diversions separate from the fecal system. Permanent end colostomies are still required in the vast majority of cases, but in highly select situations, it may be possible to reconnect the large bowel and avoid a permanent colostomy. The indications for these pelvic exenterative procedures have also been expanded at certain institutions. More attention is also paid to sexual issues in these women as well as to overall quality of life after such extensive procedures. The most commonly performed exenteration is a total pelvic exenteration, followed by anterior, and then posterior (Table 54.1).


INDICATIONS AND PREOPERATIVE EVALUATIONS

The selection of patients suitable for a pelvic exenteration is highly complex and individualized. The most common indication is recurrent cervical carcinoma limited to the central pelvis in a patient who has received prior full-dose pelvic radiotherapy (Table 54.2). Exenteration is also considered in select cases of patients with recurrent endometrial, vulvar, or vaginal carcinomas. Uterine sarcomas are extremely rare. The majority of patients with these tumors will have extrapelvic sites of disease at the time of recurrence, in which case
exenterative procedures are contraindicated. However, in cases of pelvic-only recurrences in patients with uterine sarcomas, exenteration may be possible. Exenteration is most often only considered if radiation therapy has been already utilized in the past and no further radiation therapy is possible. Primary exenteration at the time of initial diagnosis, as well as in patients who have not undergone prior radiation, has been reported, but should be reserved for few select cases.








TABLE 54.1 Types of Exenterations Performed in Published Series of Pelvic Exenteration for Gynecologic Malignancies





















































































































































































































AUTHOR (REFERENCE)


YEAR OF PUBLICATION


STUDY YEARS


N


TYPE OF EXENTERATION


TOTAL


ANTERIOR


POSTERIOR


Brunschwig


1948


1946-1948


22


22


0


0


Barber


1968


1947-1963


36


22


14


0


Symmonds


1975


1950-1971


198


66


114


18


Rutledge


1977


1955-1976


296


176


85


35


Lawhead


1989


1972-1981


65


48


14


3


Shingleton


1989


1969-1986


143


78


63


2


Soper


1989


1970-1987


69


41


16


12


Morley


1989


1964-1984


100


69


13


18


Stanhope


1990


1977-1986


133


49


22


1


Robertson


1994


1974-1992


83


28


54


1


Morris


1996


1955-1988


20


10


9


1


Goldberg


1998


1954-1994


154


72


65


17


Barakat


1999


1947-1994


44


23


20


1


Berek


2005


1956-2011


75


46


23


6


Goldberg


2006


1987-2003


103


103


0


0


Ungar


2008


1993-2006


41


2


39


0


Fotopoulou


2010


2003-2009


47


32


12


3


Benn


2011


1990-2009


54


36


13


5


Forner


2011


1999-2010


35


16


17


2


Kaur


2012


1999-2010


36


27


5


3


Khoury-Collado


2012


1997-2001


21


14


6


1


Schmidt


2012



282


262


14


6


Yoo


2012


2001-2011


61


42


17


2


Baiocchi


2013


1982-2010


77


42


18


8


TOTAL




2,195


1,326 (60%)


653 (30%)


145 (10%)


Exenteration was largely abandoned for patients with recurrent ovarian cancers after Barber and colleagues reported a dismal 5-year survival of 7%. However, this report was published in a time prior to effective systemic therapies. Total and/or anterior pelvic exenteration is still not a consideration in the vast majority of patients with newly diagnosed or recurrent ovarian cancers except in exceptional situations (e.g., palliation for a hemorrhaging pelvic tumor not amenable to other palliative measures). In general, palliation is rarely accepted as an indication for exenterative procedures. However, some form of supralevator posterior exenteration (i.e., “modified posterior exenteration”), as well as other bowel resections, are now routinely considered and performed in patients with newly diagnosed and recurrent ovarian cancers. These modified posterior exenterations are not as extensive, and ovarian cancer outcomes are generally quite different from those of the other sites. We will not include these modified posterior exenteration procedures for ovarian cancer in the remainder of the chapter.










TABLE 54.2 Primary Tumor Sites in the Published Series of Exenterations in Gynecologic Malignancies
















































































































































































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AUTHOR (REFERENCE)


YEAR OF PUBLICATION


STUDY YEARS


PRIMARY TUMOR SITE


CERVIX


ENDOMETRIUM


UTERINE SARCOMA


VAGINA


VULVA


CANCER, NOS


OVARY


NON-GYN


Brunschwig


1948


1946-1948


15


1


1


1


2


1


0


1


Barber


1965


1947-1958


0


0


0


0


0


0


22


0


Barber


1968


1947-1963


0


36


0


0


0


0


0


0


Symmonds


1975


1950-1971


59


13


0


27


8


7


4


22


Rutledge


1977


1955-1976


195


8


0


37


14


0


0


20


Lawhead


1989


1972-1981


51


2


0


5


4


1


2


0


Shingleton


1989


1969-1986


143


0


0


0


0


0


0


0


Soper


1989


1970-1987


41


4


0


14


4


5


0


1


Morley


1989


1964-1984


66


4


4


13


12


0


1


0


Stanhope


1990


1977-1986


133


0


0


0


0


0


0


0


Robertson


1994


1974-1992


54


4


0


14


6


0


1


4


Morris


1996


1955-1988


0


20


0


0


0


0


0


0


Goldberg


1998


1954-1994


109


13


0


15


9


2


4


2


Barakat


1999


1947-1994