• Most cases of rectal prolapse reduce spontaneously.
• Rarely, a surgical procedure may be necessary to correct a full-thickness prolapse.
• Rectal prolapse should be promptly reduced to prevent a sustained prolapse that allows edema to form and potential subsequent venous congestion and thrombosis to develop, which may lead to ulceration of the rectal mucosa with bowel ischemia and infarction.
• A rectal examination needs to be performed to differentiate prolapse from an intussusception or rectal polyp.
• Diagnostic studies are often not necessary, but a proctoscopy, colonoscopy, or barium enema may be indicated when the patient has a history of rectal bleeding.
• Children need to be tested for parasites and cystic fibrosis as well as other causes of anal straining (including neuromuscular problems, proctitis, and inflammatory bowel disease).
• There are very few risks with manual reduction.
• Parents should be informed that prolapse may recur and instructed on proper technique for reduction.
• Discuss the potential risk of sedative medication.
• Recurrent prolapse or a prolapse that is not amenable to manual reduction may require operative intervention.
• Rectal prolapse commonly presents in children between the ages of 1 and 3 years, with a primary symptom of anal discomfort or prolapse after defecation; occasionally it may present as bleeding.
• When a prolapse is not immediately present and the child is old enough to cooperate, diagnosis can potentially be made with the child squatting or straining on the toilet.
• A glycerine suppository may also aid in the diagnosis.
• Palpate the prolapsed segment between the fingers and thumb to help differentiate mucosa from full-thickness prolapse.
• Mucosal prolapse tends to have radial folds and full-thickness prolapse exhibits concentric folds (Table 30–1).
• Differentiate from polyp, which is plum-colored and does not involve the entire anal circumference.
• Differentiate from intussusception, which on digital examination allows the examiner to insert between the anal wall and the protruding mass. With a prolapse, there is no space between the perianal skin and the protruding mass.
Characteristics | Mucosal Prolapse | Full-thickness Prolapse (Procidentia) |
---|---|---|
Layers involved | Mucosa only | All layers of the rectum |
Physical appearance | Rosette appearing with radial folds at anal junction | Circular folds in prolapsed mucosa |
May not be seen with significant edema |