SURGICAL TECHNIQUES FOR THE TREATMENT OF RECTAL ENDOMETRIOSIS: A SYSTEMATIC REVIEW OF RANDOMIZED CONTROLLED TRIALS AND OBSERVATIONAL STUDIES

ABSTRACT BACKGROUND Endometriosis is a common disease in reproductive-age women and it is estimated to occur in up to 50% of those with infertility. Intestinal involvement is reported in up to a third of the cases. This condition is related to chronic pain and loss of quality of life, resulting in emotional, social and economic costs. Treatment consists of hormonal block and surgical resection, with variable side effects and efficacy. The best choice for surgical treatment for rectal endometriosis is a matter of discussion regarding the indication and the best technique to be employed. OBJECTIVE To summarize data on indications, results and complications of surgical techniques for the treatment of rectal endometriosis. METHODS: This comprehensive systematic review is a compilation of the available literature and discussion, carried out by a team with experience in the surgical treatment of intestinal endometriosis. Data regarding indications, results and complications of conservative and radical techniques for the surgical treatment of rectal endometriosis was carefully reviewed. Searches of PubMed, EMBASE, and CENTRAL up to May 2021 were performed to identify randomized controlled trials (RCTs) and observational studies that compared at least two of the three surgical techniques of interest (i.e., shaving, discoid resection, segmental resection). RESULTS: One RCT and nine case series studies with a total of 3,327 patients met the eligibility criteria. Participants ages ranged from a mean of 30.0 to 37.9 years old. Mean follow-up ranged from 1.2 to 42.76 months. With regards the methodological quality, overall the included studies presented a low risk of bias in the majority of the domains. Surgical treatment of rectal endometriosis is indicated for patients with obstructive symptoms and those with pain scores above 7/10. Patients with disease involving beyond muscularis propria of the rectum, documented in magnetic resonance imaging or transvaginal pelvic ultrasound with intestinal preparation, are candidates for discoid or segmental resection. The presence of multifocal disease, extension greater than 3 cm and infiltration greater than 50% of the loop circumference favor the radical technique. The distance from the lesion to the anal verge, age, symptoms and reproductive desire are other factors that influence the choice of the technique to be employed. The risk of complications and unfavorable functional results seems to be directly related to the complexity of the procedure. CONCLUSION: The choice of surgical technique performed for the treatment of rectal endometriosis is a matter of discussion and depends not only on the preoperative staging, but also on the patient’s expectations, risks and potential complications, recurrence rates and the expertise of the multidisciplinary team.

A rare presentation of rectal endometriosis

Endometriosis is the ectopic growth of viable endometrium outside the uterus, affecting approximately 7% women. It can occur in the absence of visible pelvic disease. Most common sites are gastrointestinal and urinary tract. Common sites of involvement are rectosigmoid (51%), appendix (15%), small bowel (14%), rectum (14%), cecum and colon (5%). Cyclical hematochezia is a definitive, but rare association of intestinal endometriosis. The diagnosis of colonic endometriosis is also difficult owing to the poor diagnostic yield of colonoscopy.