Perineal Endometriosis: What to Do in These Cases - Analysis of 13 Patients

Objective: To analyse the clinical features of perineal endometriosis (PEM), its treatment and outcome. Methods: Prospective, single-centre study with 13 patients with PEM who were treated between 2011-2018 at Domingo Luciani Hospital and mean followed up for 58.4 months. Results: Mean age was 32,2 years. All cases had a history of vaginal delivery with an episiotomy. All complained of perineal pain related to the menstrual cycle; the perineal mass progressively increased in size and was tender during menstrual periods. Mean VAS was 7. 69,2% with rectal bleeding. The mean size of the lesion was 3.42 cm. CA125 levels were measured in all patients, 3 (23,1%) with abnormal range; all patients were subjected to transvaginal, endoanal ultrasonography (EUS) and FNAB before surgery. Anal sphincter (AS) involvement was demonstrated by EUS in 46.2% (6). Mean EUS pre-treatment volume 18.98 ml. First, these 6 patients received hormonal therapy based on GnRH and evaluated response. Mean EUS post-treatment volume 10.21 ml p < 0.05. Complete local excision was performed on all cases. Mean CCFIS preoperative was 2.46 and postoperative 3.01 p=0.01. No major complications or recurrences were noted. Conclusion: PEM presents with typical clinical features when it involves the AS, it could benefit from first a hormonal therapy before surgery. EUS is a useful preoperative tool to decide what we should do. The main idea at the time of surgery is performed a complete local excision with non-touch AS, and in cases where these aren’t possible, a sphincteroplasty is mandatory with good continence results, minor complications and no recurrences.