Objectives: The primary objective of the study was to compare the performance of the rectal water transvaginal ultrasonography (RWC-TVS) with and without bowel preparation (BP) in diagnosing rectosigmoid endometriosis. The secondary objectives were to compare the performance of the 2 exams in estimating infiltration of the mucosa, length of the largest rectosigmoid nodules, distance of the nodules from the anal verge, and presence of multifocal disease. Methods: This prospective study included patients with pain symptoms and intestinal complaints suggestive of endometriosis. Patients underwent RWC-TVS with and without BP within an interval of 1 week to 2 months. Two independent and blinded gynecologists performed the exams. The results of the 2 exams were compared with surgical and histologic findings. Results: A total of 155 patients were included in the study; 92 patients had rectosigmoid endometriosis. There was no significant difference in the performance of RWC-TVS with or without BP in diagnosing rectosigmoid endometriosis (P =.727). There was no significant difference in the performance of RWC-TVS with or without BP in diagnosing infiltration of the mucosa (P =.424) and multifocal disease (P =.688), in estimating the main diameter of the largest nodule (P =.644) and the distance between the more distal rectosigmoid nodule and the anal verge (P =.090). The patients similarly tolerated the 2 exams (P =.799). Conclusions: Bowel preparation does not improve the performance of RWC-TVS in diagnosing rectosigmoid endometriosis and in assessing the characteristics of these nodules.
- bowel endometriosis
- bowel preparation
ASJC Scopus subject areas
- Radiological and Ultrasound Technology
- Radiology Nuclear Medicine and imaging