Deep infiltrating endometriosis (DIE) involving the bowel, particularly the rectosigmoid region, is associated with significant gastrointestinal symptoms and impaired quality of life. Rectal shaving is a conservative surgical technique aimed at removing endometriotic lesions while preserving bowel integrity; however, it may result in residual disease or excessive thinning of the bowel wall, potentially leading to recurrence or complications.
Intraoperative ultrasound (IOUS) allows real-time assessment of residual nodule thickness and bowel wall thickness after shaving. This prospective observational study aims to evaluate the relationship between intraoperative ultrasound measurements and postoperative clinical outcomes, including gastrointestinal symptoms and quality of life.
The study also seeks to identify ultrasound cut-off values that may guide intraoperative surgical decision-making and optimize the balance between radicality and safety.
Female patients aged 20-60 years
Rectal or sigmoid nodule with muscularis propria infiltration ≥1 mm and <20 mm (assessed by expert transvaginal ultrasound)
Indication for surgery agreed upon with the patient
Written informed consent
Previous major bowel surgery or primary indication for bowel resection
Inflammatory bowel disease, malignancy, or severe pelvic pathology
Inability to complete study questionnaires