In simple words: The presence of endometrial tissue (the lining of the uterus) outside the uterus, specifically in the sigmoid colon (part of the large intestine).

Endometriosis of the sigmoid colon.

Example 1: A 35-year-old female patient presents with chronic pelvic pain, painful bowel movements, and cyclical changes in bowel habits. Imaging and laparoscopic examination reveal endometrial tissue in the sigmoid colon, confirming the diagnosis of endometriosis., A 40-year-old woman experiences increasing pain and discomfort during bowel movements, along with rectal bleeding. After a thorough examination, including colonoscopy and imaging, she is diagnosed with sigmoid colon endometriosis., During a laparoscopy for suspected endometriosis, a 28-year-old woman is found to have endometrial implants on her sigmoid colon. The surgeon documents the finding and takes biopsies for confirmation.

Documentation should include details of the patient's symptoms (e.g., pelvic pain, bowel symptoms, dysmenorrhea), relevant medical history, findings from physical examination (including pelvic and rectal exams), imaging results (ultrasound, MRI, CT scan), and laparoscopic findings if applicable. Biopsy results confirming the presence of endometrial tissue are crucial.