“…The incidence rate of gastrointestinal endometriosis is 3%–37% of all cases, and rectum and sigmoid colon are the most common sites of it, accounting for 50%–70%. Patients with gastrointestinal endometriosis may present with symptoms such as colic pain, nausea, vomiting, constipation, diarrhea, rectal bleeding, tenesmus, pain during defecation and so on [ 2 , [4] , [5] , [6] , 10 , [12] , [13] , [14] ]. The incidence rate of abdominal scar endometriosis is 0.03%–12%.…”