“…Among the previously reported cases, 7 also had similar diseases or events; namely, perforation during endoscopic polypectomy, adhesion due to ileus, postappendectomy, postrectal resection for rectal carcinoma, ileus due to rectal cancer, postresection of gangrenous bowel, and stool impaction due to severe constipation. 16,17,[20][21][22]25 Considering the patients' history, SAIM may be more prevalent than previously recognized, and perforations develop in the context of disease or interventions in the intestine, such as endoscopic treatment or and systemic chemotherapy. We also hypothesized that the perforation of the diverticulum might precede severe diverticulitis, and perforation of the SAIM might be related to an increase in internal intestinal pressure without severe inflammation.…”