[Association of brownish polyposis and diverticulosis in the sigmoid colon -- a case of mucosal prolapse syndrome].

The authors present a case of a 48 year-old man, who was diagnosed with several brownish sigmoid polyps of 1-2 cm size and diverticulosis on colonoscopy. Subsequently, laparoscopic sigmoid resection was carried out due to lower gastrointestinal bleeding. Histological examination revealed diverticulosis associated with polyposis. This rare entity is known in the literature as prolapse-type inflammatory polyp, which is a type of mucosal prolapse syndrome. The brownish discolouration was caused by hemosiderin deposition.