Giant submucosal lipomatous polyp causing perforation of sigmoid colon: a case report and review of literature.

Colonic lipomas are rare benign tumours that are usually asymptomatic. Large colonic lipomas can present with symptoms such as constipation, abdominal pain, bleeding per rectum, and intussusception. We report the case of an 82-year-old man presenting with sudden onset lower abdomen pain and features of peritonitis. An exploratory laparotomy revealed a perforation of sigmoid colon with a fleshy mass protruding through the perforation. No case of spontaneous perforated sigmoid colon by submucous giant lipoma is reported yet in the literature. We discuss the details of first such case, our management, the outcome and also briefly review the literature.