Perforated villous adenoma of the cecum: report of a case.

Villous adenomas are common neoplasms of the colon, often causing anemia or hemoccult positive stools. Less typically, these lesions may result in abdominal pain, melena, obstruction, or change in bowel habits. Intussusception may occur, but this complication is unusual in adults. Spontaneous bowel perforation attributable to colonic polyps has not been previously reported. We present here the first reported case of an adenomatous polyp with bowel perforation and bladder involvement.