Although intestinal intussusception is relatively common in children, it remains a rare clinical entity in adults. We report a case of an 84-year-old woman who had mild diarrhea for 6 months. Further examination was performed. Ultrasonographic examination revealed the multiple concentric ring sign in her right flank. Colonoscopic examination revealed a pedunculated tumor with small nodular surface in the ascending colon from the cecum. The histopathological findings were consistent with the diagnosis of a carcinoma in adenoma. Computed tomography revealed the target sign in the transverse view, and invaginated mesenteric fat and associated vessels in the coronary view. She underwent laparoscopic ileocecal resection. The resected specimen revealed a round, pedunculated tumor with a small nodular surface, measuring 55×45 mm in size, in the cecum. The histopathological findings showed well differentiated tubular adenocarcinoma invading the mucosa. She is currently undergoing regular follow-up.
