A CASE OF CANCER OF THE SIGMOID COLON PROLAPSED FROM THE ANUS

A case of cancer of the sigmoid colon in which the carcinoma prolapsed from the anus due to intussusception is reported. A 62-year-old woman was seen at the hospital because she noticed of anal bleeding and a prolapsed intestine through the anus by about 20cm after evacuation. A Borrmann type 2 type 2 tumor was noted at the head of prolapsed intestine, and was diagnosed as adenocarcinoma on biopsy. Barium enema study revealed a claw like image and a pelvic CT scan presented target sign, indicating intussusception of the intestine. An iperation was performed with a diagnosis of intussusception of the intestine headed by the sigmoid cancer. During operation, we found difficulty in repositioning the intussusception completely due to severe adhasion, and performed a sigmoydectomy with lymph node dissection (group 3) in the state of invaginated intestine. The resected material revealed a 3.5×2.5cm Borrmann type 2 tumor with the invasion depth of mp that was a moderately differentiated adenocarcinoma of n0, Ly1, V0, ow (-), aw (-), and Stage I. So far another 20 cases of cancer of the sigmoid colon prolapsed through the anus due to intussusception have been seen in the Japanese literature. These redlatively rare 21 cases including ours are discussed in terms of clinical characteristics here.