Abstract
A 65-year-old man was seen at the hospital because of a 3-day history of abdominal pain and vomiting. Following abdominal CT scanning, colonic obstruction due to sigmoid colon cancer was diagnosed and a metallic stent was placed semi-urgently. Massive defecation occurred immediately after the placement and the patient started to take meals on the next day. On the 29th day after the placement, laparoscopic-assisted anterior resection of the rectum was performed. As the sigmoid colon was found to be lifted to the abdominal wall, invasion of sigmoid colon cancer into the abdominal wall was diagnosed and associated resection of the abdominal wall was performed. Histopathology showed that the portion at where the associated resection of the abdominal wall was done had no relation with cancer and that deep ulcer had formed at the stump of the stent causing inflammatory changes on the serosal aspect which presented a morphology looked like the cancer invasion into the abdominal wall. In this case it is etiologically considered that the stent might move after the placement and the stump had touched the bending portion of the intestine for a long time, causing the condition. Periodic imaging follow-up would be mandatory after the stent placement and we must use a long stent as far as possible near the bending portion. If the stent stump touches the bending portion, early surgery would be desirable.
