Small bowel obstruction and small bowel feces sign on a CT scan

A CT scan of the abdomen at the level of the umbilicus (A) shows a transition zone defining the level of a small bowel obstruction (dashed arrow). The upstream small bowel (short arrow) is dilated and the downstream small bowel is decompressed (arrow). The descending colon is also decompressed (arrowhead). Image B is a sagittal reconstruction of the CT and shows the zone of transition (dashed arrow) and a small bowel feces sign (arrow) in the adjacent upstream small bowel. The rectum is empty (arrowhead).