A rare cause of small bowel obstruction.

Magnetic resonance (MR) imaging performed at our hospital revealed that the ileal segments were clustered and encapsulated within a thick oval sac in the lower abdomen (Figure 1a). Small bowel dilatation with air-fluid levels, mural enhancement, and a small amount of intraperitoneal free fluid were associated with this finding (Figure 1b). The patient underwent exploratory laparotomy with a presumptive diagnosis of bowel obstruction.