On opening the abdomen, there was a small amount of peritoneal fluid which was sent for cytology. The point of obstruction was located in the small bowel. The lesion appeared intrinsic with no tumor evident on the serosal surface. The lesion was resected with 4-cm margins proximally and distally. A stapled functional end-to-end anastomosis was performed. The open bowel segment shows the lesion arising on the mucosal surface, forming a circumferential apple-core lesion.
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