대한대장항문학회

The authors experienced a case of reversed malrotation of intestinal tract which was<br>discovered unexpectedly during the operation for multiple colonic polyps. The patient<br>was sixty-year-old female who was previously healthy until 8 months before the<br>operation, when she developed tenesmus and constipation. She took segmental resection<br>of sigmoid colon due to adenomas with moderate to severe dysplasia. Her right side of<br>the transverse colon was found to be located within the lesser sac, posterior to the<br>stomach, duodenum and superior mesenteric artery. The other part of the colon were in<br>normal position. Because this congenital anomaly is known to be a rare type among the<br>rotational anomaly with few literature, we report a case with probable interpretation.<br>