Reversed intestinal malrotation with concurrent cecal carcinoma.

A 57-year-old man was admitted with a type 2 (ulcerated with clear margin) cancer in the cecum. Contrast-enhanced CT showed that the superior mesenteric vein was anterior to the superior mesenteric artery, and the patient was suspected of having intestinal malrotation. A laparoscopic-assisted ileocecal resection was performed. At operation, the cecum and the transverse colon passed through the root of the mesentery behind the superior mesenteric artery with the duodenum. Therefore, this was thought to be a reversed-type intestinal malrotation. After the operation, 3D-CT colonography with duodenography images were reconstructed to retrospectively confirm the diagnosis of a reversed malrotation. These images clearly demonstrated the abnormal anatomy and overall orientation of the intestine. Patients with a reversed intestinal malrotation and concurrent cecal cancer are extremely rare. Herein, we present a patient who underwent a laparoscopic-assisted ileocecal resection for cecal cancer that presented concurrently with a reversed intestinal malrotation.