Abstract
A 25-year-old man visited the Department of Gastrointestinal Medicine at our hospital with a chief complaint of a one-year history of epigastralgia. Abdominal computed tomography (CT) at the initial visit showed a cystic lesion on the ventral side of the descending part of the duodenum, but because his symptoms had improved by the time he visited the hospital, he was followed up on an outpatient basis. An increase in the size of the lesion was seen on CT one year later, and the patient was therefore referred for surgery. The patient was diagnosed with a cystic tumor in the transverse mesocolon and underwent laparoscopic surgery. The tumor was located within the transverse mesocolon, and after managing the inflow vessels, the lesion alone was resected using an ultrasonically activated scalpel. Based on postoperative histopathological examination, the lesion was diagnosed as enteric duplication in the transverse colon. Enteric duplication in the colon is relatively rare in adults, and the present case is reported because only two cases in which laparoscopic surgery was performed, including the present case, have been reported in Japan.
