A Rare Case of a Right Lower Abdominal Bronchogenic Cyst Treated by Laparoscopic Surgery

Abstract

The patient was a 50-year-old Japanese woman who was referred to our hospital for a positive fecal occult blood test. Colonoscopy showed a laterally spreading tumor (LST) in the cecum. Enhanced computed tomography (CT) showed a mass lesion with a maximum diameter of 54 mm on the ventral side of the ascending colon, and abdominal ultrasonography confirmed fluid inside, diagnosing a cystic tumor. Laparoscopic ileocecal resection was performed to resect both the cystic tumor and the cecal LST. Histologically, the cyst wall was covered with pseudostratified ciliated epithelium resting on a smooth muscle layer and mucous glands, leading to a diagnosis of a bronchogenic cyst. The postoperative course was uneventful, and the patient was doing well with no evidence of recurrence 9 months after surgery.

Since bronchogenic cysts in the abdominal region usually occur in the upper left abdomen, this case, which showed bronchogenic cysts in the lower right abdomen, is extremely rare. Thus, a rare case of an abdominal bronchogenic cyst is presented together with a review of the literature.