A Case of Foregut Cyst of Gallbladder

Heo, Pil Seog; Kim, Yong Bum; Song, Hong Seog; Kim, Jai Sam; Lee, Jin Heon; Kim, Hak Yang; Yoo, Jae Young; Kim, Joo Seop

Abstract

During the early embryonal stage of foregut development, malformations may be encountered. Foregut duplications are considered to be developed due to abnormal cannulization of the gastrointestinal tract. It may be communicating or non-communicating, and cystic or tubular. They are lined by mucosal membrane and subdivided into bronchogenic, esophageal, gastroenteric or ciliated hepatic cysts. We encountered a case of foregut cyst of gallbladder in pulmonary tuberculosis patient incidentally. The patient was a 37-year-old female complaining of nausea. Physical examination revealed no abnormal findings, but abdominal ultrasonography demonstrated small cystic mass in gallbladder. On endoscopic retrograde cholangiopancreatography, we found a filling defect of gallbladder which looked compressed externally. Abdominal computed tomography scan revealed 1 cm sized intramural cystic mass on the fundus of gallbladder. At laparotomy, 5x4x0.5 cm sized gallbladder was excised and it had greenish colored and soft surface. It also revealed 1.5x1.5 cm sized cyst. Pathology showed a cystic mass containing bronchial mucosa lined by ciliated pseudostratified columnar epithelium and underlying smooth muscle layers.