title: [Retroperitoneal bronchogenic cyst: a case report].
abstract: A rare case of retroperitoneal bronchogenic cyst is presented. A 50-year-old man was referred to our hospital for an investigation of a retroperitoneal mass. Computed tomography and magnetic resonance imaging confirmed a retroperitoneal mass, about 4 cm in diameter, adjacent to the left kidney and spleen. On the basis of these imaging modalities, a definitive diagnosis of this mass could not be made. So, resection of the mass was performed. The removed mass was an unilocular cyst and filled with mucinous fluid. Histopathologically, the cyst wall was composed of a fibrovascular connective tissue containing mucus-secreting glands and cartilages and was lined by ciliated pseudostratified columnar epitherium. Thus, a diagnosis of bronchogenic cyst was made. Bronchogenic cysts are rare congenital anomalies of the primitive foregut and usually develop in the mediastinum and lung.
authors.affiliation: Department of Urology, Yonezawa City Hospital.
authors.forename: Norio
authors.initials: N
authors.lastname: Takahashi
authors.forename: Husao
authors.initials: H
authors.lastname: Murakami
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Umeda
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Haga
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kameoka
authors.forename: Keiichi
authors.initials: K
authors.lastname: Shishido
authors.forename: Osamu
authors.initials: O
authors.lastname: Yamaguchi
mesh_terms: D001994:Bronchogenic Cyst / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012187:Retroperitoneal Space / Q000473:pathology; D014057:Tomography, X-Ray Computed