title: Retroperitoneal bronchogenic cyst mimicking pancreatic cystic lesion.
abstract: Retroperitoneal bronchogenic cyst is detected extremely rarely and often masquerades as other diseases. Here, we report 2 cases of retroperitoneal bronchogenic cyst mimicking pancreatic mucinous tumor. Histologically, both cysts were composed of ciliated respiratory-like epithelium with abundant mucin content, smooth muscle bundles and mature cartilage, compatible with the diagnosis of retroperitoneal bronchogenic cyst. In addition to these 2 cases, another 42 retroperitoneal bronchogenic cysts reported in the English literature were collected for review and analysis. Twelve (28%) were located over the peripancreatic area. Just over half (51%) of them were asymptomatic. No accurate preoperative diagnosis could be made for any of the lesions. About a third (33.3%) of the peripancreatic retroperitoneal bronchogenic cysts masqueraded as pancreatic cystic lesions.
authors.affiliation: Department of Surgery, Taipei Veterans General Hospital, Taipei, Taiwan.
authors.forename: Shin-E
authors.initials: SE
authors.lastname: Wang
authors.forename: Yi-Fang
authors.initials: YF
authors.lastname: Tsai
authors.forename: Cheng-Hsi
authors.initials: CH
authors.lastname: Su
authors.forename: Yi-Ming
authors.initials: YM
authors.lastname: Shyr
authors.forename: Rheun-Chuan
authors.initials: RC
authors.lastname: Lee
authors.forename: Wan-Chen
authors.initials: WC
authors.lastname: Tsai
authors.forename: Fen-Yau
authors.initials: FY
authors.lastname: Li
authors.forename: Tien-Hua
authors.initials: TH
authors.lastname: Chen
authors.forename: Chew-Wun
authors.initials: CW
authors.lastname: Wu
authors.forename: Wing-Yiu
authors.initials: WY
authors.lastname: Lui
mesh_terms: D000368:Aged; D001994:Bronchogenic Cyst / Q000473:pathology*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010181:Pancreatic Cyst / Q000473:pathology*; D012187:Retroperitoneal Space