Case Report: PDF OnlyRetroperitoneal Bronchogenic Cyst Mimicking Pancreatic Cystic LesionWang, Shin-Ea; Tsai, Yi-Fanga; Su, Cheng-Hsia; Shyr, Yi-Minga, *; Lee, Rheun-Chuanb; Tsai, Wan-Chenb; Li, Fen-Yauc; Chen, Tien-Huaa; Wu, Chew-Wuna; Lui, Wing-YiuaAuthor Information aDepartment of Surgery, Taipei Veterans General Hospital, National Yang Ming University School of Medicine, Taipei, Taiwan, R.O.C. bDepartment of Radiology, Taipei Veterans General Hospital, National Yang Ming University School of Medicine, Taipei, Taiwan, R.O.C. cDepartment of Pathology, Taipei Veterans General Hospital, National Yang Ming University School of Medicine, Taipei, Taiwan, R.O.C. *Correspondence to: Dr Yi-Ming Shyr, Division of General Surgery, Department of Surgery, Taipei Veterans General Hospital, 201, Section 2, Shih-Pai Road, Taipei 112, Taiwan, R.O.C. E-mail: [email protected] Received: April 24, 2006; • Accepted: September 21, 2006. Journal of the Chinese Medical Association: November 2006 - Volume 69 - Issue 11 - p 538-542 doi: 10.1016/S1726-4901(09)70325-9 Metrics 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. © 2006 by Lippincott Williams & Wilkins, Inc.