title: Intra-retroperitoneal duplication cyst.
abstract: Duplication cyst occupying the retro- and intra-peritoneal space is a rare condition. We describe a case of duplication cyst in a 13-year-old girl who presented with abdominal pain, vomiting, and a lower abdominal mass. Plain abdominal X-ray films revealed local ileus over the lower abdomen. Ultrasonography revealed 2 double-layered cystic masses over the lower abdomen with a suspicious communicating tract. Mild hydropelvis of the right kidney was also noted. Abdominal computed tomography revealed 2 cystic lesions. One was located at the pelvic cavity just above the urinary bladder and the other was in the left retroperitoneal space. Laparotomy revealed a dumbbell-shaped intra-retroperitoneal duplication cyst with a small communicating tract. The cyst was excised without disturbing bowel continuity and the vascular supply. The patient was doing well at 1-year follow-up.
authors.affiliation: Department of Pediatrics, Far Eastern Memorial Hospital, Taipei County 220, Taiwan.
authors.forename: Juine-Yih
authors.initials: JY
authors.lastname: Ma
authors.forename: Yu-Cheng
authors.initials: YC
authors.lastname: Lin
authors.forename: Sheng-Hong
authors.initials: SH
authors.lastname: Tseng
authors.forename: Tsung-Hsein
authors.initials: TH
authors.lastname: Lai
authors.forename: Yun
authors.initials: Y
authors.lastname: Chen
mesh_terms: D000293:Adolescent; D003560:Cysts / Q000175:diagnosis* / Q000601:surgery; D005260:Female; D006801:Humans; D010388:Pelvis; D012187:Retroperitoneal Space