title: Chronic contained rupture of an abdominal aortic aneurysm mimicking a retroperitoneal tumor.
abstract: Chronic contained rupture of an abdominal aortic aneurysm (AAA) is a rare event that is difficult to diagnose due to the atypical and chronic symptoms. We report a case of chronic contained rupture of AAA mimicking a retroperitoneal tumor in a 36-year-old man. The patient presented with weight loss and chronic lower abdominal pain, and was referred to our clinic with a suspected retroperitoneal tumor. Abdominal computed tomography (CT) revealed a distinct mass measuring 15 x 10 x 10 cm in the left retroperitoneal space, involving the abdominal aorta. One week later he experienced sudden abdominal pain radiating to the back. He was subsequently diagnosed with ruptured AAA and aortic dissection. The patient received implantations of both common iliac arteries to the abdominal aorta using Y-grafts and an ascending-to-descending aortic graft in a two-stage operation. His recovery from surgery was uneventful.
authors.affiliation: The Department of Urology, Nihon University School of Medicine.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Obinata
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Takenobu
authors.forename: Takahiro
authors.initials: T
authors.lastname: Sakuma
authors.forename: Shuji
authors.initials: S
authors.lastname: Sugimoto
authors.forename: Kenya
authors.initials: K
authors.lastname: Yamaguchi
authors.forename: Daisaku
authors.initials: D
authors.lastname: Hirano
authors.forename: Toshio
authors.initials: T
authors.lastname: Yoshida
authors.forename: Satoru
authors.initials: S
authors.lastname: Takahashi
mesh_terms: D000328:Adult; D017544:Aortic Aneurysm, Abdominal / Q000000981:diagnostic imaging* / Q000601:surgery; D001019:Aortic Rupture / Q000000981:diagnostic imaging* / Q000601:surgery; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D011859:Radiography; D012186:Retroperitoneal Neoplasms / Q000000981:diagnostic imaging*