title: Unusual presentation of intraparenchymal renal artery aneurysm mimicking cystic renal cell carcinoma: a case report.
abstract: We describe a case of intraparenchymal renal artery aneurysm in a 58-year-old normotensive man with a history of distal ureterectomy. Imaging studies of the pre-existing right renal mass had been interpreted as being consistent with a simple renal cyst. Three years after ureterectomy, a small parietal nodule with contrast enhancement developed within the cyst. Partial nephrectomy was carried out based on a preoperative diagnosis of cystic kidney cancer. Surprisingly, pathological diagnosis was an aneurysm with a revascularized thrombus. Even though the present case represents an extremely rare clinical manifestation of intraparenchymal renal artery aneurysm, clinicians should be aware that imaging studies cannot distinguish all instances of renal vascular disease.
authors.affiliation: Department of Urology, Kagoshima University Hospital, Kagoshima, Japan.
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Osako
authors.forename: Shuichi
authors.initials: S
authors.lastname: Tatarano
authors.forename: Kenryu
authors.initials: K
authors.lastname: Nishiyama
authors.forename: Yasutoshi
authors.initials: Y
authors.lastname: Yamada
authors.forename: Takaaki
authors.initials: T
authors.lastname: Yamagata
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Uchida
authors.forename: Masayuki
authors.initials: M
authors.lastname: Nakagawa
mesh_terms: D000783:Aneurysm / Q000175:diagnosis* / Q000601:surgery*; D002292:Carcinoma, Renal Cell / Q000175:diagnosis*; D003560:Cysts / Q000175:diagnosis; D003937:Diagnosis, Differential; D006801:Humans; D007680:Kidney Neoplasms / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012077:Renal Artery / Q000473:pathology* / Q000601:surgery*; D014057:Tomography, X-Ray Computed; D018608:Ultrasonography, Doppler