title: Intrarenal varix mimicking a cystic renal tumor.
abstract: BACKGROUND
  A case of intrarenal varix in a 60-year-old woman is reported.
  
  
  RESULTS
  The preoperative diagnosis was cystic tumor in the central part of the left kidney. Retrospectively, gadolinium-enhanced magnetic resonance (MR) imaging demonstrated a layered gadolinium sign, indicating the vascular nature of the mass.
  
  
  CONCLUSIONS
  Our experience shows that urologists should be aware of the possible presence of a renal cystic mass of vascular origin and of the usefulness of gadolinium-enhanced MR examination for making an identification.
authors.affiliation: Department of Urology, Kanazawa University School of Medicine, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Egawa
authors.forename: M
authors.initials: M
authors.lastname: Fukushima
authors.forename: T
authors.initials: T
authors.lastname: Hasegawa
authors.forename: K
authors.initials: K
authors.lastname: Komatsu
authors.forename: M
authors.initials: M
authors.lastname: Namiki
mesh_terms: D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D052177:Kidney Diseases, Cystic / Q000473:pathology*; D007680:Kidney Neoplasms / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D012082:Renal Veins / Q000473:pathology*; D014648:Varicose Veins / Q000473:pathology*