title: Malignant cystic nephroma.
abstract: OBJECTIVE
  To describe a malignant cystic nephroma in an asymptomatic man.
  
  
  METHODS
  Case report and review of the literature.
  
  
  RESULTS
  A 60 year old white male presented with an incidentally discovered right perirenal mass. An MRI demonstrated a large perinephric encapsulated mass with diffuse heterogeneity. Patient underwent a radical nephrectomy and retroperitoneal node dissection. Histopathological analyses of the resected specimen revealed malignant cystic nephroma.
  
  
  CONCLUSIONS
  This represents the first published report of this rare tumor in an adult patient.
authors.affiliation: Division of Urology, Duke University Medical Center, Durham, North Carolina 27710, USA.
authors.forename: Ganesh V
authors.initials: GV
authors.lastname: Raj
authors.forename: Charles
authors.initials: C
authors.lastname: Yowell
authors.forename: John F
authors.initials: JF
authors.lastname: Madden
authors.forename: Israel
authors.initials: I
authors.lastname: Nosnik
authors.forename: Vladimir
authors.initials: V
authors.lastname: Mouraviev
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Polascik
mesh_terms: D006801:Humans; D052177:Kidney Diseases, Cystic / Q000175:diagnosis*; D007680:Kidney Neoplasms / Q000175:diagnosis* / Q000601:surgery; D008297:Male; D008875:Middle Aged