title: Epithelioid angiomyolipoma presenting as an urothelial.
abstract: OBJECTIVE
  Renal angiomyolipoma is a mesenchymal neoplasm composed of dysmorphic blood vessels, smooth muscle, and adipose tissue. Epithelioidangiomyolipoma is an uncommon variant considered potentially malignant. We report a case of renal epithelioid angiomyolipoma suspicious for urothelialcarcinoma of renal pelvis.
  
  
  METHODS
  A 50-year-old woman with a 3-day history of macroscopic hematuria and CT-scan showing a tumor arising from the left renal pelvis suspicious for urothelialcarcinoma. Nephrectomy was analysed in multiple slides of hematoxilin-eosin and immunohistochemistry.
  
  
  RESULTS
  Left nephrectomy was performed. Tumor sized 8 cm and showed pathologic findings of epithelioid angiomyolipoma with a little component of classic angiomyolipoma. We studied differential diagnosis and pathologic characteristics for the prognosis.
  
  
  CONCLUSIONS
  Pathologic study in detail is fundamental for differential diagnosis and prognosis of this tumor. Our patient's pathology showed good prognosis, however follow-up is important due the malignant potential of the neoplasm.
authors.affiliation: Urology Department, Hospital Universitario Reina Sofia, Cordoba, Spain. emealcuboro@yahoo.es
authors.forename: Maria Mar
authors.initials: MM
authors.lastname: Moreno-Rodríguez
authors.forename: Fernando G
authors.initials: FG
authors.lastname: Casco
authors.forename: Teresa
authors.initials: T
authors.lastname: Caro-Cuenca
authors.forename: Beatriz
authors.initials: B
authors.lastname: Santiago-Agredano
authors.forename: J Carlos
authors.initials: JC
authors.lastname: Carrasco-Aznar
mesh_terms: D018207:Angiomyolipoma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D002277:Carcinoma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D015622:Epithelioid Cells / Q000473:pathology; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D007682:Kidney Pelvis / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D008875:Middle Aged; D009392:Nephrectomy; D014057:Tomography, X-Ray Computed