title: Renal oncocytoma with invasive histopathologic features -  case report.
abstract: BACKGROUND
  Renal oncocytoma is an uncommon tumor, classified as a benign renal neoplasm in the World Health Organisation classification of renal tumours. Despite it there were described several reports with invasive histopathologic features.
  
  
  METHODS
  We describe a case of renal oncocytoma with bizzare cells and invasion of renal sinus fat tissue. We performed immunohistochemical analysis of the case and a review of relevant literature.
  
  
  CONCLUSIONS
  In order to set up the right dia-gnosis the perfect co- operation of clinicians and pathologists is necessary. In our opinion, in accordance with other authors, the renal oncocytomas should be considered as having a very low rather than no malignant potential, in spite of clinically benign behavior, supplementing a hypothesis, whether renal oncocytomas may be considered as a precancerous lesion of chromophobe carcinoma.
authors.forename: G
authors.initials: G
authors.lastname: Kolníková
authors.forename: P
authors.initials: P
authors.lastname: Marinová
authors.forename: V
authors.initials: V
authors.lastname: Gál
authors.forename: I
authors.initials: I
authors.lastname: Mečiarová
authors.forename: V
authors.initials: V
authors.lastname: Mišanko
authors.forename: J
authors.initials: J
authors.lastname: Rampalová
authors.forename: P
authors.initials: P
authors.lastname: Jáni
authors.forename: S
authors.initials: S
authors.lastname: Orthová
authors.forename: F
authors.initials: F
authors.lastname: Ondriaš
authors.forename: M
authors.initials: M
authors.lastname: Caňo
mesh_terms: D018249:Adenoma, Oxyphilic / Q000473:pathology* / Q000601:surgery; D000273:Adipose Tissue / Q000473:pathology; D000368:Aged; D002292:Carcinoma, Renal Cell / Q000473:pathology; D006801:Humans; D007150:Immunohistochemistry; D007680:Kidney Neoplasms / Q000473:pathology* / Q000601:surgery; D008175:Lung Neoplasms / Q000473:pathology* / Q000601:surgery; D008297:Male; D009361:Neoplasm Invasiveness; D009378:Neoplasms, Multiple Primary / Q000473:pathology* / Q000601:surgery; D011230:Precancerous Conditions / Q000473:pathology