title: A rare case of renal oncocytoma associated with erythrocytosis: case report.
abstract: BACKGROUND
  Oncocytomas are benign tumors of the kidney that are usually diagnosed postoperatively due to differential diagnostic problems from renal cell carcinoma. Although the latter are neoplasms that have been associated with erythrocytosis in 3.5% of cases, there are no reports in the literature about a similar occurrence in oncocytomas.
  
  
  METHODS
  In this case report we present a unique case of a right lower pole oncocytoma associated with erythrocytosis. Erythrocytosis subsided after partial nephrectomy.
  
  
  CONCLUSIONS
  Erythrocytosis can sometimes occur in association with renal oncocytomas.
authors.affiliation: Aristotle University of Thessaloniki, 1st Department of Urology, Ethnikis Amynis 41, 54635 Thessaloniki, Greece. urolauth@med.auth.gr
authors.forename: Demetrios
authors.initials: D
authors.lastname: Radopoulos
authors.forename: Konstantinos
authors.initials: K
authors.lastname: Tzakas
authors.forename: Anastasios
authors.initials: A
authors.lastname: Tahmatzopoulos
mesh_terms: D018249:Adenoma, Oxyphilic / Q000150:complications* / Q000175:diagnosis* / Q000601:surgery; D000328:Adult; D006801:Humans; D007680:Kidney Neoplasms / Q000150:complications* / Q000175:diagnosis* / Q000601:surgery; D008297:Male; D011086:Polycythemia / Q000150:complications* / Q000175:diagnosis*