title: [Epidemiologic analysis of clear cell and chromophilic carcinoma of the kidney].
abstract: OBJECTIVE
  Finding differences in the characteristics of the two most frequent variants of renal cancers: the clear-cell renal carcinoma, and the chromophilic one.
  
  
  METHODS
  Retrospective analysis of epidemiological characteristics of patients diagnosed of renal carcinoma in our hospital between 1991 and 2001. Statistical differences were searched between patients' characteristics (age, sex, smoking habitus) and tumors' characteristics (size, focality, stage, side and grade).
  
  
  RESULTS
  Sixty six renal tumors were diagnosed, of which 41 (62.1%) were clear-cell tumors and 9 (13%) were chromophilic. We only found statistical differences between both subpopulations' tumor size (p < 0.05), being greater for clear-cell tumors (7 +/- 3.92 cm) than for chromophilic ones (4.89 +/- 1.96 cm). We could also appreciate a bias towards a less advanced stage of the chromophilic type, although not statistically significant.
  
  
  CONCLUSIONS
  Clear-cell renal carcinoma and chromophilic renal carcinoma are the two more frequent variants of renal tumors. The chromophilic type is smaller and is usually found in a less advanced stage, although this bias could not be demonstrated in our series.
authors.affiliation: Servicio de Urología, Hospital Universitario de Getafe, Madrid.
authors.forename: J M
authors.initials: JM
authors.lastname: Gómez de Vicente
authors.forename: L
authors.initials: L
authors.lastname: Llanes González
authors.forename: D
authors.initials: D
authors.lastname: Santos Arrontes
authors.forename: V
authors.initials: V
authors.lastname: Chiva Robles
authors.forename: I
authors.initials: I
authors.lastname: Romero Cagigal
authors.forename: E
authors.initials: E
authors.lastname: Redondo González
authors.forename: A
authors.initials: A
authors.lastname: Berenguer Sánchez
mesh_terms: D018262:Adenocarcinoma, Clear Cell / Q000453:epidemiology* / Q000473:pathology; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000453:epidemiology* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies
vernacular_title: Análisis epidemiológico del carcinoma renal de células claras y cromofílico.