title: [Renal clear-cell adenocarcinoma and type B lymphomatous proliferation: a fortuitous association?].
abstract: OBJECTIVE
  To discuss the potentially fortuitous occurrence of both renal carcinoma and B-cell malignant proliferation and its physiopathology.
  
  
  METHODS
  We describe a series of eight patients presenting with both diseases.
  
  
  RESULTS
  In these patients renal carcinoma was associated with either malignant non-Hodgkin lymphoma (seven cases) or multiple myeloma (one case). Of the eight patients three had both malignancies within the same renal tumor.
  
  
  CONCLUSIONS
  Though this association is unusual, it may not be fortuitous. Its physiopathology is discussed in regard to either growth factor synthesis within the renal tumor or mutations in tumor-suppressor genes.
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002292:Carcinoma, Renal Cell / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D006801:Humans; D007668:Kidney / Q000473:pathology; D007680:Kidney Neoplasms / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D016393:Lymphoma, B-Cell / Q000150:complications* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009101:Multiple Myeloma / Q000150:complications / Q000473:pathology; D009392:Nephrectomy; D014057:Tomography, X-Ray Computed