title: Association between carcinosarcoma and the transplanted kidney.
abstract: BACKGROUND
  Renal carcinosarcoma is a rare tumor with 12 reported cases in the world literature. To our knowledge, carcinosarcoma of a renal allograft has not been reported to date.
  
  
  METHODS
  A multifocal urothelial carcinosarcoma of a transplanted kidney in a 49-year-old woman is described. Genomic analysis of the extracted nuclei of all the neoplastic cells showed uniformly XY genotype proving the transplant origin of the tumor.
  
  
  RESULTS
  The carcinogenic role of immunosuppressive medications in kidney-transplanted patients is reported in the literature. In this case, immunosuppression may have promoted the carcinosarcoma.
  
  
  CONCLUSIONS
  Renal transplant patients should be monitored for the development of malignancy in the allograft and elsewhere.
authors.affiliation: Department of Urology, Medical School, University of Pécs, Germany. istvan.buzogany@aok.pte.hu
authors.forename: István
authors.initials: I
authors.lastname: Buzogány
authors.forename: Fariborz
authors.initials: F
authors.lastname: Bagheri
authors.forename: Norbert
authors.initials: N
authors.lastname: Süle
authors.forename: Tamás
authors.initials: T
authors.lastname: Magyarlaki
authors.forename: Károly
authors.initials: K
authors.lastname: Kalmár-Nagy
authors.forename: László
authors.initials: L
authors.lastname: Farkas
authors.forename: Gábor
authors.initials: G
authors.lastname: Pajor
mesh_terms: D002296:Carcinosarcoma / Q000209:etiology* / Q000473:pathology; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000209:etiology* / Q000473:pathology; D016030:Kidney Transplantation / Q000009:adverse effects* / Q000473:pathology; D008875:Middle Aged