title: Colorectal cancer after renal transplantation.
abstract: BACKGROUND
  The risk of developing malignancy is increased after transplantation, which is believed to be related to the use of immunosuppressive agents. Although the risk of hematological malignancies and skin cancer are clearly increased in this setting, the association with colorectal cancer is controversial.
  
  
  METHODS
  Retrospective analysis of patients with renal transplantation who developed colorectal cancer (1985-2001).
  
  
  RESULTS
  Over 17 years (1985-2002), 31 (5.5%) patients out of 556 renal transplant recipients developed cancer; 23 skin cancer and 8 non skin cancer. Three patients (0.5%) developed colorectal cancer. All were men of mean age 65 years. The mean elapsed time from transplantation to symptoms was 11 years. They were all treated with azathioprine, antilymphocyte globulin, prednisone, and additional immunosuppressive agents, such as mycophenolate mofetil, or cyclosporine. The patients with colorectal cancer underwent resection with primary anastomosis. They all experienced uneventful postoperative courses; no anastomotic leak occurred. Two patients were found to have liver metastases at the time of operation.
  
  
  CONCLUSIONS
  Our cases and a literature review suggest that there is no increase risk of colorectal cancer among transplant recipients compares to the general population. Whether colorectal cancer has a more aggressive course in transplant patients needs further evaluation.
authors.affiliation: Division of Transplantation, Department of Surgery, University of Tennessee Medical Center at Knoxville, Knoxville, Tennessee, USA. rfsaidi@hotmail.com
authors.forename: R F
authors.initials: RF
authors.lastname: Saidi
authors.forename: P S
authors.initials: PS
authors.lastname: Dudrick
authors.forename: M H
authors.initials: MH
authors.lastname: Goldman
mesh_terms: D000368:Aged; D003110:Colonic Neoplasms / Q000175:diagnosis / Q000601:surgery; D006801:Humans; D016030:Kidney Transplantation / Q000009:adverse effects*; D008875:Middle Aged; D011183:Postoperative Complications / Q000453:epidemiology; D012189:Retrospective Studies; D012307:Risk Factors; D012878:Skin Neoplasms / Q000453:epidemiology