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Cancer risk

Cancer risk increases after kidney graft

Tuesday, January 02, 2007 by: Jerome Douglas
Tags: cancer risk, organ transplants, health news

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(NaturalNews) A study of 28,855 end-stage renal disease patients who received kidney transplants found a slight but significant increase in risk of cancer during dialysis. Additionally, most of these cancers are those with known or suspected viral causes, according to epidemiologist Claire M.Vajdic, Ph.D.

University of New South Wales' Dr. Vajdic reported her findings in the Dec. 20 issue of the Journal of the American Medical Association. Her research indicated that following transplantation, there was a significant increase in risk of cancer.

Immune suppression after transplantation is recognized as a risk factor for non-melanoma skin cancer, non-Hodgkin's lymphoma, and Kaposi's sarcoma, but Dr. Vajdic and colleagues said it had been assumed that there was no increase in other cancers. Dr. Vajdic noted that this issue had never been studied in a large population with long-term follow-up.

There were 1,236 observed cancers in patients who received kidney transplants, excluding non-melanoma skin cancer, non-Hodgkin's lymphoma, and Kaposi's sarcoma. The team only expected to find 378 cases.

The study performed by Dr. Vajdic was limited by some specifics, such as the need to retrospectively define the "period before transplantation." This may have caused an underestimation of the incidence of cancer, because some patients may not have been referred for transplant because of their cancer history. In addition, the heightened cancer surveillance in the transplant population may also have introduced bias.


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