Duncan transplant patient loses drug benefit NewsOK.com, OK - The Arizona man died following a motorcycle crash; his kidney and pancreas now belong to Mike Reddin. But in August, three years after his double-transplant...
Pregnant, two kids under five... and cancer. What would you do? guardian.co.uk, UK - Nov 29, 2008 The boy suffered a host of defects including a deformity of the right arm, kidney abnormalities and heart problems. At age 11, he developed thyroid cancer...
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Cancer risk rises after kidney transplant, study says
Last Updated: 2006-12-20 8:40:49 -0400 (Reuters Health)
By Will Dunham
WASHINGTON - People who have had kidney transplants face a big increase in risk for a variety of cancers, particularly those caused by a virus, according to a study published on Tuesday.
The researchers, writing in the Journal of the American Medical Association, tracked cancer incidence from 1982 to 2003 in nearly 29,000 Australians who got kidney transplants after serious kidney disease.
They excluded nonmelanoma skin cancer and cancers already known to lead to end-stage kidney disease, and found that the patients experienced an overall cancer risk nearly 3.3 times higher after getting a kidney transplant than before.
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"We found that cancer incidence is markedly increased after kidney transplantation but is only slightly increased in the 5 years prior to and during dialysis," Claire Vajdic of the University of New South Wales in Sydney, lead author of the study, said by e-mail.
"After transplantation, the increase in risk affects a broader than previously appreciated range of cancers across a number of organ systems."
Vajdic said the findings do not challenge the life-saving value of kidney transplantation for people with end-stage renal disease, noting the risk of dying is four times higher in patients remaining on dialysis than in those who get a transplant.
The study found that the risk for 18 different kinds of cancer increased by at least three-fold, and 13 of these cancers are known or suspected to have a viral cause.
Five of these cancers, affecting the tongue, mouth, vulva, vagina and penis, are caused by the human papillomavirus, the study said, and there are indications the same virus is responsible in four of the others -- cancers of the eye, salivary gland, esophagus and nasal cavity.
Vajdic said the new human papillomavirus vaccine could help reduce the risk of cancer among these transplant patients.
Immune system suppression, rather than the organ transplantation itself, is most likely responsible for the increase in cancer risk, Vajdic said.
Vajdic said patients who get a kidney transplant take medications that help prevent rejection of the organ by suppressing the immune system, the body's natural defense. But these drugs also yield an increased susceptibility to infection, and can awaken previously dormant viral infections.
"The hypothesis is that the immune suppression results in chronic viral infection which leads to cancer," Vajdic said.
