Patients with end-stage renal ideas who are being kept alive by kidney dialysis have an 18 percent high risk of developing any type of cancer than do members of the general population. A study reported July 9 in The Lancet examined the records of more than 800,000 patients in Australia, Europe, New Zealand and the United States. Of patients who had been on dialysis but who had never had kidney transplants, 3 percent developed cancer within an average of 2.5 years of follow-up, compared to a rate of 2.6 percent in a similar sample of the general public. The cancer risk was especially high in-patients under age 35, and was higher for certain types of cancers, such as those of the bladder, cervix, kidney, thyroid and uterus.