Renal carcinoma following therapy for cancer in childhood: A report from the Childhood Cancer Survivor Study.

9528 Background: Limited data exists describing the incidence of and risk factors for subsequent renal carcinoma among long-term survivors of childhood cancer. Methods: The study included 14,351 five-year survivors of childhood cancer diagnosed between 1970 and 1986 who participated in the Childhood Cancer Survivor Study. Chemotherapy and radiotherapy exposures were abstracted from medical records; total dose of radiation to the renal beds was estimated by a radiation physicist. Standardized incidence ratios (SIRs) were calculated using age-, sex-, and calendar-specific incidence data from the Surveillance, Epidemiology and End Results (SEER) program. Cumulative incidence was calculated treating death as a competing risk. Poisson regression analyses were used to assess associations between diagnosis and treatment characteristics and the risk of subsequent renal carcinoma while adjusting for changes in risk due to age. Results: Twenty-six survivors were diagnosed with a renal carcinoma at a median follow-u...