Abstract
226 Background: To better understand the impact of RT on mortality, we analyzed long-term survival and patterns of excess mortality in men with stage I seminoma. Methods: 9,045 men with stage I seminoma were identified in the Surveillance Epidemiology and End Results database. Time to testicular-cancer mortality (TCM), death from second malignancy (SM), cardiovascular mortality (CVM) or suicide (SUIC) and all-cause mortality (ACM) were calculated. Survival estimates were calculated using the Kaplan-Meier method. Gender- and age-adjusted standardized mortality ratios (SMR) were calculated using U.S. population data. Cox and Fine and Gray multivariable analysis were used to evaluate the effect of RT on mortality outcomes. Results: 7,025 men (78%) received RT. After a median follow-up of 11.7 years, 869 men (9.6%) had died: sixty-five from TCM, 279 from SM, 169 from CVM and 37 from SUIC. 10-year rates of ACM and TCM were 4.24% and 0.52% among men who received RT and 7.14% and 1.22% among men who did not. Com...
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