Abstract 4187: Racial disparities in kidney cancer incidence across South Texas, Texas, and United States using TCR, SEER and NPCR registries (2004-2014)

Abstract

Introduction: Despite overall decrease in incidence of cancers in U.S., kidney cancer is one out of the only seven cancers with increasing incidence. Limited research has been conducted using national, state-wide, and regional data, especially comparing racial and ethnic disparities in incidence and outcomes for kidney cancer. Methods: Kidney cancer incidence and outcomes from 2004 to 2014 were compared using Texas Cancer Registry, National Program for Cancer Registries, and Surveillance, Epidemiology and End Results. Age-adjusted incidence rates (per 100,000 population) and temporal trends, reporting sources, diagnosis, patient and tumor characteristics between Hispanics and Non-Hispanic Whites (NHWs) were compared for each state. The Kaplan-Meier method was used for relative survival analyses, which were limited to Texas due to data availability. Results: A total of 566,716 patients were identified. The temporal trend shows a sustained increase in kidney cancers in U.S. and a consistently higher incidence in TX and South Texas (STX) over the past decade, with Hispanics in particular having the highest annual percent change (APC) among the 20-29 year old age group (5.3 in U.S. and 7.7 in TX, respectively). Age-adjusted kidney cancer incidence was 26.2 in STX, 24.5 in TX and 21.8 in U.S. Both males and females had a higher incidence in STX and TX compared to U.S. (35.1, 32.5 vs. 29.6 for males and 18.8, 17.9 vs.15.2 for females). Overall, Hispanic males in STX had the highest kidney cancer incidence (37.7) throughout U.S. The difference in incidence rate in Hispanics compared to NHWs was significant in STX (4.9) and TX (3.4), compared to U.S. (-0.9). Tumor grade was only available in 60% of cancers in TCR compared to 70% in U.S. Despite localized tumor stage being the most common presentation for all regions, the 5-year survival was lower in Hispanics compared to NHWs in STX (68% vs. 73%) and TX (69% vs. 71%). Conclusions: Kidney cancer rates were higher in STX and TX when compared to U.S., especially among Hispanic males. Relative 5-year survival between Hispanics and NHWs were similar in TX and STX. Improvement in cancer reporting and detailed studies examining causes for racial/ethnic disparities in incidence in the top 15 states with highest disparities, especially TX, are needed. Citation Format: Casey Perez, Pankil K. Shah, Aaron Mathews, Edgar Munoz, Alex Bokov, Dharam Kaushik, Joel Michalek, Amelie Ramirez, Ronald Rodriguez, Dimpy P. Shah. Racial disparities in kidney cancer incidence across South Texas, Texas, and United States using TCR, SEER and NPCR registries (2004-2014) [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2019; 2019 Mar 29-Apr 3; Atlanta, GA. Philadelphia (PA): AACR; Cancer Res 2019;79(13 Suppl):Abstract nr 4187.