Sex cord stromal and germ cell ovarian cancer: Is there a racial disparity?

Abstract

e18056 Background: We proposed to determine the incidence and presentation of sex cord stromal and germ cell ovarian cancers in various racial groups. Methods: Data was obtained from the United States Cancer Statistics (USCS) and National Cancer Database (NCDB) databases between 2004 and 2016. Chi-squared tests were used for statistical analyses. Results: Of 8,917 women, 48.2% were diagnosed with sex cord stromal ovarian cancer, and 52.5% had germ cell ovarian cancer. White, Black, and Asian individuals comprised 72.5%, 19.8%, and 4.16% of the population, respectively. Of the sex cord stromal tumors, 84.1% were granulosa cell, 7.9% sertoli leydig, 1.8% steroid cell, and 6.2% "other" tumors. Of the germ cell tumors, 23.3% were immature teratoma, 19.6% dysgerminoma, 10.3% yolk sac, 8.3% mixed germ cell tumor, 0.1% embryonal carcinoma, and 38.3% "other" germ cell tumor histologies. Using the UCSC database, the age-adjusted incidence of sex cord stromal was 0.50 per 100,000 for Blacks compared to 0.23 for Whites and 0.14 for Asians. The incidence for germ cell tumors was 0.40 per 100,000 in Whites, 0.46 in Blacks, and 0.44 in Asians. Using NCDB data, the proportion of sex cord stromal tumor was 5.6% in Blacks compared to 1.5% in Whites and 1.55% in Asians, and the most common histology of sex cord stromal tumors was granulosa cell tumors in every racial group. The proportion of germ cell tumors was also higher in Blacks at 4.4% compared to 2.0% in Whites and 3.9% in Asians. Of germ cell tumors, the most common histology was dysgerminoma for Whites at 22.3% and immature teratoma in Blacks and Asians at 28.0% and 26.9%, respectively. Conclusions: Our data suggest that Black women are more likely to be diagnosed with sex cord stromal tumors compared to White and Asian women. Black and Asian women also had more germ cell cancer than White women.