HS6ST2 and uterine corpus endometrial carcinoma: In contrast, tumor tissues had lower levels of HS6ST2 than healthy tissues in breast invasive carcinoma (BRCA), kidney renal papillary cell carcinoma (KIRP), uterine corpus endometrial carcinoma (UCEC), kidney renal clear cell carcinoma (KIRC), and kidney chromophobe (KICH) (Fig. 1A).