The results also indicated that HOXA1 was downregulated in BRCA (breast-invasive carcinoma), KICH (kidney chromophobe), OV (ovarian serous cystadenocarcinoma), PRAD (prostate adenocarcinoma), THCA (thyroid carcinoma), and UCEC (uterine corpus endometrial carcinoma) compared with adjacent non-tumor tissues (Figure 1A). Here, HOXA1 is linked to ovarian serous cystadenocarcinoma.