APOBEC3C and rectum adenocarcinoma: High A3C expression was found in CHOL, GBM, KIRC, and kidney renal papillary cell carcinoma (KIRP), while exhibiting low expression in COAD, rectum adenocarcinoma (READ), prostate adenocarcinoma (PRAD), uterine corpus endometrial carcinoma (UCEC), BRCA, and kidney chromophobe (KICH).