As shown in Figure 1A, the expression level of RCSD1 in the tumor tissues of BLCA (Bladder Urothelial Carcinoma), BRCA (Breast invasive carcinoma), COAD, KICH (Kidney Chromophobe), KIRP (Kidney renal papillary cell carcinoma), LUAD, LUSC, PRAD (Prostate adenocarcinoma), READ (Rectum adenocarcinoma), STAD (Stomach adenocarcinoma), THCA (Thyroid carcinoma), and UCEC (Uterine Corpus Endometrial Carcinoma) is lower than the corresponding normal tissues. The gene discussed is RCSD1; the disease is rectum adenocarcinoma.