TMPRSS2 and thyroid gland carcinoma: However, the expression of TMPRSS2 was lower in BRCA (breast invasive carcinoma), KICH (kidney chromophobe), LIHC (liver hepatocellular carcinoma), PRAD (prostate adenocarcinoma), STAD (stomach adenocarcinoma), and THCA (thyroid carcinoma) (Figure 1B).