TK1 and hepatocellular carcinoma: Additionally, we found that TK1 was overexpressed in colon cancer, clear cell renal cell carcinoma, breast cancer, uterine corpus endometrial carcinoma, lung adenocarcinoma, pancreatic adenocarcinoma, head and neck squamous carcinoma, and hepatocellular carcinoma compared with normal tissue (Figure S7B–I).