URGCP and hepatocellular carcinoma: Studies have shown that high levels of URG4 protein have been found in many solid tumors and are involved in tumorigenesis and tumor development, including hepatocellular carcinoma [6], gastric cancer [7], ovarian cancer [8], glioblastoma [9], glioma [10], breast carcinoma [11], non-small-cell lung cancer [12], and nasopharyngeal cancer [13].