
Distinct Roles of HHLA2 and PD-L1 in the Immune Cell and Prognosis of Hepatocellular Carcinoma
Introduction Hepatocellular carcinoma (HCC) accounts for 90% of all primary liver tumors and is considered to be the second most frequent cancer in the world.1 HCC is the second most common cause of cancer-related death and the fourth most prevalent …