BAP1 and intrahepatic cholangiocarcinoma: A recent research in intrahepatic cholangiocarcinoma noted that PNI tumor with low miR-31 expression showed increased expression of BAP-1 and PBRM-1, indicating that miR-31 might repress PNI through disturbing the expression of BAP-1 and PBRM-1 [95], and delivery of agomir-31 might be an available anti-PNI therapeutic strategy in cholangiocarcinoma.