Original Article A new classification for hepatocellular carcinoma with hepatic vein tumor thrombus Zhen-Hua Chen, Kang Wang, Xiu-Ping Zhang, Jing-Kai Feng, Zong-Tao Chai, Wei-Xing Guo, Jie Shi, Meng-Chao Wu, Wan Yee Lau, Shu-Qun Cheng