Li Wang1, Chuying Huang1, Xibiao Yang2, Huajing Xiao3, Liqun Zou1. 1. Department of Medical Oncology, West China Hospital, Sichuan University, Sichuan Province, China. 2. Department of Radiology, West China Hospital, Sichuan University, Sichuan Province, China. 3. Department of Pathology, Panzhihua Central Hospital, Sichuan Province, China.