Lili Jing1, Qinghua Cao1, Jun Li2. 1. Department of Pathology, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, 264100, Shandong, China. 2. Department of Radiology, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, 264100, Shandong, China. bzmceducn@sina.com.