Results: The average tumor size observed on EUS is 3.5±1.5 cm; 76.9% tumor at head of pancreatic, hypoechoic structure (65.4%), irregular border (96.2%), solid tumor (92.3%); extra-tumor lesions on EUS: irregular pancreatic parenchyma (84.6%), dilated pancreatic duct (69.2%), abdominal lymph nodes (57.7%), vascular invasion (11.5%), and stage IIB accounts for 42.3%.