Abstract: Pancreatic cancer is a malignant tumor with poor prognosis,  high mortality and low survival rate  of  five  years.It is mainly because that most patients with pancreatic cancer progress to either metastatic or locally advanced  disease in the asymptomatic stage,  while the prognosis of  patients diagnosed early and treated with interventional therapy is relatively good.Endoscopic ultrasonography and its related technologies can do a  closerange multiaxial ultrasound scanning of the pancreas and biliary system,  which plays a vital role in early detection,  staging and preoperative evaluation,  differential and pathological diagnosis of pancreatic cancer.

Key words: pancreatic neoplasms； endoscopic ultrasonography, diagnosis