Application of endoscopic ultrasenography in the diagnosis and treatment of pancreatic cystic neoplasms              WU Xi, YANG Ai-ming. Department of Gastroenterology,Peking Union Medical College Hospital, Peking Union Medical College, Beijing 100730,China
Corresponding author: YANG Ai-ming, E-mail：yangaiming@medmail.com.cn
Abstract    Pancreatic cystic lesions consist of inflammatory pseudoscysts and neoplastic lesions. Most pancreatic cystic lesions are asymptomatic and discovered incidentally through the routine use of crosssectional imaging tests. The differential diagnoses for cystic neoplasms include serous cystadenoma, mucinous cystic neoplasm and intraductal papillary mucinous neoplasm. The mucinous cystic lesions pose a risk of malignant degeneration. The imaging modalities, such as CT, MRCP or EUS, offer diagnostic strengths. EUS imaging play a vital role for pancreatic lesion diagnoses. The use of high frequencey imaging with EUS may provide detailed information regarding the morphology of cystic lesions, as well as the relation of the lesion and the pancreatic duct. EUS guided fine needle aspiration may improve the accuracy of EUS through the use of cystic fluid analysis. The major therapy for the mucinous neoplasms with high risk for malignancy has been surgical resection. Ethanol ablation therapy guided by EUS offers the alternative option.