Objective To assess the diagonostic value of EUS forGI tract neuroendocrine tumors． Methods 16 cases of neuroendocrine tumors diagnosed at the First Affiliated Hospital of Guangxi Medical University from December 2002 to December 2012 were retrospectively analyzed． The feature of the EUS imaging was compared with traditional diagnostic method and evaluated the diagnostic value． Result Of the 16 Neuroendocrine tumors，7 ( 43． 8%) were in the pancreas: two in the pancreatic head，two in the pancreatic body，two in the pancreatic tail，one in the junction of head and body) ． On EUS，pancreatic neuroendocrine tumors presented as hypoechoic masses with clear margins and maybe halo-like changes ( discontinuous hyperechoic edge) ． Of the 16 Neuroendocrine tumors，6( 37． 5%) were in the rectum( mean 5． 5 cm) ． On EUS，rectal carcinoid presented as hypoechoic masses with clear margins in mucosal or submucosal lesions． Of the 16 Neuroendocrine tumors，2 ( 12． 5%) were in the stomach． On EUS，it presented as hypoechoic masses in mucosal or submucosal lesions． 1( 6． 2%) was in the left adrenal gland and it presented as anechoic shadow with median strip and thick wall in the left adrenal． 15 neuroendocrine tumors all were definitely diagnosed by pathology． 7 underwent surger; 3 underwent ESD; 2 underwent EUS-FNA; 2 underwent EMR． The accuracy rate of EUS for preoperative localization was 93． 7%． Conclusion EUS can provide accurate preoperative localization and pathologic evidence for pancreatic neuroendocrine tumors． EUS has the the value in diagnosis and guiding EMR for enteron carcinoid．

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