BACKGROUND: The purpose of this study was to assess the diagnostic value of endoscopic ultrasound (EUS) and intraductal ultrasound (IDUS) in the detection of small @entity788 . METHODS: EUS was performed in 166 @entity1 with verified @entity660 . IDUS was performed in 46 @entity1 . A microprobe was introduced into the main pancreatic duct through the papilla of Vater using the duodenoscope. RESULTS: EUS was valuable in the detection of small @entity788 . @entity420 smaller than 1 cm were demonstrated as a hypoechoic mass with a central irregular hyperechoic area. EUS and IDUS were useful in the characterization of @entity5 ( @entity5 ). EUS demonstrated nodular excrescences, and IDUS depicted papillary proliferation of the duct epithelium, which are characteristic of @entity189 and @entity652 but not of @entity1373 . Internal architecture of @entity5 was clearly depicted by EUS, and differentiation of serous and mucinous @entity5 was readily achieved. @entity5 as small as a 5-mm islet cell was demonstrated on EUS because @entity4294 are very hypoechoic. CONCLUSION: EUS and IDUS are relatively noninvasive procedures and are useful in the detection of small @entity5 and differentiation of @entity660 .

Endoscopic ultrasound and intraductal ultrasound in the diagnosis of small XXXX .

@entity1 :: ('9606', 'Species') :: ['patients'] @entity788 :: ('MESH:D010190', 'Disease') :: ['pancreatic tumors'] @entity4294 :: ('MESH:D007516', 'Disease') :: ['islet cell tumors'] @entity5 :: ('MESH:D009369', 'Disease') :: ['ductectatic mucinous tumors', 'intraductal paillary tumors', 'cystic neoplasms', 'A tumor', 'tumors'] @entity1373 :: ('MESH:D006965', 'Disease') :: ['hyperplasia'] @entity660 :: ('MESH:D010182', 'Disease') :: ['pancreatic diseases', 'pancreatic disease'] @entity189 :: ('MESH:D002277', 'Disease') :: ['carcinomas'] @entity652 :: ('MESH:D000236', 'Disease') :: ['adenomas'] @entity420 :: ('MESH:D000230', 'Disease') :: ['Ductal adenocarcinomas']
@entity788 :: (MESH:D010190,Disease) :: ['pancreatic tumors']
