title: [A retrospective analysis of ultrasonic diagnosis for 360 cases of extrahepatic obstructive jaundice].
abstract: OBJECTIVE
  To retrospectively analyze the ultrasonic diagnosis of extrahepatic obstructive jaundice, discuss their ultrasonographic characteristics, technical procedures and misdiagnostic reasons and improve the diagnostic proficiency and qualitative accuracy of extrahepatic obstructive jaundice.
  
  
  METHODS
  Retrospective analyses were conducted for the causes, obstructive sites and ultrasonic characteristics of 360 cases of extrahepatic obstructive jaundice confirmed by surgical pathology during 10 years, including choledocholithiasis (n = 205), cholangiocarcinoma (n = 30), pancreatic head carcinoma (n = 44), gall bladder (n = 27), ampullary carcinoma (n = 24), cholangitis (n = 24) and biliary tract roundworm (n = 6).
  
  
  RESULTS
  For locating extrahepatic obstructive jaundice, the accuracy of ultrasonic diagnosis was 93.6% and that of qualitative diagnosis 87.5%.
  
  
  CONCLUSIONS
  As an economic, rapid, safe and noninvasive tool, ultrasound is valuable in the diagnosis of extrahepatic obstructive jaundice. It may be applied frequently in non-contraindicated and complication-free patients. However, the diagnostic accuracy is closely correlated with inspector experiences, operative techniques and patient conditions.
authors.affiliation: Department of Ultrasound, Affiliated Xuanwu Hospital, Capital Medical University, Beijing 100053, China.
authors.forename: Ling
authors.initials: L
authors.lastname: Wang
authors.affiliation: Department of Ultrasound, First Affiliated Hospital, Zhengzhou University, Zhengzhou 450052, China. Email: hsh1852@126.com.
authors.forename: Shaohua
authors.initials: S
authors.lastname: Hua
mesh_terms: D014670:Ampulla of Vater; D001650:Bile Duct Neoplasms; D001653:Bile Ducts, Intrahepatic; D018281:Cholangiocarcinoma; D042883:Choledocholithiasis; D003138:Common Bile Duct Neoplasms; D006801:Humans; D041781:Jaundice, Obstructive; D010190:Pancreatic Neoplasms; D012189:Retrospective Studies; D014465:Ultrasonics