To Analyze Diagnostic Value Of Ultrasonography In Extrahepatic Cholangiocarcinoma

Objective: To explore the application value of ultrasonography (US) in the diagnosis of extrahepatic cholangiocarcinoma.Methods: 44 patients with extrahepatic cholangiocarcinoma were confirmed by operation and pathological results. All of them were examined by US, Their sonogram were analyzed retrospectively. 19 cases out of them were examined by MRCP. The imaging features of two methods, diagnosis and pathological results during operation were analyzed comparatively.Results: Etrahepatic cholangiocarcinoma was classified lump phenotype ( papillary or bolus phenotype ) and non-lump phenotype ( cut-off or stricture phenotype) by Ultrasonography. 34 cases were lump phenotype; 3 cases were non-lump phenotype. Etrahepatic cholangiocarcinoma was classified strong, moderate, low-level echo according to echo intensity. Most of them were moderate, low-level echo. Etrahepatic cholangiocarcinoma was classified superior segment, intermediate segment, inferior segment, suffusion phenotype according to tumorigenic location. 27 cases were superior segment, 15 cases were intermediate segment and inferior segment, 2 cases were suffusion phenotype. The accuracy rates of localization diagnosis and quality diagnosis in US were 88.6% (39/44) and 84.1% (37/44) respectively; The accuracy rates of localization diagnosis and quality diagnosis in MRCP were 94.7% (18/19) and 89.5% (17/19) respectively. The disparation of their localization and quality diagnosis accuracy rates weren't statistically significant in extrahepatic cholangiocarcinoma.