The Value Of MR Scanning In The Diagnosis And Preoperative Evaluation Of Hepatic Hilar Common Carcinomar

[Objective]To investigate the value of MR scanning in the diagnosis and preoperative evaluation of hepatic hilar carcinomar。[Methods]The appearance of MRI in 52 cases of hepatic hilar carcinomar was analyzed,including hepatocellular carcinoma(HCC,n = 8),hilar cholangiocarcinoma(HC,n=24),hilar metastasis(n = 12),and hemangioma(n=8)。MRI scanning besides the precontrast MRI,MRCP,dynamic contrast-enhanced MR scanning and 3D DCE-MRA。MRI appearance was compared with the results of pathology or surgery or other imaging data。[Results](1)MRCP could confirm the level of bile duct obstruction with accuracy of 90.4%(47/52)。(2)HC group enhanced in portal vein or delayed period(19/24 79.2%),and half of HCC group began to enhance in arterial period,but disappeared to enhance in portal vein period,and the contrast type of metastasis was various,whereas hemangioma enhanced in arterial and portal vein and delayed period(6/8,,75%)。(3)The portal vein invasion in HC group showed portal vein infiltration(9/48,18.6%), portal vein occlusion(11/48,22.9%),occlusion by tumor thrombosis。all metastasis showed infiltration or central narrowing only in 3 branchs of portal vein。Hemangioma group showed compression and displacement(8/16,50%)。(4)Three kinds of MRI scanning method:[1]precontrast +MRCP;[2]"1" + dynamic contrast-enhanced scanning;[3]"2"+3D DCE-MRA,the accuracy of three kinds of scanning method in qualitative diagnosis of all cases was 53.8%,71.2%,80.8%, respectively。The accurracy of combined application of MR scanning in preoperative evaluation in hepatic hilar tumor was 77.5%(31/40)。[Conclusion]:The accuracy of MRCP which confirm the level of bile duct obstruction is higher,3D DCE-MRA could show the change of portal vein,the combined application of MR scanning-method,including precontrast MR,MRCP, dynamic contrast-enhanced MR scanning,3D DCE-MRA,could give more accurate information about diagnosis of locational and qualitative and preoperative evaluation in different type of of hepatic hilar tumor than a single scanning-method。...