[MRI in cavernous transformation of the portal vein: secondary XXXX and portoportal collaterals].

@entity1 @entity253 @entity1211 @entity850
PURPOSE: Evaluation of portoportal collateral vessels and associated @entity253 in @entity1 with cavernous transformation of the portal vein by MRI. MATERIAL AND METHODS: Review of 34 MRI examinations performed on @entity1 with angiographically or MR-angiographically proven cavernous transformation. The analysis included the pattern of the portoportal collateral circulation and the abnormalities of the biliary system, such as wall thickening, @entity850 , dilations and irregularities of the extra-and intrahepatic bile ducts. RESULTS: 23 (67.6%) of 34 @entity1 with cavernous transformation had paracholedochal portoportal collateral vessels, with 22 (64.7%) showing visible luminal channels. @entity1211 could be observed in 8 (23.5%) @entity1 . 24 (70.5%) of 34 @entity1 demonstrated @entity253 due to portoportal collaterals, leading to @entity850 with dilatation of the proximal bile ducts in 8 (23.5%) @entity1 . The ductal walls were irregular in 7 (20.5%) @entity1 , and thickened in 11 (32.3%). The gallbladder wall was thickened in 4 (12.9%) @entity1 . CONCLUSION: Portoportal collaterals in @entity1 with cavernous transformation of the portal vein can be identified by MRI. These collaterals frequently alter the biliary system, which must be considered in differential diagnosis of @entity253 observed in the presence of portoportal collaterals.
