PURPOSE: To determine the two-phase (hepatic arterial phase [HAP] and portal venous phase [ @entity12468 ]) spiral computed tomographic (CT) findings of a nontumorous arterioportal shunt in the cirrhotic liver that can mimic a @entity5 . MATERIALS AND METHODS: For 14 months, 803 @entity1 with known or suspected @entity157 were referred for initial or repeated transcatheter arterial chemoembolization (TACE). Twenty-nine hyperattenuating lesions on HAP CT images obtained in 25 @entity1 (23 @entity1 , two @entity1 ; age range, 39-70 years) were regarded as nontumorous arterioportal shunts and were included in this study. The diagnosis of nontumorous arterioportal shunt was established by four radiologists who reviewed the two-phase spiral CT images and hepatic angiograms. RESULTS: The longest dimension of the lesion was 1.0-7.9 cm (mean dimension, 2.9 cm). The morphology at HAP CT was wedge-shaped in 25 (86%), geographic (ie, focal area with irregular outline) in two (7%), and nodular in two (7%) lesions. All lesions were homogeneous in attenuation. @entity2383 that represented early opacification of portal veins were demonstrated during the HAP in nine (31%) lesions. @entity12468 CT images showed these lesions as isoattenuating (n = 20 [69%]) or slightly hyperattenuating (n = 9 [31%]). Iodized oil CT images showed faint or no accumulation of iodized oil in all lesions. CONCLUSION: In cirrhotic liver, nontumorous arterioportal shunts can be a cause of pseudolesions that @entity5 at two-phase spiral CT. Lesions that have the typical wedge-shaped and homogeneous appearance with or without internal linear branching structures during the HAP and that are isoattenuating or slightly hyperattenuating during the @entity12468 can suggest this unusual condition.

Nontumorous arterioportal shunt mimicking XXXX in cirrhotic liver: two-phase spiral CT findings.

@entity1 :: ('9606', 'Species') :: ['women', 'patients', 'men'] @entity5 :: ('MESH:D009369', 'Disease') :: ['hypervascular tumor', 'mimic hypervascular tumors'] @entity12468 :: ('CHEBI:53245', 'Chemical') :: ['PVP'] @entity157 :: ('MESH:D006528', 'Disease') :: ['hepatocellular carcinoma'] @entity2383 :: ('MESH:D028361', 'Disease') :: ['Hyperattenuating linear branching structures']
@entity5 :: (MESH:D009369,Disease) :: ['hypervascular tumor']
