AIM: To retrospectively analyze the computed tomography (CT) and magnetic resonance imaging (MRI) appearances of primary @entity1358 of the liver (PCCCL) and compare the imaging appearances of PCCCL and @entity157 ( @entity157 ) to determine whether any differences exist between the two groups. METHODS: Twenty cases with pathologically proven PCCCL and 127 cases with @entity157 in the Second Affiliated Hospital of Sun Yat-sen University were included in this study. CT or MRI images from these @entity1 were retrospectively analyzed. The following imaging findings were reviewed: the presence of @entity1575 , @entity5 size, the enhancement pattern on dynamic contrast scanning, the presence of pseudo capsules, @entity5 rupture, portal vein @entity715 and @entity1600 . RESULTS: Both PCCCL and @entity157 were prone to occur in @entity1 with @entity1575 , the association rate of @entity1575 was 80.0% and 78.7%, respectively (P > 0.05). The mean sizes of PCCCL and @entity96 were (7.28    4.25) cm and (6.96    3.98) cm, respectively. Small HCCs were found in 25.0% (5/20) of PCCCL and 19.7% (25/127) of @entity157 cases. No significant differences in mean size and ratio of small HCCs were found between the two groups (P = 0.658 and 0.803, respectively). Compared with @entity157 @entity1 , PCCCL @entity1 were more prone to form pseudo capsules (49.6% vs 75.0%, P = 0.034). @entity5 rupture, typical @entity157 enhancement patterns and portal vein @entity5 @entity715 were detected in 15.0% (3/20), 72.2% (13/18) and 20.0% (4/20) of @entity1 with PCCCL and 3.1% (4/127), 83.6% (97/116) and 17.3% (22/127) of @entity1 with @entity157 , respectively. There were no significant differences between the two groups (all P > 0.05). No @entity1 with PCCCL and 2.4% (3/127) of @entity1 with @entity157 showed signs of @entity1600 (P > 0.05). CONCLUSION: The imaging characteristics of PCCCL are similar to those of @entity157 and could be useful for differentiating these from other @entity96 (such as @entity2695 and @entity99 ). PCCCLs are more prone than CHCCs to form pseudo capsules.

XXXX in the liver: CT and MRI findings.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity96 :: ('MESH:D008113', 'Disease') :: ['liver tumors', 'CHCC tumors'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'Tumor'] @entity2695 :: ('MESH:D006391', 'Disease') :: ['hemangioma'] @entity1600 :: ('MESH:D014388', 'Disease') :: ['lymph node metastasis'] @entity1358 :: ('MESH:D002292', 'Disease') :: ['clear cell carcinoma'] @entity1575 :: ('MESH:D008103', 'Disease') :: ['liver cirrhosis'] @entity157 :: ('MESH:D006528', 'Disease') :: ['HCC', 'CHCC', 'common type hepatocellular carcinoma'] @entity99 :: ('MESH:D056486', 'Disease') :: ['hepatic metastases'] @entity715 :: ('MESH:D013927', 'Disease') :: ['thrombosis']
@entity1358 :: (MESH:D002292,Disease) :: ['Primary clear cell carcinoma']
