DIFFERENTIATION OF HYPERVASCULAR HEPATIC PSEUDOLESIONS FROM HEPATOCELLULAR-CARCINOMA - VALUE OF SINGLE-LEVEL DYNAMIC CT DURING HEPATIC ARTERIOGRAPHY

Purpose: The purpose of our study was to assess the efficacy of single -level dynamic CT during hepatic arteriography (D-CTA) in the differen tiation between hypervascular hepatocellular carcinoma (HCC) and hyper vascular pseudolesion. Method: D-CTA was performed in nine cases with HCC and nine cases with pseudolesion. Findings on D-CTA were retrospec tively analyzed. Results: The transition of the stain of pseudolesion on D-CTA was divided into three phases: (1) inflow of the contrast mat erial into the portal vein within the lesion, (2) lesion staining, and (3) fading out of the stain; that of HCC was divided into four phases : (3) inflow of CM into tumor, (2) tumor staining, (3) inflow of CM in to the adjacent liver, and (4) coronal stain of adjacent liver. The co ronal stain was seen in all HCCs but not in any pseudolesions. Conclus ion: The present study suggests that D-CTA is a helpful option in the differentiation between HCC and pseudolesion.