Impact of Des-Gamma-Carboxy Prothrombin and Tumor Size on the Recurrence of Hepatocellular Carcinoma After Living Donor Liver Transplantation

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Backgrounds.Because many patients who did not meet the Milan criteria have survived long after undergoing living donor liver transplantation (LDLT), extended criteria for recipient with hepatocellular carcinoma (HCC) are therefore considered to be necessary.Methods and Results.A total of 90 consecutive adult LDLT recipients with HCC between 1996 and 2007 were reviewed. The recurrence-free survival rates of all 90 patients were 86.0%, 81.3%, and 81.3% at 1, 3, and 5 years, respectively. Fourteen of 90 patients developed a recurrence of tumor after the LDLT. The tumor recurrences were diagnosed within 1 year after the LDLT in 11 (78.6%) patients. In a multivariate analysis, both the tumor size of less than 5 cm (P=0.0202) and the des-gamma-carboxy prothrombin (DCP) level of less than 300 mAU/mL (P=0.0001) were found to be favorable independent factors for the recurrence of HCC after LDLT. Therefore, the authors devised new selection criteria for HCC patients (a tumor size of <5 cm or a DCP of <300 mAU/mL). The 1-, 3-, and 5-year overall or recurrence-free survival rates of the 85 patients who met the new criteria were 92.3%, 85.9%, and 82.7%, or 90.5%, 87.0%, and 87.0%, respectively, which were significantly different from those of the five patients who did not meet the new criteria (P<0.0001).Conclusions.A combination of two factors, namely the tumor size and the DCP level, was found to be useful for expanding the selection of LDLT candidates for HCC.

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