Abstract
Macroscopic vascular invasion (macroVI) is associated with poor outcomes after liver transplantation (LT) for hepatocellular carcinoma (HCC). Whether microvascular invasion (microVI) is associated with the same adverse prognosis is unclear. One hundred and fifty-five consecutive patients with confirmed HCC after LT from March 1991 to 2004 at our institution were reviewed. Patients had to satisfy Milan criteria to be accepted for LT. They were followed with surveillance images every 3 months while on the waiting list. Disease-free survival (DFS) and overall survival (OS) were evaluated by Kaplan–Meier analysis. Demographic, tumor, and histopathologic characteristics were tested for their prognostic significance. Median follow-up after LT was 30 months. Overall graft survival rates were 87, 74, and 65% at 1, 3, and 5 years, respectively. All recurrences (22/155, 14%) developed within 4 years after LT with an overall 5-year DFS of 79%. Vascular invasion, either microVI or macroVI, was more likely in patients with multicentric HCC (n ≥ 3, p < 0.001) and larger tumor size >4 cm (p = 0.04). Tumor size >5 cm (p = 0.04), advanced pathological TMN stage (p = 0.007), microVI (p = 0.001), and macroVI (p < 0.001) predicted poor tumor-free survival on univariate analysis, but only macroVI was significant in multivariate analysis (hazard ratio 54.2, 95% confidence interval 11, 266). Furthermore, only macroVI was a significant predictor of mortality after LT (p = 0.01). Macrovascular invasion is strongly associated with high rates of recurrence and diminished survival after LT whereas microVI is not an independent risk factor.
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Shah, S.A., Tan, J.C.C., McGilvray, I.D. et al. Does Microvascular Invasion Affect Outcomes After Liver Transplantation for HCC? A Histopathological Analysis of 155 Consecutive Explants. J Gastrointest Surg 11, 464–471 (2007). https://doi.org/10.1007/s11605-006-0033-7
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DOI: https://doi.org/10.1007/s11605-006-0033-7