Microvascular invasion patterns affect survival in hepatocellular carcinoma patients after second hepatectomy.

Background: Microvascular invasion (MVI) is an important risk factor for survival of patients with hepatocellular carcinoma (HCC) after hepatectomy. However, its impact on patients with recurrent HCC who receive a second hepatectomy is unknown.
Methods: We enrolled 167 patients with HCC who underwent a second hepatectomy because of intrahepatic recurrences. We compared the patients' demographic, tumor, and pathologic characteristics with 766 cases of original hepatectomy. We analyzed the possible risk factors for survival after the first and second hepatectomies and the influence of different MVI patterns on patients' survival after the second hepatectomy.
Results: The median overall survival was comparable between the first and second hepatectomy groups, 34 (3-84) mo versus 27 (3-57) mo, P = 0.09. For patients who underwent a first hepatectomy, the presence of macro-VI or MVI, an early recurrence pattern, and a total tumor diameter >5 cm were independent risk factors. For survival after the second hepatectomy, MVI patterns that were positive-positive or negative-positive and a total recurrent tumor diameter >5 cm were significant risk factors for survival.
Conclusions: A second hepatectomy provides satisfying survival for patients with intrahepatic recurrence of HCC after the initial operation. Different MVI patterns affect survival after the second hepatectomy. Because MVI represents the biological behavior of HCC, we place a high premium on the clinical value of MVI after each hepatectomy.
(Copyright © 2016 Elsevier Inc. All rights reserved.)