Introduction: Tumor necrosis has been associated with poor prognosis in hepatocellular carcinoma (HCC) patients undergoing liver resection (LR). However, more evidence is needed to clarify this issue.
Methods: Patients who underwent upfront LR between 2010 and 2018 for newly diagnosed HCC without undergoing neoadjuvant therapy were enrolled in this retrospective study. Tumor necrosis was classified as present or absent according to retrospective examinations. The association between tumor necrosis, pathologic characteristics, overall survival (OS), and recurrence-free survival (RFS) were analyzed.
Results: Among 756 patients who underwent LR for HCC, tumor necrosis was present in 279 (36.9%) patients. Compared with patients without tumor necrosis, patients with tumor necrosis had higher proportions of tumors sized >5.0 cm (P < 0.001), multiple tumors (P < 0.001), microvascular or macrovascular invasion (P < 0.001), poorly differentiated or undifferentiated tumors (P < 0.001), and T stage 3 or 4 (P < 0.001) on pathological examination. The presence of tumor necrosis was associated with worse OS and RFS compared with the absence of tumor necrosis: 5-y OS was 56% versus 78% (P < 0.001); 5-y RFS was 42% versus 55% (P < 0.001). In multivariate analysis, the presence of tumor necrosis was an independent factor associated with worse OS (hazard ratio: 1.956; 95% confidence interval: 1.409-2.716; P < 0.001) and RFS (hazard ratio: 1.422; 95% confidence interval: 1.085-1.865; P = 0.011).
Conclusions: Tumor necrosis was associated with worse OS and RFS among patients who underwent LR for HCC.
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