Hepatocellular carcinoma (HCC) associated with hepatitis B infection can arise in non-cirrhotic liver. The primary oncogenic mechanism of HBV in this setting is:

• A Insertional mutagenesis by HBV DNA integrating near TERT and MYC, plus HBx protein trans-activating oncogenes and disrupting p53 function ✓
• B Direct cytolysis by HBV inducing chronic regeneration alone
• C HBsAg accumulation in ER causing oxidative stress without genomic integration
• D HBV exclusively causes HCC through cirrhosis-mediated regenerative nodules

Explanation

HBV causes HCC in non-cirrhotic livers through direct oncogenic mechanisms: HBV DNA integrates into the host genome (frequently near TERT promoter and MYC locus), causing insertional mutagenesis. The viral HBx protein is a transcriptional activator that upregulates oncogenes, inhibits p53 tumor suppressor function, and activates Wnt/beta-catenin signaling. This explains why HBV-associated HCC can arise without advanced fibrosis or cirrhosis, in contrast to HCV-associated HCC which requires cirrhosis in most cases.

Reference: Robbins & Cotran Pathologic Basis of Disease, 10th ed.

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Written and medically reviewed by the StethoPrep medical team.