Nevena Damjanov, MD
Treatment of patients with hepatocellular carcinoma (HCC) requires a multidisciplinary approach. This month we will review articles that analyze outcomes after liver resection compared to percutaneous ablation, prediction of immunotherapy efficacy based on observed treatment-related side effects, and the risk of subsequent malignancies in patients with HCC.
Xie et al . reported their retrospective review of outcomes of 67 adults with resectable caudate HCC within Milan criteria. Out of these, 46 underwent hepatic resection and 21 underwent percutaneous ablation. Overall survival at 1, 3, and 5 years was 97.6%, 83.6%, and 71.5%, respectively, for the hepatic resection patients, vs 89.4%, 58.5%, and 48.8%, respectively, for the percutaneous ablation patients (P = 0.032). Recurrence-free survival at these time points was 77.6%, 47.9%, and 42.6%, respectively, for the hepatic resection group, and 40.5%, 23.2%, and 15.4%, respectively, for the percutaneous ablation group (P = 0.010). The investigators concluded that HCC patients who underwent hepatic resection had significantly higher rates of recurrence-free and overall survival compared to those who underwent percutaneous ablation.
For those patients with unresectable HCC, systemic immune checkpoint inhibitor therapy is now part of the standard of care. Treatment-associated adverse events occur in over half of patients treated with immunotherapy. Pinato et al . reviewed the outcomes of a cohort of 406 adults with unresectable or advanced HCC who were receiving immune checkpoint inhibitor therapy while enrolled in clinical trials that were submitted to the Food and Drug Administration. the development of adverse events was associated with longer overall survival and progression-free survival rates compared to patients who did not develop treatment-related adverse events (16.7 months vs 11.2 months; 5.5 months vs 2.2 months, respectively). The authors concluded that the development of treatment-related adverse events was significantly correlated with improve overall and progression-free survival in HCC patients treated with ICI monotherapy in clinical trials.
Finally, Kong et al . retrospectively looked at a cohort of 40,314 adult patients diagnosed with HCC between 2000 and 2014 in the SEER database, identifying the incidence of second primary cancers. Overall, the patients were followed for a median of 19 months following their HCC diagnosis. A total of 1,593 HCC patients (3.95%) developed secondary primary malignancies starting at 2 months after their initial HCC diagnosis. The 3-, 5-, and 10-year cumulative incidence of developing second primary malignancies were 2.35%, 3.12%, and 4.51%. The top five sites of the second primary malignancies were lung and bronchus, prostate, non-Hodgkin lymphoma, colon, and breast. The patients with poorer tumor-related characteristics such as larger tumor size, vascular invasion, positive AFP level, poorer tumor grade, and distant extension were associated with a decreased risk of developing second primary cancers, most probably because of their higher risk of dying from HCC. The authors developed a competing-risk nomogram for the purpose of improving guideline surveillance and further management of HCC survivors, concluding that HCC survivors should be monitored for evidence of secondary primary cancers.