Anastrozole-fulvestrant in breast cancer and daily aspirin to prevent HCC

The study – “Association of Daily Aspirin Therapy With Risk of Hepatocellular Carcinoma in Patients With Chronic Hepatitis B” – was published in JAMA Internal Medicine (doi: 10.1001/jamainternmed.2018.8342).

Although there were more impressive reductions in relative risk of HCC among statin and antinucleoside analogue users, the authors highlighted that HCC developed in 5.20% of the approximately 2,100 chronic aspirin users and in 7.87% of nonusers – a 29% relative reduction in risk in this cohort study. Toxicity, including upper GI bleeding, was low.

What this means in practice

This is a hypothesis-generating analysis at best. Although the authors highlight possible mechanisms by which aspirin use could lead to reduction in HCC among patients with chronic inflammatory conditions affecting the liver, the study produces more questions than it answers (dose, chronicity of use, duration of protection, biomarkers for benefit).

Owing to the simplicity and low cost of the intervention, it may be worth studying prospectively in chronic HBV-infected patients and other populations at risk for HCC, but the intervention should not be adopted at this point based on an international cohort study.

The practicality of conducting such a large, complicated, prospective study of a widely available medication that has widely publicized additional health benefits is an open question.

When I see my next patient with a high risk for HCC, I won’t prescribe aspirin for chemoprevention.

Dr. Lyss has been a community-based medical oncologist and clinical researcher for more than 35 years, practicing in St. Louis. His clinical and research interests are in the prevention, diagnosis, and treatment of breast and lung cancers, and in expanding access to clinical trials to medically underserved populations.