Loose Regulatory Standards Portend a New Era of Imprecision Oncology.

Precision oncology has revolutionized the therapeutic landscape of oncology and is a goal for cancer drug development. However, lenient drug approvals by the United States Food and Drug Administration under the auspices of precision oncology are setting up this therapeutic approach to fail. In this commentary, I review two recent FDA drug approvals (pembrolizumab for tumor mutation burden-high solid tumors and olaparib for castration-resistant prostate cancer with deleterious homologous recombination repair mutations) where the FDA indication is broader than the studied population. I explain how these broad approvals stray from principles of precision oncology and can cause harm to patients.