Immune-checkpoint inhibitors (ICIs) and other immunotherapies have revolutionized the treatment of patients with cancer. Nonetheless, most patients do not derive durable benefit, indicating a need for biomarkers to guide treatment selection. In this Review, the authors describe the role of antigen presentation in response to ICIs and other immunotherapies, with a focus on the role of molecular and/or genomic alterations affecting antigen presentation.

Many studies attempting to identify biomarkers for predicting of immune-checkpoint inhibitor (ICI) efficacy have led to the description of Gut OncoMicrobiome Signatures (GOMS). Several GOMS support an association between oncogenesis and intestinal dysbiosis, and other GOMS are shared between patients with several cancer subtypes and individuals with seemingly unrelated chronic inflammatory disorders. The authors of this Review discuss these patterns as well as the findings from a meta-analysis of GOMS associated with clinical benefit from ICIs, and propose practical guidelines to incorporate GOMS in decision-making in immuno-oncology.

Lung cancer is the commonest cancer globally. Reflecting patterns of smoking and other risk factor exposures, both the incidence of and mortality from lung cancer are highest in economically developed countries. Nonetheless, developing and less economically developed countries are likely to have the biggest increases in lung cancer in the coming years. In this Review, the authors describe the global epidemiology of lung cancer, and how changes in exposures, socioeconomic status, public health interventions and better treatment strategies are influencing both the incidence of and mortality from lung cancer.

Despite advances in drug development for patients with lymphoma over the past decades, the identification of biomarkers for treatment selection remains an unmet need. The authors of this Review provide an overview of quantitative PET-based biomarkers in this patient population and discuss the challenges and opportunities in the integration of these biomarkers in clinical trials and the routine management of patients with lymphoma.

In 2023, a decade after granting Accelerated Approval to the first-in-class BTK inhibitor ibrutinib for the treatment of mantle cell lymphoma, the FDA requested this indication be withdrawn. Herein, we discuss the seemingly inconsistent results from the SHINE and TRIANGLE trials, which relate to the distinct patient populations of these trials, and posit that regulatory approaches should take these nuances into account.