Hyperprogression after immunotherapy in HNC: literature review and our experience

Checkpoint inhibitors demonstrate salutary anticancer effects, including long-term remissions. PD-L1 expression/amplification, high mutational burden, and mismatch repair deficiency correlate with response. Champiat et al for the first time described a small subset of patients that could actually have tumor growth accelerated when given PD1/PDL1-targeting agents [1].