Hair Repigmentation With Anti–PD-1 and Anti–PD-L1 Immunotherapy

To the Editor The article by Rivera et al is the first report of a previously undescribed side effect of checkpoint inhibitors: hair repigmentation (HR). In this significant case series of 14 patients, all patients received an anti–programmed cell death 1 (PD-1) and anti–programmed cell death 1 ligand 1 (PD-L1) antibody for the treatment of a lung cancer.

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