Pneumonitis in Patients Treated With Anti–Programmed Death-1/Programmed Death Ligand 1 Therapy

Purpose Pneumonitis is an uncommon but potentially fatal toxicity of anti–programmed death-1 (PD-1)/programmed death ligand 1 (PD-L1) monoclonal antibodies (mAbs). Clinical, radiologic, and pathologic features are poorly described. Methods Patients who received anti–PD-1/PD-L1 monotherapy or in combination with anti–cytotoxic T-cell lymphocyte associated antigen-4 mAb were identified at two institutions (Memorial Sloan Kettering Cancer Center:...