To provide a pharmaceutical composition for use in a method of treating
lung cancer.SOLUTION: Provided is a pharmaceutical composition for use in a method of treating
lung cancer or increasing the survival of a patient with
lung cancer, the pharmaceutical composition comprising an isolated
antibody or an
antigen-binding fragment thereof that binds specifically to
programmed death 1 (PD-1), the method comprising: (a) selecting a patient having non-
small cell lung cancer; (b) measuring expression of
programmed death ligand 1 (PD-L1) in
lung cancer tumor tissue of the patient; and (c) if the
tumor tissue in the patient expresses PD-L1 in ≥50% of
tumor cells, administering one or more doses of a therapeutically effective amount of the
antibody or the
antigen-binding fragment thereof to the patient, thereby treating
lung cancer in the patient.SELECTED DRAWING: None