Immunotherapy is becoming another possible alternative in the treatment of lung cancer. It is a completely different method of treating cancer which is not directed to the tumor itself, but to the immune system. Surface antigens present on tumor cells may be an effective and specific therapeutic targets and strategies based on antibodies inhibiting immune check-points significantly improves the antitumor immune response. Monoclonal antibody blocking CTLA 4 (cytotoxic T-lymphocyte antigen) and PD 1 receptor (protein programmed cell death) and its ligand PD L1 showed clinical efficacy and nivolumab (antiPD 1) was approved in 2nd line treatment squamous nonsmall cell lung cancer.

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