Nivolumab Plus Cisplatin/Pemetrexed or Cisplatin/Gemcitabine as Induction in Resectable Non-Small Cell Lung Cancer

PRIMARY OBJECTIVES: I. To estimate major pathologic response (mpCR) in patients with newly diagnosed and untreated non-small cell lung cancer (NSCLC) stage I-IIIA treated with three courses of induction nivolumab added to either cisplatin/pemetrexed or cisplatin/gemcitabine prior to surgery. SECONDARY OBJECTIVES: I. Safety. II. Complete pathologic response at all sites of disease. III. Major pathologic response rate at primary site. IV. Clinical complete response rate. V. 1 year progression free survival (PFS). VI. Overall survival. TERTIARY OBJECTIVES: I. To explore whether PDL1 expression is associated with treatment response. II. To explore whether there is a net change in the Th1/Th2 ratio (IFN-gamma, IL-4, IL10, etc.) or cell subset frequencies (M2 monocytes, myeloid-derived suppressor cells, etc.) within a patient's peripheral blood either at baseline or in response to treatment is associated with treatment response. III. To explore whether exosomes or other immune related serum biomarkers change after combination therapy. IV. To explore the predictive value of serial cell free deoxyribonucleic acid (DNA) levels and response. V. PD-L1 assessment in tumor.