An Open-label, Randomized, Parallel, Non Comparative, Phase II Trial of Nivolumab Plus Ipilimumab Versus Platinum-based Chemotherapy Plus Nivolumab in Chemonaive Metastatic or Recurrent Squamous-Cell Lung Cancer (SqLC)

Non-small-cell Lung Cancer (NSCLC) remains the leading cause of cancer death in Western Countries. Approximately 85% of lung cancers are of the non-small-cell type (NSCLC), with 25-30% of NSCLC being squamous histology type. Unlike nonsquamous NSCLC, squamous NSCLC rarely harbors epidermal growth factor receptor (EGFR) and anaplastic lymphoma kinase (ALK) mutations for which there are directed therapies, and until the recent approval of immunotherapies for pretreated squamous NSCLC, a limited number of traditional cytotoxic chemotherapy drugs have been FDA-approved for use in the treatment of advanced and metastatic squamous NSCLC. A platinum-based combination chemotherapy regimen has been the standard first-line treatment for all NSCLC. Carboplatin is frequently substituted for cisplatin for patients who have poor renal function or who experience toxicities from cisplatin (most notably, nausea and vomiting). Taxanes, especially paclitaxel, or vinorelbine or gemcitabine, commonly complete the standard two-drug backbone of platinum-based chemotherapy for the first-line treatment of NSCLC, with platin-gemcitabine as the most commonly used regimen in Europe in patients with squamous-histology. A recent press release announced that pembrolizumab plus chemotherapy produced higher response rate when compared to chemotherapy alone in patients with squamous-cell lung cancer. Nevertheless, no data on Progression-Free Survival (PFS) and Overall Survival (OS) are available. Therefore, considering the lack of data in patients with squamous histology and the lack of information about efficacy of combinations of immune-checkpoints inhibitors versus immune-checkpoint inhibitor plus chemotherapy, there is a strong rationale for conducting a study assessing efficacy of such strategies in patients with advanced, metastatic squamous-cell lung cancer.