Study to Assess the Safety of Nivolumab in the Treatment of Metastatic Melanoma, Lung Cancer, Renal Cancer, Squamous Cell Carcinoma of the Head and Neck, and Chronic Hodgkin Lymphoma in Adults in Mexico

This is a post-marketing study of patients who started nivolumab as first- or second-line therapy for metastatic melanoma or as second-line therapy for metastatic squamous non-small cell lung cancer (SqNSCLC) , metastatic non-SqNSCLC, metastatic renal cell carcimona (RCC), or recurrent or metastatic squamous cell carcinoma of the head and neck cancer (SCCHN), or third-line therapy for classical Hodgkin lymphoma (cHL) in Mexico.