<qa>  What is the name of the drug used to boost the immune systems ability to fight cancerThe purpose of this Pilot Study is to investigate the safety, side effects, and benefits of tumor- infiltrating lymphocytes TILs when they are given with the drug nivolumab. Nivolumab is a type of immunotherapy - a drug that is used to boost the ability of the immune system to fight cancer, infection, and other diseases. 