Hubby was dx a little over 5 years ago with buccal cancer, had surgery and max radiation. Within a month, more cancer and radical mouth/neck dissection. A few months later cancer back again so he did strong chemo every 3 weeks. He had remission for 2.5 years. Cancer back...docs talking about immunotherapy. Has anyone done this? how successful? many side effects? From what I've read..... this treatment is mostly associated with trials? Looking for more info so can ask doctors more informed questions. thanks