How Immunotherapy Treats Cancer Immunotherapy is a newer form of cancer treatment that uses the patient's immune system to fight cancer. This treatment uses materials created by the body or within a laboratory to help boost or restore the immune system's function so that it can better detect and fight the cancer. Currently there are various immunotherapy cancer drugs being studied to fight many different types of advanced and metastatic cancer, including lung cancer, melanoma, ovarian and battle the cancer. In this video, oncologist Stephen Lemon MD provides an overview on immunotherapy, including how this cancer treatment works and what types of side effects it may cause. Dr. Stephen Lemon is the President of Oncology Associates, P.C., which is based in Omaha, Nebraska and specializes in personalized cancer treatment, which includes genetic cancer risk evaluation, medical oncology, hematology, chemotherapy, targeted therapy and diagnostic services. Please visit to learn more about their approach to personalized cancer care.