Lymphoma is a wide term for various forms of cancer in the lymphatic system. This type of cancer is due to mutated lymphocytes, which results in the swelling of lymph nodes. There are two types of lymphocytes; B cells and T cells. Though lymphocytes are the white blood cells responsible for causing Lymphoma, they are capable of curing Lymphoma too. The possibility of this is dependent on the type of lymphoma, the stage and the cells effected. In a healthy patient, B cells are responsible for producing antibodies, and remembers the enemy. Somehow, these cells become mutated, multiplying out of control, and living longer than their life expectancy. This causes a buildup of B cells, or a cancerous clog of the lymph nodes. These cancerous cells pass through the immune systems regular checkpoints done by T cells. Immunotherapy uses immune checkpoint inhibitors to block the cancerous cells from tricking the T cells. By stopping the cancerous B cells from linking with the T cell’s checkpoints, the T cell recognizes the cells are not friends, but enemies. The T cell then carries out its job of injecting infected cells with an enzyme that enforces programmed cell death.