LYMPHOMA - Symptoms and Treatments Lymphoma is a type of cancer that begins in immune system cells called lymphocytes. Like other cancers, lymphoma occurs when lymphocytes are in a state of uncontrolled cell growth and multiplication. Lymphocytes are white blood cells that move throughout the body in a fluid called lymph. They are transported by a network of vessels that make up the lymphatic system, part of the immune system. The lymphatic system - whose job it is to fight … [Read more...]