Lymphoma is the most common form of cancer of the blood. Lymphoma can start in the lymph nodes, spleen, bone marrow, in the blood or various organs.
When the white blood cells of the body start to multiply too fast or don't die off as fast as they normally do, they can form a tumor.
Treatment can involve a bone marrow transplant or different types of chemotherapy/radiotherapy.
The prognosis of lymphoma depends on many different variables.