Lymphoma is the most common type of blood cancer that affects that develops in the lymphatic system. Lymphoma are of two major types: Hodgkin lymphoma and non-Hodgkin lymphoma (NHL). Lymphoma is caused when lymphocytes, type of white blood cells of the immune system grow and multiply uncontrollably. Cancerous lymphocytes may travel to different parts of the body, including the spleen, blood, lymph nodes, bone marrow, and form a mass called a tumor. The two type ... Read more