Lymphoma cancer is often called the "Rosetta Stone" of cancer research because it has helped unlock the mysteries of several other types of cancer.  Lymphoma is a cancer of white blood cells called B-lymphocytes, or B-cells.  The average age of patients with this lymphoma is about 60.  Burkitt lymphoma consists of uniform, small, noncleaved cells, whereas Burkitt-like lymphoma is a highly disputed diagnosis among pathologists owing to features that are consistent with diffuse large B-cell lymphoma (DLBCL).  Non-Hodgkin lymphoma is one of the most rapidly increasing types of cancer diagnosed in the United States with new diagnoses having more than doubled since the 1970s.  Non Hodgkin's lymphoma is a term that encompasses a variety of cancers affecting the immune system.  General Information About Adult Non-Hodgkin Lymphoma Key Points for This Section Adult non-Hodgkin lymphoma is a disease in which malignant (cancer) cells form in the lymph system.  Hodgkin's lymphoma is a malignancy (cancer) of lymph tissue found in the lymph nodes, spleen, liver, and bone marrow.  Treatment of childhood lymphoma is largely determined by staging.  The fifth leading cause of cancer in the United States, lymphoma is made up of more than 40 rare and highly diverse diseases that target the body's lymphatic system. At http://www.symptomsoflymphoma.com/ more information about lymphoma can be researched.