Lymphomas refer to cancers of the lymph system. The lymph system is made up of thin tubes that branch, like blood vessels, into all parts of the body. They carry lymph, a colorless, watery fluid that contains white blood cells called lymphocytes. Along the network of vessels are groups of small bean-shaped organs called lymph nodes. Clusters of lymph nodes are found in the underarm, pelvis, neck and abdomen.
Lymph nodes make and store infection-fighting cells.
The spleen, thymus and tonsils are also part of the lymph system. Non-Hodgkin's disease can also occur in children and is treated differently. See your doctor if you have any of these symptoms for longer than two weeks. See your doctor if you have any of these symptoms for longer than two weeks. For non-Hodgkin's adult disease , your doctor will examine you carefully and check for swelling in your neck, underarms and groin.