Lymphoma is a cancer of the lymphatic system, which is part of the body's germ-fighting network.
The lymphatic system includes the lymph nodes (lymph glands), spleen, thymus gland and bone marrow. Lymphoma can affect all those areas as well as other organs throughout the body.
While there are many types of lymphoma, the main subtypes are:
Hodgkin lymphoma (formerly called Hodgkin's disease)
Non-Hodgkin lymphoma
Symptoms
Signs and symptoms of lymphoma may include:
Painless swelling of lymph nodes in your neck, armpits or groin