Lymphoma begins when white blood cells called lymphocytes grow uncontrolled. These cells play a key role in the immune system to help fight infections and get rid of waste. When there are too many, they build up in areas of the body including the lymph nodes, spleen, or bone marrow. Symptoms include fatigue, weight loss, or fevers.
Lymph Nodes
Uncontrolled lymphocytes can build up in areas such as the lymph nodes

Spleen
Uncontrolled lymphocytes can build up in areas such as the spleen

Bone Marrow
Uncontrolled lymphocytes can build up in areas such as the bone marrow
