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Cancer that starts in the body's germ-fighting system, called the lymphatic system.

Non-Hodgkin lymphoma is cancer that starts in the body's germ-fighting system, called the lymphatic system. It happens when white blood cells, called lymphocytes, grow and form tumors throughout the body.

Symptoms may include swollen lymph nodes, fever, belly or chest pain, and feeling very tired.

Treatments may include chemotherapy, radiation therapy and bone marrow transplant, also called stem cell transplant. Other treatments may include targeted medicines and immunotherapy.