Non-Hodgkin lymphoma is a type of cancer that affects the lymphatic system, a network of vessels and glands found throughout your body.
The exact cause of non-Hodgkin lymphoma is unknown. It's more common in people who have a weakened immune system.
The main treatments for non-Hodgkin lymphoma are chemotherapy, radiotherapy and anti-cancer medicines called monoclonal antibodies.
The main symptom of non-Hodgkin lymphoma is swollen glands that do not go away.