What are the main causes of non-Hodgkin lymphoma?
• Various infections increase the risk of non-Hodgkin lymphoma, with the highest risks linked to infection with HIV. • Drugs given to suppress the immune system, for example following organ transplant, also increase the risk of non-Hodgkin lymphoma. • A family history of non-Hodgkin lymphoma almost doubles risk. • Occupational exposure to pesticides and benzene are linked to an increased risk of non-Hodgkin lymphoma.