Researchers have found that non–Hodgkin lymphoma (NHL) is linked with a number of risk factors, but the cause of most lymphomas is not known. This is .
Causes, Risk Factors, and Prevention. Learn about the risk factors for non–
Non–Hodgkin lymphoma is caused by a change (mutation) in the DNA of a type of white blood cell called lymphocytes, although the exact reason why this .
The Facts. Non–Hodgkin's lymphoma is a cancer of the lymphatic system and usually starts in lymphocytes (white blood cells) found in one or more lymph nodes.