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Non-Hodgkin Lymphoma and the Environment. Non-Hodgkin's lymphomas are a group of cancers that start in lymphoid tissue, also called lymph or lymphatic tissue. The causes of Non-Hodgkin lymphomas are mostly unknown. Specific viruses, immune deficiency, and specific autoimmune conditions have been implicated in increased risk. However, some environmental issues, including exposures to pesticides and solvents, are also being investigated.
Hodgkin lymphoma - Causes. Causes of Hodgkin lymphoma. Hodgkin lymphoma is caused by a change (mutation) in the DNA of a type of white blood cell called B lymphocytes, although the exact reason why this happens isn't known. The DNA gives the cells a basic set of instructions, such as when to grow and reproduce.