Hodgkin's lymphoma is a cancer of the lymph system. The lymph system is a series of tubes and nodes that run through the body. It contains a fluid that helps fight infections and move waste out of the body.

The cancer starts in a type of lymph cell called a lymphocyte. These cells spread throughout the lymph system. Eventually, the cells will make it harder for your body to fight infections. It is considered a very treatable form of cancer.

The Lymphatic System
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The exact cause is not known. A combination of genetic and environmental factors may play a role.