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    Understanding Non-Hodgkin Lymphoma -- the Basics

    What Is Non-Hodgkin Lymphoma?

    Lymphoma refers to a malignancy of the lymphatic system. The lymphatic system is a network of nodes (knots of tissue) connected by vessels. Together, the lymph nodes drain fluid and waste products from the body. The lymph nodes act as tiny filters, removing foreign organisms and cells.

    Lymphocytes, are a type of white blood cell that helps fight infections caused by bacteria, viruses, or fungi. The lymph node function is to prevent infections from entering the bloodstream. When the lymphatic system is fighting an active infection, you may notice that some of the lymph nodes in the area of the infection become swollen and tender. This is the body’s normal reaction to an infection.

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    Chronic Lymphocytic Leukemia

    Chronic lymphocytic leukemia (CLL) is a cancer that affects a type of white blood cell called a "lymphocyte." Lymphocytes help your body fight infection. They're made in the soft center of your bones, called the marrow. If you have CLL, your body makes an abnormally high number of lymphocytes that aren't working right. More adults get CLL than any other type of leukemia. It usually grows slowly, so you may not have symptoms for years. Some people never need treatment, but if you do, it can...

    Read the Chronic Lymphocytic Leukemia article > >

    Lymphoma occurs when the lymph-node cells or the lymphocytes begin to multiply uncontrollably, producing cancerous cells that have the abnormal capacity to invade other tissues throughout the body. The two main types of lymphoma are Hodgkin lymphoma and non-Hodgkin lymphoma. The differences in these two types of lymphoma are certain unique characteristics of the different lymphoma cells.

    Non-Hodgkin lymphoma is further classified into a variety of subtypes based on the cell of origin (B-cell or T-cell), and the cell characteristics. The subtype of Non-Hodgkin lymphoma predicts the necessity of early treatment, the response to treatment, the type of treatment required, and the prognosis.

    Non-Hodgkin lymphoma is much more common than Hodgkin lymphoma. Non-Hodgkin lymphoma is the seventh most common cause of cancer-related deaths in the United States. The risk of developing non-Hodgkin lymphoma increases with age and it is more common in males than in females and in Caucasians. North America has one of the highest incidence of non-Hodgkin lymphoma.

     

    What Causes Non-Hodgkin Lymphoma?

    The exact cause of non-Hodgkin lymphoma is unknown. However, there are multiple medical conditions that are associated with an increased risk of developing the disease:

     

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