Hodgkin lymphoma is caused when something goes wrong inside the lymphocytes, which are a type of white blood cell made in the bone marrow and found in the blood and lymph tissue.
Usually, healthy lymphocytes help our bodies fight infection. In lymphoma, the lymphocytes don’t mature and can’t do their normal immune functions to defend against infection. The lymphoma cells don’t die off like they should. Instead, they collect in the lymph nodes.
There are several kinds of lymphocytes that protect the body in many ways:
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B lymphocytes, or B cells, make antibodies. Antibodies attach to bacteria and to cells that are infected with a virus or bacteria, so that other immune cells recognize them and know to destroy them.
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T lymphocytes, or T cells, help destroy invaders or tumor cells and attract or stimulate other immune cells to kill invaders.
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Natural killer cells search for abnormal cells and destroy them.
Most often, Hodgkin lymphoma starts in the lymph nodes in the upper part of the body — in the neck or chest or under the arms. It can spread through the lymph system to nearby lymph nodes and outside the lymph nodes to the bone marrow, lungs or liver. The good news: Hodgkin lymphoma can be cured or controlled for many years in most people who have the disease.
The lymph system
To understand lymphoma, it helps to know the basics about your lymph system. The lymph system is a network of tubes (lymphatic vessels) that slowly carry fluid from your tissues into your bloodstream to be recycled. This fluid (lymph) contains waste products from body tissues as well as immune system cells.
An important part of your immune system, lymph nodes are small, bean-shaped organs linked by your lymphatic vessels. They store lymphocytes and act as filters to trap foreign particles.
Lymph nodes are located throughout your body in your neck, underarms, groin and behind your knees. They are also deeper inside your body in your chest, abdomen and pelvic area. Along with lymph nodes, you have other lymph tissue, including organs related to your immune and blood-forming systems, such as your spleen, thymus and bone marrow.
Antibody
A protein made by immune system cells and released into the blood. Antibodies defend the body against foreign substances, such as bacteria.
B cell
A type of white blood cell that makes antibodies. B cells are part of the immune system and develop from stem cells in the bone marrow.
B cell
A type of white blood cell that makes antibodies. B cells are part of the immune system and develop from stem cells in the bone marrow.
Bone marrow
The soft, spongy material in the center of your bones that produces all your blood cells, such as white blood cells, red blood cells and platelets.
Lymphocyte
A type of immune cell that is made in the bone marrow and is found in the blood and in lymph tissue. The two main types of lymphocytes are B lymphocytes and T lymphocytes.
A type of immune cell that is made in the bone marrow and is found in the blood and in lymph tissue. The two main types of lymphocytes (white blood cells) are B lymphocytes and T lymphocytes. B lymphocytes make antibodies, and T lymphocytes help kill tumor cells and help control immune responses.
Lymphoma
Cancer that begins in the cells of the immune system. There are two basic categories of lymphomas: Hodgkin lymphoma and non-Hodgkin lymphomas.
Cancer that begins in cells of the immune system. There are two basic categories of lymphomas. One is Hodgkin lymphoma, which is marked by the presence of a type of cell called the Reed-Sternberg cell. The other category is non-Hodgkin lymphomas, which includes a large, diverse group of cancers of immune system cells. Non-Hodgkin lymphomas can be further divided into cancers that have an indolent (slow-growing) course and those that have an aggressive (fast-growing) course. These subtypes behave and respond to treatment differently. Both Hodgkin and non-Hodgkin lymphomas can occur in children and adults, and prognosis and treatment depend on the stage and the type of cancer.
Lymph system
The tissues and organs that produce, store and carry white blood cells that fight infections and other diseases.
The tissues and organs that produce, store and carry white blood cells that fight infections and other diseases. This system includes the bone marrow, spleen, thymus, lymph nodes and lymphatic vessels (a network of thin tubes that carry lymph and white blood cells). Lymphatic vessels branch, like blood vessels, into all the tissues of the body.
Spleen
An organ that is part of the lymphatic system. The spleen makes lymphocytes, filters the blood, stores blood cells and destroys old blood cells. It is on the left side of the abdomen near the stomach.
T cell
A type of white blood cell. T cells are part of the immune system and develop from stem cells in the bone marrow. They help protect the body from infection and may help fight cancer.
A type of white blood cell. T cells are part of the immune system and develop from stem cells in the bone marrow. They help protect the body from infection and may help fight cancer. Also called T lymphocyte and thymocyte.
T lymphocyte
A type of white blood cell. T lymphocytes are part of the immune system and develop from stem cells in the bone marrow. They help protect the body from infection and may help fight cancer.
A type of white blood cell. T cells are part of the immune system and develop from stem cells in the bone marrow. They help protect the body from infection and may help fight cancer. Also called T cells and thymocyte.
Thymus
An organ that is part of the lymphatic system, in which T lymphocytes grow and multiply. The thymus is in the chest behind the breastbone.
White blood cell
A type of blood cell that is made in the bone marrow and found in the blood and lymph tissue. White blood cells are part of the body’s immune system and help the body fight infection and other diseases.
A type of blood cell that is made in the bone marrow and found in the blood and lymph tissue. White blood cells are part of the body’s immune system. They help the body fight infection and other diseases. Types of white blood cells include granulocytes (neutrophils, eosinophils and basophils), monocytes and lymphocytes (T cells and B cells). Checking the number of white blood cells in the blood is usually part of a complete blood cell (CBC) test. It may be used to look for conditions such as infection, inflammation, allergies and leukemia. Also called leukocyte and WBC.