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lymphoma, non-Hodgkin's

non-Hodgkin's lymphoma, any cancer of the lymphoid tissue (see lymphatic system) in which the Reed-Sternberg cells characteristic of Hodgkin's disease (the other category of lymphoma) are not present. There are about 10 different types of non-Hodgkin's lymphomas, some slower- or faster-growing than others. Non-Hodgkin's lymphoma can affect children as well as adults. In most cases the cause is unknown, but an increased incidence has been observed in people who have been exposed to Agent Orange, and some forms of the disease are frequently seen in people with AIDS, many of these in association with latent Epstein-Barr virus infection.

Symptoms

The first symptom of non-Hodgkin's lymphoma is often a painless swelling of a lymph node in the neck, the groin, or under the arm. Other symptoms include fever, night sweats, itching, and unexplained weight loss. Diagnosis is made by laboratory study of tissue obtained by taking a biopsy of the suspicious lymph node or nodes.

Treatment

Treatment depends on how far the disease has progressed. It may include external-beam radiation therapy, chemotherapy, or biological therapy (boosting the body's immune response to the disease). Rituxan, a genetically engineered drug involving monoclonal antibodies, has been approved for use against some low-grade (slow-growing) non-Hodgkin's lymphoma.

Bone marrow transplantation is also sometimes used. In this technique, bone marrow (blood cell–producing tissue inside bone) is taken from the patient and treated to kill any cancer cells. The patient is then given very high dose chemotherapy designed to destroy the cancer; it also destroys the remaining bone marrow. After chemotherapy, the stored marrow is reinserted into the patient. In children, chemotherapy is the most common treatment.

Bibliography

See publications of the National Cancer Institute and the American Cancer Society.

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Non-Hodgkin's Lymphoma

Non-Hodgkin's lymphoma

Definition

One of two general types of lymphomas (cancers that begin in lymphatic tissues and can invade other organs) differing from Hodgkin's disease (HD) by a lack of Hodgkin's-specific Reed-Sternberg cells.

Description

Non-Hodgkin's lymphoma (NHL) is a cancer of lymphocytes, a type of white blood cell that moves around the body as part of its role in the immune system. NHL is much less predictable than HD and is more likely to spread to areas beyond the lymph nodes.

NHL is comprised of approximately 10 subtypes and 20 different disease entities. Division is based on whether the lymphoma is low grade (progressing slowly) or high grade (progressing rapidly). NHL is also grouped according to cell typeB cells or T cells. Physicians can diagnose the type of lymphoma by performing a biopsy , in which a lymph node is removed and examined in the laboratory. Some of the Non-Hodgkin's lymphoma types include: Burkitt's lymphoma , diffuse large B-cell lymphoma, follicular center lymphoma, and mantle cell lymphoma .

Kate Kretschmann

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