Peripheral blood is the flowing, circulating blood of the body. It is composed of erythrocytes, leukocytes and thrombocytes. These blood cells are suspended in blood plasma, through which the blood cells are circulated through the body. Peripheral blood is different from the blood whose circulation is enclosed within the liver, spleen, bone marrow and the lymphatic system. These areas contain their own specialized blood.
Read more: What is Peripheral Blood? | eHow.com http://www.ehow.com/about_4672930_what-peripheral-blood.html#ixzz16sx3Wl5v
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http://en.wikipedia.org/wiki/Lymph_node
Lymph nodes also have clinical significance. They become inflamed or enlarged in various conditions, which may range from trivial, such as a throat infection, to life-threatening such as cancers. In the latter, the condition of lymph nodes is so significant that it is used for cancer staging, which decides the treatment to be employed, and for determining the prognosis.
Lymphoma is a cancer in the lymphatic of the immune system and presents as a solid tumor of lymphoid cells. It is treatable with chemotherapy, and in some cases radiotherapy and/or bone marrow transplantation, and can be curable depending on the histology, type, and stage of the disease.[1]
Thomas Hodgkin published the first description of lymphoma in 1832, specifically of the form named after him, Hodgkin's lymphoma.[2]
http://en.wikipedia.org/wiki/Lymphoma
Non-hodgkin Lymphoma (Follicular lymphoma)
http://lymphoma.about.com/od/nonhodgkinlymphoma/p/follicularnhl.htm
Slow-growing cancer
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