A type of WHITE BLOOD CELL involved in inflammatory, allergic or anti-parasitic responses. Usually present in the circulation in very low numbers.
Increased numbers of eosinophils circulating in the blood. It occurs in some cases of Hodgkin's disease, in asthma, hay fever and parasitic infections, hypereosinophilic syndrome and eosinophil leukemia.
Some patients with high eosinophil counts and abnormal bone marrow are classed as having eosinophil leukemia. It may not always be obvious whether the diagnosis should be eosinophil leukemia or hypereosinophilic syndrome. Some doctors consider eosinophil leukemia to be a form of chronic myeloid leukemia (CML).
The science of studying the occurrence of disease in populations and relating this to genetic and/or environmental causes.
Epstein Barr Virus
A common virus, which causes glandular fever. Also associated with Burkitt's lymphoma. There is some evidence of a link between Epstein-Barr virus infection and Hodgkin's disease.
See red blood cells.
A rare cancer of the blood affecting immature red blood cells. This is a sub-type of acute myeloid leukemia.
A rare condition related to polycthaemia rubra vera characterized by the production of large numbers of abnormal platelets. Symptoms include hemorrhage, thrombosis and enlargement of the spleen. Treatment varies according to the severity of the disease.
The scientific study of the factors, which cause disease e.g. environmental factors such as infections and radiation.
Extra Nodal Lymphoma
Literally "outside the lymph nodes", but exhibiting the characteristics of lymph node cancer. A term used to describe the extent and site of disease.
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The information in this glossary is cited with permission from the Leukemia Research Foundation web site.