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Eosinophilia is a condition in which the eosinophil count in the peripheral blood exceeds 5 × 10 8 /L (500/μL). [1] Hypereosinophilia is an elevation in an individual's circulating blood eosinophil count above 1.5 × 10 9 /L (i.e. 1,500/μL).
Because high-dose prednisone rapidly lowers eosinophil levels, it is usually started at a dose of 1 mg/kg/day. [6] Upon achieving appropriate control over eosinophilia, the medication can be gradually reduced. [25] Steroid-refractory HES has been managed with a variety of cytotoxic treatments. [24]
Familial eosinophilia is a rare congenital disorder characterized by the presence of sustained elevations in blood eosinophil levels that reach ranges diagnostic of eosinophilia (i.e. 500–1500/microliter) or, far more commonly, hypereosinophilia (i.e. >1,500/microliter).
Lymphocyte-variant hypereosinophilia is a rare disorder in which eosinophilia or hypereosinophilia (i.e. a large or extremely large increase in the number of eosinophils in the blood circulation) is caused by an aberrant population of lymphocytes.
Eosinophils can also cause tissue damage in the lungs of asthmatic patients. [7] High concentrations of eosinophil major basic protein and eosinophil-derived neurotoxin that approach cytotoxic levels are observed at degranulation sites in the lungs as well as in the asthmatic sputum. [7]
The specific treatment (i.e. treatment other than measures to support the cardiovascular system) of eosinophilic myocarditis differs from the specific treatment of other forms of myocarditis in that it is focused on relieving the underlying reason for the excessively high numbers and hyperactivity of eosinophils as well as on inhibiting the ...
Clonal hypereosinophilia, also termed primary hypereosinophilia or clonal eosinophilia, is a grouping of hematological disorders all of which are characterized by the development and growth of a pre-malignant or malignant population of eosinophils, a type of white blood cell that occupies the bone marrow, blood, and other tissues.
The symptoms of DRESS syndrome usually begin 2 to 6 weeks but uncommonly up to 8–16 weeks after exposure to an offending drug. Symptoms generally include fever, an often itchy rash which may be morbilliform or consist mainly of macules or plaques, facial edema (i.e. swelling, which is a hallmark of the disease), enlarged and sometimes painful lymph nodes, and other symptoms due to ...