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Hypereosinophilic syndrome is a disease characterized by a persistently elevated eosinophil count (≥ 1500 eosinophils/mm³) in the blood for at least six months without any recognizable cause, with involvement of either the heart, nervous system, or bone marrow.
Progression at a moderate rate over many months to years is the most common prognosis. [1] [9] In addition to the speed of inflammation-based heart muscle injury, the prognosis of eosinophilic myocarditis may be dominated by that of its underlying cause. For example, an underlying malignant cause for eosinophilia may be survival-limiting. [6] [9]
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 hypereosinophilic syndrome is a sustained elevation in this count above 1.5 × 10 9 /L (i.e. 1,500/μL) that is also associated with evidence of eosinophil-based tissue injury. Eosinophils usually account for less than 7% of the circulating leukocytes. [1]
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Reslizumab, a newly developed antibody directed against interleukin 5 that has been successfully used to treat 4 patients with the hypereosinophilic syndrome, may also be of use for lymphocyte-variant eosinophilia. [4] [5] [10] [11] Patients suffering minimal or no disease complications have gone untreated. [4]
Nearly 2 in 3 Americans diagnosed with HIV have reached viral suppression, though the lowest rates are among women, those aged 25 to 34, Black people, and people who inject drugs, Fanfair said.
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 ...