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Guidelines for sites linking to mayoclinic.orgHypereosinophilic syndrome rarely occurs in children. It causes excessive numbers of eosinophils (a type of white blood cell) to accumulate in the blood. Elevated levels of eosinophils can damage organs throughout the body. The origin of the syndrome is unknown.
Treatment for hypereosinophilic syndrome involves steroids and other medications to stop the overproduction of eosinophils.
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