Hypereosinophilic syndrome

Hypereosinophilic syndrome is a disease defined by a persistently elevated eosinophil count in the blood, lasting at least six months and having no recognizable cause. Eosinophils are a type of white blood cell. According to the source lead, the disorder involves the heart, the nervous system or the bone marrow, so its effects are not confined to the blood itself. The lead gives this definition and the organs involved but does not describe causes, subtypes or treatment, and this entry does not go beyond it. The persistence of the raised count and the absence of an identifiable cause are the features that set the syndrome apart. This entry is a record of the condition, not medical advice.