Hypereosinophilic Syndrome, Idiopathic, also known as idiopathic hypereosinophilic syndrome, is related to loeffler endocarditis and primary hypereosinophilic syndrome, and has symptoms including pruritus and myalgia. An important gene associated with Hypereosinophilic Syndrome, Idiopathic is PDGFRA (Platelet Derived Growth Factor Receptor Alpha), and among its related pathways/superpathways are ERK Signaling and Signal Transduction. The drugs Lenograstim and Cytarabine have been mentioned in the context of this disorder. Affiliated tissues include bone marrow and heart, and related phenotypes are eosinophilia and fever