 This leads to increases in blood eosinophil levels, typically eosinophilia and, less commonly, hypereosinophilia.Hypereosinophilia may occur in the setting of damage to a single specific organ due to a massive infiltration by eosinophils.This disorder is sub-classified based on the organ involved and is not considered to be a form of primary hypereosinophilia, secondary hypereosinophilia, or the idiopathic hypereosinophilic syndrome because