We recently identified the FIP1L1-PDGFRA fusion gene in approx 50% of HES/CEL cases.     ///    Here we describe three different techniques to detect the presence of the FIP1L1-PDGFRA fusion gene in peripheral blood or bone marrow cells..     ///    Detection of the FIP1L1-PDGFRA fusion in idiopathic hypereosinophilic syndrome and chronic eosinophilic leukemia.. 