After 3 months of therapy, the FIP1L1-PDGFRA fusion transcript was no longer detectable in peripheral blood.     ///    [A man with FIP1L1/PDGFRA-positive chronic eosinophilic leukemia]..     ///    He appeared to have chronic eosinophilic leukaemia that was positive for the 'FIP1-like-1-platelet-derived growth factor receptor alpha' (FIP1L1-PDGFRA) gene. 