The presence of the FIP1L1-PDGFRA fusion gene in myeloid cells was confirmed by fluorescence in situ hybridisation analysis using CHIC2 deletion as a surrogate marker.     ///    Cough and hypereosinophilia due to FIP1L1-PDGFRA fusion gene with tyrosine kinase activity..     ///    This is the first case of persistent cough caused by hypereosinophilic syndrome characterised by FIP1L1-PDGFRA fusion gene and aberrant tyrosine kinase activity.. 