RT-PCR of the aspirate revealed the presence of transcripts of ETV6/PDGFR-beta t(5;12) gene fusion.     ///    This patient was diagnosed with a rare myeloproliferative variant of hypereosinophilic syndrome due to a t(5;12) ETV6/PDGFR-beta translocation.     ///    Hypereosinophilic syndrome due to ETV6/PDGFR-beta gene translocation - a diagnostic and therapeutic challenge.. 