The molecular anatomy of the FIP1L1-PDGFRA fusion gene..     ///     The FIP1L1-PDGFRA fusion gene is a recurrent molecular abnormality in patients with eosinophilia-associated myeloproliferative neoplasms.     ///    We characterized FIP1L1-PDGFRA junction sequences from 113 patients at the mRNA (n=113) and genomic DNA (n=85) levels.     ///    "Stretches of overlapping sequences were identified at the genomic junction site, suggesting that the FIP1L1-PDGFRA fusion is created by illegitimate non-homologous end-joining. "    ///    The variability in the anatomy of the FIP1L1-PDGFRA fusion has important implications for strategies to detect the fusion at diagnosis or for monitoring response to treatment.. 