Recently, a novel FN1-FGFR1 gene fusion has been described in a subset of PMTs.     ///    "Our findings indicate that up-regulation of FGFR1 in phosphaturic mesenchymal tumours can occur via mechanisms other than FN1-FGFR1 fusion, raising the possibility of FGFR1 overexpression being a potential common pathway with pathophysiological and therapeutic implications.. "