[Oncogenic osteomalacia: the role of the phosphatonins. Diagnostic usefulness of the Fibroblast Growth Factor 23 measurement in one patient].

Introduction: Oncogenic osteomalacia (OO) is a rare paraneoplastic syndrome characterized by severe hypophosphatemia induced by phosphaturic factors which are secreted by some tumors of mesenchymal origin. Fibroblast Growth Factor 23 (FGF-23) belongs to this family. Measurement of FGF-23 might improve the diagnosis of OO.