FGF23 and Fabry disease: SBS (p < 0.001), average FGF-23 (p = 0.002), a history of at least one fracture (p = 0.001) and of surgical interventions (p < 0.001) significantly differed between FD subtypes (monostotic/polyostotic/McCune–Albright syndrome) with increasingly higher SBS, FGF-23 levels and fracture and surgical intervention rates in the more severe subtypes.