FGF23 and X-linked hypophosphatemia: Recent research has attributed a substantial role in LVH pathogenesis to FGF23: As early as 1997 Nehme et al. hinted at it by showing that children with X-linked hypophospataemic rickets (XLH), an X-linked dominant disease with FGF23 overexpression and consecutive hypophosphataemia, to have signs of LVH (54).