Blood workup showed hypophosphatemia (2.4 mg/dL), elevated alkaline phosphatase (495U/L), normal calcemia, mildly elevated PTH (97.2 pg/mL; RR <68.3), and normallevels of 25-(OH)-vitamin D and 1.25-(OH)-vitamin D. The radiological evaluationshowed bone deformities of the radius and femur. This evidence concerns the gene PTH and hypophosphatemia.