At that time biochemical evaluation revealed hypophosphatemia (2.4 mg/dl; 2.6-4.5), normocalcemia (9.6 mg/dl; 8.6-10.2), normal albumin (4.3 g/dl; 3.9-4.9) and total protein (7.4 g/dl; 6.4-8.3) levels, elevated alkaline phosphatase (301 U/l; 35-104) and PTH (149.8 pg/ml; 15-65) levels; serum 1,25 dihydroxyvitamin D concentrations rose to 16.8 ng/ml (20-80). Here, PTH is linked to hypophosphatemia.