N. Horiguchi

Burosumab-responsive micro tumor-induced osteomalacia caused by a 6-mm phosphaturic mesenchymal tumor of the femoral head: a case report with review of literature on small (≤10 mm) FGF23-producing tumors.

A woman in her thirties presented with progressive bone pain, muscle weakness, recurrent stress fractures, and delayed fracture healing. Laboratory investigations demonstrated hypophosphatemia, renal phosphate wasting, elevated fibroblast growth factor 23 (FGF23), and inappropriately low 1,25-dihydroxyvitamin D, leadin...