ESPE Yearbook of Paediatric Endocrinology

In Brief: Autosomal recessive hypophosphatemic rickets type 1 (ARHR1) is caused by inactivating pathogenic variants in the DMP1 gene. Fibroblast growth factor 23 (FGF23) concentration is elevated, which causes hypophosphatemic rickets. This study showed benefits of burosumab (Crysvita), a humanized monoclonal antibody to FGF23, on biochemical and clinical outcomes in two patients with ARHR1.Commentary: ARHRs are rare, heritable renal phosphate-w...