ENPP1 and autosomal dominant hypophosphatemic rickets: Other less common forms of hereditary HR include autosomal dominant HR (ADHR), autosomal recessive HR 1 (ARHR1), autosomal recessive HR 2 (ARHR2), hereditary HR with hypercalciuria (HHRH), and X-linked recessive HR (XRHR) which are caused by gene mutations in fibroblast growth factor 23 (FGF23), dentin matrix acidic phosphoprotein 1 (DMP1), ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1), solute carrier family 34, member 3 (SLC34A3), and chloride channel 5 (CLCN5), respectively.