ENPP1 and Hypercalciuria: Also, autosomal recessive hypophosphatemic rickets type IA (mutation in the DMP1 gene), autosomal recessive hypophosphatemic rickets type IB (mutation in the ENPP1 gene), autosomal recessive hypophosphatemic rickets type IC (mutation in the FAM20 gene), and hereditary hypophosphatemic rickets with hypercalciuria (HHRH; mutation in the SLC34A1 and SLC34A3 genes) may be contributory [11, 30, 31].