Loss of function genetic variants in both SLC34A1 and SLC34A3 have been reported in patients with idiopathic infantile hypercalcemia (IIH) [56,57] and Hereditary Hypophosphatemic Rickets with Hypercalcuria (HHRH) [58,59]. This evidence concerns the gene SLC34A1 and hereditary hypophosphatemic rickets with hypercalciuria.