Nephrolithiasis/osteoporosis, hypophosphatemic (NPHLOP) is a genetically heterologous group of disorders characterized by the formation of renal calcium stones or bone demineralization due to impaired renal phosphate reabsorption. It is caused by either mutations in SLC34A1, a sodium-phosphate cotransporter expressed in kidney and polarized osteoclasts, or in sodium-hydrogen exchanger regulatory factor (NHERF)1, that controls renal phosphate transport by trafficking SLC34A1.