urinary system disorder idiopathic disease idiopathic hypercalciuria https://github.com/monarch-initiative/mondo/issues/7693 Orphanet:2197 A rare renal disease characterized by persistent excess urinary calcium excretion in the absence of an underlying systemic disease and hypercalcemia. The condition leads to an increased risk for the formation of kidney stones and nephrocalcinosis, as well as reduced bone mineral density with increased incidence of fractures in some patients. UMLS:C0543800 MEDGEN:1433919 GARD:0028042 MONDO:0700418