Hypocalciuric Hypercalcemia, Familial, Type I, also known as familial hypocalciuric hypercalcemia 1, is related to hypocalciuric hypercalcemia, familial, type iii and familial hypocalciuric hypercalcemia. An important gene associated with Hypocalciuric Hypercalcemia, Familial, Type I is CASR (Calcium Sensing Receptor), and among its related pathways/superpathways are Signal Transduction and Signaling by WNT. Affiliated tissues include bone and kidney, and related phenotypes are hypercalciuria and hypercalcemia