Hypocalciuric Hypercalcemia, Familial, Type Iii, also known as familial hypocalciuric hypercalcemia 3, is related to hyperparathyroidism and multiple endocrine neoplasia, and has symptoms including bone pain An important gene associated with Hypocalciuric Hypercalcemia, Familial, Type Iii is AP2S1 (Adaptor Related Protein Complex 2 Subunit Sigma 1), and among its related pathways/superpathways are Signal Transduction and Transport of inorganic cations/anions and amino acids/oligopeptides. Affiliated tissues include bone and kidney, and related phenotypes are depression and muscle weakness