Pseudohypoparathyroidism, Type Ic, also known as pseudohypoparathyroidism type 1c, is related to pseudohypoparathyroidism and pseudohypoparathyroidism, type ia, and has symptoms including seizures An important gene associated with Pseudohypoparathyroidism, Type Ic is GNAS (GNAS Complex Locus). Affiliated tissues include bone and skin, and related phenotypes are pseudohypoparathyroidism and hypocalcemia