A hereditary syndrome clinically similar to HYPOPARATHYROIDISM. It is characterized by HYPOCALCEMIA; HYPERPHOSPHATEMIA; and associated skeletal development impairment and caused by failure of response to PARATHYROID HORMONE rather than deficiencies. A severe form with resistance to multiple hormones is referred to as Type 1a and is associated with maternal mutant allele of the ALPHA CHAIN OF STIMULATORY G PROTEIN.

A syndrome characterized by variable features such as short stature, obesity, round face, subcutaneous ossifications, and BRACHYDACTYLY. It is associated with resistance to PARATHYROID HORMONE and THYROTROPIN. The autosomal dominant inherited form (PSEUDOHYPOPARATHYROIDISM, TYPE IA) is caused by mutations in the GNAS gene. OMIM: 103580.