PTH and pseudohypoparathyroidism type 1A: Recently, the European Consortium for the study of PHP (EuroPHP) network proposed the term “inactivating PTH/PTHrP signaling disorder (iPPSD)” as a new classification instead of pseudohypoparathyroidism, in which they classified disorders of impairment of the PTH/PTHrP signaling pathway based on the pathophysiology.