PTH and pseudohypoparathyroidism type 1A: Adegbite et al8 reviewed the charts of 111 individuals who had cutaneous and subcutaneous ossification for 8 characteristics: age of onset of HO, presence and location of HO, depth of HO, type of HO, progression of HO, features of AHO, parathyroid hormone resistance, and GNAS mutation analysis.