Alternative definition : NICHD: A form of metaphyseal chondrodysplasia caused by mutation(s) in the PTH1R gene,
encoding parathyroid hormone/parathyroid hormone-related peptide receptor. This condition
is characterized by severe short stature, short bowed limbs, clinodactyly, prominent
upper face, and a small mandible. Hypercalcemia and hypophosphatemia due to PTH resistance
can appear later in childhood.;