What are characteristic findings in the hands? 
One of the skeletal abnormalities of AHO—“knuckle, knuckle, dimple, dimple” appearance of the hand resulting from premature closure of the epiphyses—is known as knuckle-dimple sign or Archibald’s sign
It is a feature of Albright's Hereditary Osteodystrophy (AHO) phenotype known to be associated with both pseudohypoparathyroidism (PHP) as well as pseudopseudohypoparathyroidism (PPHP).
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