McCune–Albright Syndrome (Polyostotic Fibrous Dysplasia)

  • Sporadic, GNAS 1 gene mutation, encodes α subunit of Gs adenylate cyclase
  • Large café-au-lait macules (geographic border), precocious puberty, pathological fractures, endocrine abnormalities (hyperparathyroidism, hyperthyroidism, acromegaly), sclerosis at base of skull
   
 
MCCune – Café au lait macules, preCocious puberty; do NOT confuse with Albright hereditary osteodystrophy (pseudohypoparathyroidism)