The causes of<unk>  are not known; however, it has been discovered that it occurs more often in populations with certain disorders.<unk>  appears to be more common in individuals who have Turners syndrome. It also seems to be more commonly found in pseudohypoparathyroidism of Albright's hereditary osteodystrophy, brachydactyly, acrodysostosis, and occasionally with homocystinuria.
Archibald's sign
Fothergill's sign
Peabody's sign
Bancroft's sign
Lockwood's sign
Adson's sign
Piskacek's sign
Litten's sign 