Carpal Angle

= angle of 130° formed by tangents to proximal row of carpal bones

1. DECREASED CARPAL ANGLE (<124°)
   1. Turner syndrome
   2. Hurler syndrome
   3. Morquio syndrome
   4. Madelung deformity
2. INCREASED CARPAL ANGLE (>139°)
   1. Down syndrome
   2. Arthrogryposis
   3. Bone dysplasia with epiphyseal involvement