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Table 2 Vilkki HWO severity grading for radial dysplasia

From: Hand function in children with radial longitudinal deficiency

   Severity points HWO (−1 to 16p) Severity points mH (−1 to 9p)
H HAND (0-8p)   
  MCP II-V flexion <45° 1/ digit 1/digit
  PIP II-V extension deficit >20° 1/digit 1/digit
W WRIST Radial deviation (0-4p)   
  Mild 10-30° 1  
  Moderate 30-60° 2  
  Severe 60-90° 3  
  Extreme >90° 4  
O OTHER (0-3p)   
  Elbow TAM <60° or weak flexion 1  
  Elbow Extension deficit >20° 1  
  Shoulder Abduction or Flexion <120° 1  
  Pinching pattern dig IV-V 1 1
  Functional or reconstructable thumb −1 −1
  Sum Maximum 16 9