Table 1

Modified Bayne classification of RLD
Type Thumb Carpus Distal radius Proximal radius
N Hypoplastic or absent Normal Normal radius Normal
0 Hypoplastic or absent Absence, hypolasia or coalition Normal radius Normal, radio-ulnar synostosis or congenital dislocation of radial head
I Hypoplastic or absent Absence, hypolasia or coalition Radius > 2 mm shorter than ulna Normal, radio-ulnar synostosis or congenital dislocation of radial head
II Hypoplastic or absent Absence, hypolasia or coalition Hypoplasia Hypoplasia
III Hypoplastic or absent Absence, hypolasia or coalition Partial absence of the radius Variable hypoplasia
IV Hypoplastic or absent Absence, hypolasia or coalition Absent Absent

Ekblom et al.

Ekblom et al. BMC Musculoskeletal Disorders 2013 14:116   doi:10.1186/1471-2474-14-116

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