Skip to main content

Table 1 Modified Bayne classification of RLD

From: Hand function in children with radial longitudinal deficiency

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