type A1/B postaxial polydactyly

Genetics

• autosomal dominant
• associated with defects in GLI3

Clinical manifestations

• extra digit in the ulnar &/or fibular side of the upper &/or lower extremities
• the extra digit is well formed & articulates with the fifth, or extra, metacarpal/metatarsal, & thus it is usually functional

More general terms

• postaxial polydactyly

Database

• OMIM: https://mirror.omim.org/entry/603596