preaxial polydactyly II

info · Genetic

A polydactyly characterized by the presence of 3 phalanges within the thumb that has_material_basis_in heterozygous mutation in the ZRS, a regulatory element of SHH, on chromosome 7q36.

Signs and symptoms

Preaxial hand polydactyly
Duplication of thumb phalanx
Opposable triphalangeal thumb
Postaxial hand polydactyly
Duplication of phalanx of hallux
Preaxial foot polydactyly
Postaxial foot polydactyly
Syndactyly
Complete duplication of distal phalanx of the thumb

Also known as: polydactyly of a triphalangeal thumb