Polydactyly
Classification
Pre-axial / great toe / 15%
Central / 2-4 MT / 5%
Post-axial / 5th MT / 80%
Type A - articulated
Type B - rudimentary
Epidemiology
2 in 1000 births
- 30% positive FHx
- autosomal dominant
Associated MT anomalies common
- block MT / Y-shaped / T-shaped /wide head
Treatment