Table 2.

Foucher’s Classification.

Type	Features	Thumb	Ulnar digit	Interventions
I	All bones and digits present, brachydactyly and syndactyly	Normal	Bones present, brachydactyly or syndactyly	Syndactyly release
IIA	≥2 fingers. Normal thumb, hypoplastic fingers	Normal	Hypoplastic, syndactyly	Nonvascularized toe phalanx transfers, ablation, or stabilization
IIB	Functional border digits, variable central nubbins	Normal	Present, variable hypoplasia and stability	Surgery rarely indicated
IIC	“Spoon hand,” thumb conjoined with hypoplastic ulnar digits	Present (± stability)	Hypoplastic, clinodactyly	Variable
IIIA	Monodactyly	Normal	Absent	Vascularized toe-to-hand transfer
IIIB	Monodactyly	Hypoplastic and/or unstable	Absent	Variable, vascularized toe-to-hand transfer, thumb stabilization, thumb lengthening
IVA	Peromelic, wrist mobility	Absent	Absent
IVB	Peromelic, no wrist mobility	Absent	Absent	Surgery not indicated