14. Congenital Hand Disorders
14. Congenital Hand Disorders
hand development ในช่วง 4th- 8th gestational
– 3-4 wk – upper limb bud formation
4-5 wk – prox to distal upper limb development
ไม่เกิน 5wk – upper libm form , แต่ยังไม่ digital separation
ไม่เกิน 8 wk – complete development of upper limb and hand
signaling pathway ของ upper limb development
Classification of Congential hand disorders
Type I – failure of formation of parts
includes – case of longitudinal or transverse arrest
Type II – failure to differentiation or separation of parts
– includes – all cases of inadequate separation of parts
– Syndactyly
– Camtodactyly
– Clinodactyly
– Symbrachydactyly