Trigger Hallux / Claw hallux

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Trigger Hallux/Claw hallux

A deformity of the hallux where the IPJ is in a flexed position and the MTPJ is hyperextended.

Aetiology
Often secondary to a forefoot varus, dorsiflexed or short first ray
May be secondary to a neurological disorder (eg Charcot-Marie-Tooth disease, cerebral palsy). Maybe more common in ballet dancers.

Clinical Features:
May be associated with neuromuscular or rigid foot types.
Plantar hyperkeratosis – also dorsal IPJ
EHL tendon is prominent and show signs of pressure (bursal formation and hyperkeratosis)

Treatment:
Management of lesions
Surgical

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