Use of botulinum toxin as a non-surgical treatment option for idiopathic hallux varus: a case report.

Hallux varus presents with midline deviation of the hallux at the first metatarsophalangeal joint. If left untreated, it may lead to pain and difficulty with normal daily activities. Here, we present a case of spontaneous hallux varus in an 84-year-old female treated non-operatively with injection of botulinum toxin in the Abductor Hallucis Brevis. Ultrasound guidance with electromyography was used to assist in all injections. Near total symptomatic relief and resumption of daily activities was obtained for up to 12 weeks at a time. Radiographic correction seen was improvement from 14° to 7° on weight bearing radiographs. After five rounds of treatment, no adverse reactions had been observed.