Talonavicular coalition is a rare autosomal recessive congenital anomaly that is usually asymptomatic and detected incidentally on radiographs. It is associated with symphalangism, clinodactyly, a great toe that is shorter than the second toe, clubfoot, calcaneonavicular coalition, talocalcaneal coalition and a ball-and-socket ankle joint. The authors present a review of the literature and case report of a patient with complete osseous talonavicular coalition, talocalcaneal coalition and lateral ankle instability which was successfully treated with subtalar fusion and lateral ligament reconstruction.
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