The pathogenesis of hallux valgus deformity is multifactorial. Conservative treatment can alleviate pain but is unable to correct the deformity. Surgical treatment must be adapted to the type and severity of the deformity. Success of surgical treatment ranges from 80% to 95%, and complication rates range from 10% to 30%. Ankle osteoarthrosis most commonly occurs as a consequence of trauma. Ankle arthrodesis and total ankle replacement are the most common surgical treatments of end stage ankle osteoarthrosis. Both types of surgery result in similar clinical improvement at midterm; however, gait analysis has demonstrated the superiority of total ankle replacement over arthrodesis. More recently, conservative surgery (extraarticular alignment osteotomies) around the ankle has gained popularity in treating early- to mid-stage ankle osteoarthrosis. Adult acquired flatfoot deformity is a consequence of posterior tibial tendon dysfunction in 80% of cases. Classification is based upon the function of the tibialis posterior tendon, the reducibility of the deformity, and the condition of the ankle joint. Conservative treatment includes orthotics and eccentric muscle training. Functional surgery is indicated for treatment in the early stages. In case of fixed deformity, corrective and stabilising surgery is performed. Cite this article: Crevoisier X, Assal M, Stanekova K. Hallux valgus, ankle osteoarthrosis and adult acquired flatfoot deformity: a review of three common foot and ankle pathologies and their treatments. EFORT Open Rev 2016;1:58–64. DOI: 10.1302/2058-5241.1.000015.

Les entorses de cheville sont un motif de consultation très fréquent. Dans la plupart des cas, elles se limitent à des lésions de l'appareil ligamentaire externe. Toutefois, elles peuvent masquer des lésions plus graves incluant les fractures du processus latéral du talus, de la base du 5 e métatarsien, les lésions ligamentaires internes, de la syndesmose, les entorses du Chopart et la luxation des tendons fibulaires. Il n'est pas toujours facile de poser le bon diagnostic en urgence et une prise en charge initiale insuffisante de ces lésions peut hypothéquer significativement le pronostic fonctionnel. Le but de cet article est de rendre le praticien de premier recours attentif à ces lésions potentielles et de l'aider à poser le bon diagnostic en vue d'un traitement initial adéquat. Six pitfalls around the ankle sprainsAnkle sprains are frequently encountered. They result most of the time in lesions of the lateral ligament complex. Nevertheless, in the context of an ankle sprains, more severe injuries including fracture of the lateral process of the talus, fracture of the base of the 5 th metatarsal, tear of the medial ligament complex, lesion of the syndesmosis, sprain of the Chopart joint, and peroneal tendons luxation are potentially overlooked and, if treated inadequately, may be associated with poor functional outcome. The goal of the present paper is to make the emergency practitioner aware of these potential lesions, and to help him making the correct diagnosis in order to initiate the adequate treatment.

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