Müller-Weiss disease (MWD) is a dysplasia of the tarsal navicular. The shifting of the talar head laterally over the calcaneus drives the subtalar joint into varus. Failure to identify patients with paradoxic flatfoot varus may lead to the incorrect diagnosis and management. Conservative treatment with the use of rigid insoles with medial arch support and a lateral heel wedge is effective in most patients. Dwyer calcaneal osteotomy combined with lateral displacement seems to be a satisfactory treatment for patients who had failed to respond to conservative measures and a good alternative to the different types of perinavicular fusions.
Keywords: Avascular necrosis; Calcaneal osteotomy; Müller-Weiss disease; Paradoxic planovarus; Tarsal navicular; Varus hindfoot.
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