Dysplasia epiphysealis hemimelica (Trevor disease) presenting as peroneal spastic flatfoot deformity: a case report.

Trevor disease (dysplasia epiphysealis hemimelica) involving the foot and ankle is not uncommon, but its presentation as a progressive spastic flatfoot deformity is unusual. The patient reported had an isolated lesion in the medial facet of the subtalar joint. In addition to the unusual presentation and location, the lesion recurred 1 year after surgical excision.