Macrodactyly of the foot associated with plexiform neurofibroma of the medial plantar nerve.

A case of macrodactyly of the foot associated with plexiform neurofibroma of the digital branches of the medial plantar nerve is reported. The purpose of this article is to investigate the nature of the association of the rare localization of macrodactyly with a pathognomonic feature of von Recklinghausen disease. The case was approached by semiconservative surgical treatment. Two-year follow-up has shown no relapse of the deformity. These facts suggest that this case of macrodactyly was sustained by an underlying disorder, namely, a "forme fruste" of neurofibromatosis, implying the existence of a still unknown pathogenetic mechanism.