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Regional migratory osteoporosis and tarsal tunnel syndrome.

To the best of our knowledge, the coexistence of regional migratory osteoporosis (RMO) and tarsal tunnel syndrome has never been reported. The following case presents clinical, laboratory, and pathologic evidence of this coexistence, and suggests that in some patients with RMO there may be a mechanical component involved in their pain. RMO is now recognized as a unique clinical entity. In the 61 cases reported in the English literature since 1967,3.'4 a distinct clinical identification has emerged, manifested by severe lower extremity periarticular pain, muscle atrophy and localized edema, with symptoms lasting as long as 12