A case of osteoid osteoma of the trapezoid bone: the efficiency of dynamic magnetic resonance imaging for the detection of osteoid osteoma localized at the atypical site.

The occurrence of osteoid osteoma of the carpus is rare, particularly of the trapezoid. We present a case of a ten-year-old girl with osteoid osteoma of the trapezoid in whom surgical excision of the lesion was successful. Useful information for the diagnosis of the lesion was mainly provided by dynamic magnetic resonance imaging.