Displaced dorsal metaphyseal cortex associated with delayed extensor pollicis longus tendon entrapment in a pediatric Smith's fracture.

Extensor pollicis longus (EPL) tendon entrapment has been rarely reported as a complication of closed treatment of a pediatric Smith's type distal radius fractures. This article presents the unique case of an initially functional EPL tendon that became entrapped in fracture callus in a 9-year-old boy, the youngest reported in the literature.