Late extensor pollicis longus rupture following displaced distal radius and ulna fractures in a child.

A 12-year-old boy experienced rupture of the extensor pollicis longus 1 month after closed reduction and percutaneous pinning of a markedly volarly displaced fracture of the distal radius and ulna. Late extensor pollicis longus rupture is a rare complication in children, especially following a markedly displaced fracture.