Bilateral intra-articular loose bodies of the elbow in an adolescent BMX rider.

The case of an adolescent BMX rider suffering from bilateral intraarticular loose bodies of the elbow is reported. He underwent surgery to remove these. He is now asymptomatic and has resumed BMX riding. This is the first overuse injury to be ascribed to this sport. It is probably due to repetitive valgus compression stresses at the radiocapitellar joint during the acrobatic manoeuvres of a typical BMX riding session.