[Intra-articular osteoid osteoma in the left elbow].

Intra-articular osteoid osteoma (OO) is a rare and difficult diagnosis. We report the case of an 11-year-old boy who presented with inflammatory monoarticular arthritis in the left elbow. This monoarthritis was resistant to all types of treatment. He had an OO, diagnosed late because the first symptoms developed subsequent to the ablation of a wart in the same elbow and were suggestive of arthritis.