Arthroscopic removal of an intraarticular osteoid osteoma of the distal tibia.

Intraarticular osteoid osteomas can simulate several other traumatic or degenerative pathologies of the joint with delay in diagnosis. We report the clinical features, radiographic and histopathological findings, the technical aspects of arthroscopic excision, and results of surgery in a 28-year-old woman who had an intraarticular osteoid osteoma of her left ankle, in whom the initial diagnosis was erroneous and delayed 1 year. Arthroscopy allowed minimally invasive complete excision of the osteoid osteoma, with a short postoperative rehabilitation and excellent functional results.