Papagrigorakis, Eftychios A Rare Cause of Anterior Knee Pain in a Young Athlete and a Delayed Diagnosis: Osteoid Osteoma of the Patella. [electronic resource] - Cureus Dec 2019 - e6420 p. digital Publication Type: Case Reports; Journal Article ISSN: 2168-8184 Standard No.: 10.7759/cureus.6420 doi