Affiliation:
1. Trauma Research Center Baqiyatallah University of Medical Sciences Tehran Iran
2. Health Research Center, Life Style Institute Baqiyatallah University of Medical Sciences Tehran Iran
3. Department of Basic Medical Sciences Khoy University of Medical Sciences Khoy Iran
Abstract
Key Clinical MessageOsteochondromas (OCs) are developmental anomalies that originate from the periosteum and typically form during enchondral ossification near the joints. Retro‐patellar OC caused by exostosis forms in various intracapsular, intra‐tendon, and joint‐adjacent positions within the knee joint. In this case, a 19‐year‐old male presented with swelling and a mass in his left knee, which raised suspicion of bone tumors. After evaluating x‐ray images and conducting histopathological examinations, the diagnosis was confirmed as retro‐patellar OC.