Rare retro‐patellar multiple osteochondromas in patellar tendon: A case report.

Key Clinical Message: Osteochondromas (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. [ABSTRACT FROM AUTHOR]