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

• Published in: Clinical case reports Vol. 11; no. 8; pp. e7751 - n/a
• Main Authors: Pirmohamadi, Hosein, Rahimi, Mohsen, Meibodi, Mohammad Kazem Emami, Akbaribazm, Mohsen
• Format: Journal Article
• Language: English
• Published: England John Wiley & Sons, Inc 01.08.2023; John Wiley and Sons Inc; Wiley
• Subjects: Arthritis; Bones; Calcification; Cartilage; Case Report; Case reports; Chronic pain; Consent; Edema; Editing; exostosis; Knee; knee joint; Ligaments; osteochondromas; patellar ligament; radiography; Supervision; Tumors; Writing; osteochondromas; radiography; patellar ligament; knee joint; exostosis
• ISSN: 2050-0904; 2050-0904
• DOI: 10.1002/ccr3.7751

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. x‐Ray image of the left knee joint. Multiple OC within the patellar tendon. Bone wear (asterisk) is evident at the femoral condyle and tendon attachment to the tibial tuberosity. F, femur; Fi, fibula; OC, OC masses; P, patella; PL, patellar ligament; T, tibia; TT, tibial tuberosity.