Introduction: Osteoid osteoma is a benign osteoblastic lesion occurring in the diaphysis of the long bones most commonly. Patellar osteoid osteoma is very rare and most commonly associated with anterior knee pain.

Case report: A 21-year-old male presenting with anterior knee pain was diagnosed to have patellar osteoid osteoma after 4 years of onset of symptoms and was treated with radiofrequency ablation. One year following the ablation patient remains pain-free and has a complete range of movements.

Conclusion: Atypical location of the tumor makes it difficult to diagnose resulting in delayed management. Hence, it is important to have patellar osteoid osteoma as one of the differential diagnosis in patients having chronic anterior knee pain. Radiofrequency ablation is a novel and minimally invasive procedure for the treatment of Patellar Osteoid Osteoma which can help in resolution of anterior knee pain.

Keywords: Patella; anterior knee pain; osteoid osteoma; radiofrequency ablation.

Copyright: © Indian Orthopaedic Research Group.

简介： 骨样骨瘤是一种良性成骨性病变，最常见于长骨的骨干。髌骨骨样骨瘤非常罕见，并且通常与前膝痛相关。

病例报告： 一名21岁男性患者因前膝痛就诊，在症状出现4年后被诊断为髌骨骨样骨瘤，并接受了射频消融治疗。术后一年，患者的疼痛完全消失，且关节活动范围恢复正常。

结论： 肿瘤的非典型位置使其难以确诊，导致管理延迟。因此，在慢性前膝痛患者中应将髌骨骨样骨瘤作为鉴别诊断之一。射频消融是一种治疗髌骨骨样骨瘤的新颖且微创的方法，有助于缓解前膝痛。

关键词： 髌骨；前膝痛；骨样骨瘤；射频消融。