骨髓炎是一種骨骼發炎的疾病，通常以髓腔感染開始，迅速涉及到哈氏系統， 並迅速延伸到該區域的骨膜。骨髓炎的原因包括慢性感染後或在股骨外傷後在股骨 中發展。當抗生素產生抗藥性，或引流效果差的時候，急性骨髓炎可能變成慢性骨 髓炎。常規放射線檢查，骨髓培養，骨活組織檢查，電腦斷層掃描（CT）和核磁共 振（MRI）在臨床上是常用的診斷工具。在這個案例中，我們提出一例最初被診斷 為骨瘤，最後被診斷為慢性骨髓炎，並通過骨外科清創手術加上抗生素治療成功治 療的案例。

Osteomyelitis is an inflammatory disease of the bone that usually begins as an infection of the medullary cavity, rapidly involves the haversian system, and quickly extends to the periosteum of the area. It develops in the femur bone after a chronic infection or for a variety of other reasons such as trauma to the femur. When antimicrobial agents or drainage prove unsuccessful, acute osteomyelitis may become chronic. Conventional radiography, culture, bone biopsy, computed tomography (CT), and magnetic resonance imaging (MRI) are used for its diagnosis. In this report, we present a case that was initially diagnosed as osteoid osteoma and finally diagnosed with chronic osteomyelitis, which was successfully treated with surgery and antibiotic treatment.