[Osteoid osteoma of the coronoid process causing flexion contracture of the elbow]

Osteoid osteoma is one of the benign osteoblastic lesions that causes chronic pain. Diagnosis may be delayed in juxta-articular lesions in which characteristic radiographic findings may not be present, resulting in limited joint motion. A 23-year-old patient presented with a complaint of pain in the right elbow of one-year history. He sought medical treatment at another center and was prescribed non-steroidal anti-inflammatory treatment that resulted in significant pain relief; however, limitations of elbow motion ensued. On physical examination, there was pain in the antecubital part of the right elbow on palpation and a flexion contracture of 30 degrees. Findings of computed tomography and magnetic resonance imaging were consistent with osteoid osteoma. The lesion was excised and postoperative controls showed no flexion contracture.