An osteoid osteoma is a small benign bone tumor of young adults, usually involving the appendicular skeleton’s extra-articular portions of the lower limbs and spine, causing inflammatory pain of nocturnal recrudescence. We present the case of a 16-year-old patient with a rare intra-articular osteoma location of the distal humerus, complicated by a reactive arthritis. This condition can provoke irreversible functional impotence in case of delayed diagnosis and management. Ambulatory CT-guided percutaneous radiofrequency thermo-ablation, which is less invasive than surgical options, has become the gold treatment standard. This case report illustrates the atypical clinical, diagnostic, and therapeutic features of this rare pathology.
Osteoid osteoma, benign tumor, percutaneous thermo-ablation, inflammatory synovitis, elbow, CT-control