An exceptional localisation of osteoid osteoma

Osteoid osteoma is a small tumor, always benign. Located preferentially on the long bones, femur and tibia, elbow location is rare. We present a case of an Osteoid osteoma in unusual subperiostal localization in the tip of the coronoid process. The lesion was removed by en bloc resection under CT-guidance. This approach enabled us to avoid damaging the proximal structures, to examine the lesion, and to fill the bony defect with autologus bone-graft. This presentation marks the first case reported in this precise subperiostal localization.