[Treatment of osteoid osteoma by CT-controlled percutaneous drill resection. Apropos of 27 cases].

Purpose Of The Study: Osteoid osteoma is a benign tumor requiring excision due to pain, usually severe and invalidating. Surgical "en bloc" resection is not always easy. Complete resection of the nidus is required to prevent recurrence while at the same time a limited resection should also be used to avoid a pathological fracture or a growth plate injury in children.