ABSTRACT
The authors report two cases of diaphyseal osteoid osteoma; the first case is femoral; whereas the second is tibial. The symptomatology is classical; manifesting by acute night-pains relieved by non steroidal anti-inflammatory drugs. Standard X-rays showed cortical hypertrophy; but the nidus was shown on the CT scan; which also allowed thelocalization of the lesion. Firstly; the mode was minimal compared to the nidus. Surgical excision removed a limited band of bone cortex. The results were reviewed after a minimum followup of 12 months. This method of treatment indicated safety; satisfactory and efficient symptom relief. Cure was obtained at first attempt; so allowing an immediate resumption of activities and a short immobilization of the patient