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Between 1987 and 1999 we diagnosed and treated 110 patients with osteoid osteoma. Sixty patients were younger than 20 years. One hundred and four patients had characteristic pain at night. The mean duration of symptoms before surgery was 16 months. One hundred and four symptomatic patients were treated operatively with either wide resection or curettage. Ninety-one patients had immediate and complete relief of pain. The average follow-up was 2.5 years.Résumé Entre 1987 et 1999 nous avons traités 110 malades souffrant d'un ostéome osteoide. 60 malades étaient âgés de moins de 20 ans. 104 malades avaient la douleur nocturne caractéristique. La durée moyenne de symptô-mes avant la chirurgie était de 16 mois. 104 malades symptomatiques ont été opérés avec résection large ou curetage. 91 malades ont eu un soulagement immédiat et complet des douleurs. La moyenne de suivi était de 2.5 années.

The recurrence rates of primary ABC seemed to be higher in younger children. Considering the high cure rates with intralesional procedures even after recurrence, we suggest less aggressive intralesional procedures even in patients with mentioned risk factors; however, the patients' family should be informed about the high probability of recurrence.