Sir.—Osteoid osteoma is a benign bone tumor that principally affects men in the second decade of life. The clinical manifestations include a characteristic pain with nocturnal exacerbations that recedes or disappears after taking aspirin. In addition, muscular atrophy in the affected extremity and functional impairment are noted. If the tumor is located in the vertebrae, scoliosis can result. The most frequent locations are the femur, tibia, vertebrae, and humerus. A preliminary diagnosis can be made clinically, but confirmation is made by the visualization of the pathognomonic bone lesion, which is the "nidus" surrounded by an area of sclerosis. After surgical treatment, pathological study can confirm the diagnosis by examination of biopsy specimens.
We present a series of patients with osteoid osteoma in whom computed tomography assisted in diagnosis of the lesions.
Patient Reports.—Six children ranging in age from 3 years 5 months to 12 years 6 months