Osteoid Osteoma Wheeless

Description: Discussion: - benign osseous tumor usually less than 1.5 cm in diameter, comprising 11% of all benign bone tumors; - no cases of malignant transformation has been reported; - occurs primarily in adolescents and less often in children; - it is rare in patients over age 40 yrs; - presenting symptom is well localized pain which may be more severe at night & is relieved by aspirin or other prostaglandin inhibitors; - because osteoid osteoma is a vascular tumor, substances which cause vasodilitation such as alcohol may precipitate an acute pain crisis; - location: - most common site is proximal femur, & diaphysis of long bones; - less often: foot (talus, navicular, or calcaneus) & in posterior spine