<unk>  is the most common nonhematologic primary malignant bone neoplasm causing 35% of primary bone malignancies and occurs  at any age, it usually affects patients in the second and third decade of life with a peak incidence between 13 and 16 years of age. It is the 8th leading cancer in children under age 15, comprising 2.4% of all malignancies in pediatric patients and about 20% of all primary bone cancers. The overall incidence of<unk>  in U.S. population under 24 years of age are estimated at 0.44 cases for 100,000 individuals.<unk>  is slightly more common in males than in females. Primary<unk>  typically occurs in young patients (10-20 years) with 75% occurring before the age of 20. Secondary<unk>  occurs in elderly patients.
Osteosarcoma epidemiology and demographics
Osteoma epidemiology and demographics
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Ewing's sarcoma epidemiology and demographics
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