<unk>  <unk>  constitute approximately 3% of all bone tumors. Adolescents and children are most affected by<unk> . The age distribution of<unk>  is between 5-15 years. Men are more commonly affected compared to women, with a 2:1 ratio. In 1942, Jaffe and Lichenstein later recognized it as a distinct entity. The exact pathogenesis of<unk>  is not fully understood.<unk>  may have association with genetic abnormalities on chromosome 4, 6, 8, 16, 21, and both chromosomes 12. The bones often involved are proximal femur, distal tibia, ilium, calcaneus, and occasionally metacarpals, phalanges, or distal radius.<unk>  typically occur in the metaphysis adjacent to the physis of the long bones. The hallmark of<unk>  is pain, swelling and pathological fracture. The mainstay of treatment for<unk>  is surgery in form of curettage and bone grafting.
Unicameral bone cyst
Intraosseous lipoma
Aneurysmal bone cyst
Osteoid osteoma
Osteochondroma
Myositis ossificans
Hypertrichotic osteochondrodysplasia
Accessory navicular bone