The afflicted may have relatively small amounts of pain that will quickly increase in severity over a time period of 6–12 weeks. The skin temperature around the bone may increase, a bony swelling may be evident, and movement may be restricted in adjacent joints. Spinal lesions may cause quadriplegia and patients with skull lesions may have headaches. Sites Commonly affected sites are metaphyses of vertebra, flat bones, femur and tibia. Approximate percentages by sites are as shown: * Skull and mandible (4%) * Spine (16%) * Clavicle and ribs (5%) * Upper extremity (21%) * Pelvis and sacrum (12%) * Femur (13%) * Lower leg (24%) * Foot (3%)
Aneurysmal bone cyst
Bone cyst
Osteoid osteoma
Unicameral bone cyst
Juvenile active ossifying fibroma
Osteoma
Osteochondroma
Peripheral ossifying fibroma