May Be Caused by

Avascular necrosis

Bone cyst

Bone infarct

Bone island

Brown tumor of hyperparathyroidism

Callus

Chondroid lesion

Chondrosarcoma

Chronic or healed osteomyelitis

Condensing osteitis of clavicle

Enchondroma

Eosinophilic granuloma

Ewing sarcoma

Fibrous cortical defect

Fibrous dysplasia

Garré sclerosing osteomyelitis

Granuloma

Hyperostosis frontalis interna

Idiopathic sclerosis

Langerhans cell histiocytosis

Leukemia

Lymphoma

Mastocytosis

Melorheostosis

Meningioma

Mycetoma

Nonossifying fibroma

Ossifying fibroma

Osteitis condensans ilii

Osteoblastic metastasis

Osteoblastoma

Osteochondritis dissecans

Osteochondroma

Osteoid osteoma

Osteoma

Osteosarcoma

Paget disease of bone

Parosteal sarcoma

Plasma cell granuloma

Radiation

Removal of an intramedullary rod

Sternocostoclavicular hyperostosis

Stress fracture

Syphilis

Treated lytic bone metastasis

Tropical ulcer

Tuberculosis

Yaws