May Be Caused by

 Common

Avascular necrosis

Battered child syndrome

Bone islands

Bony callus

Chronic osteomyelitis

Healed osteomyelitis

Healed rib fractures

Osteitis condensans ilii

Osteoblastic metastases

Paget disease of bone

 Uncommon

Angiomatosis

Brown tumor of hyperparathyroidism

Caffey disease

Chondrodysplasia punctata

Enchondromatosis

Erdheim-Chester disease

Fibrous cortical defect

Fibrous dysplasia

Gardner syndrome

Gaucher disease

Heavy metal poisoning

Hereditary multiple exostoses

Langerhans cell histiocytosis

Leukemia

Lipodystrophy

Lymphoma

Maffucci syndrome

Mastocytosis

Melorheostosis

Mixed sclerosing bone dysplasia

Multiple enchondromas

Multiple myeloma

Nonossifying fibroma

Osteomas

Osteomesopyknosis

Osteopathia striata

Osteopoikilosis

Osteosarcomatosis

POEMS syndrome

Pyknodysostosis

Sarcoidosis

Sternocostoclavicular hyperostosis

Syphilis

Treated lytic bone metastases

Treated multiple myeloma

Tuberous sclerosis

Yaws