May Be Caused by

 Common

Bone infarct

Idiopathic

Normal neonate

Osteopetrosis

Paget disease of bone

Sickle cell disease

 Uncommon

Acromegaly

Bone diseases with a split or double layer cortex

Chronic osteomyelitis with sequestrum and involucrum

Erdheim-Chester disease

Heavy metal poisoning

Hypervitaminosis D

Leukemia

Metastasis

Oxalosis

Prostaglandin E1 therapy

Pyogenic osteomyelitis

Radiation osteitis

Reflex sympathetic dystrophy

Subcortical osteoporosis

Subperiosteal hemorrhage

Syphilitic osteomyelitis

Thorotrast