Causes of Sub-periosteal New Bone

Periostitis
- Associated with infection, osteomyelitis & subperiosteal abscess
Sub-periosteal haematoma
Syphilitic periostitis (diffuse or localised)
Ewings sarcoma (onion skin)
Osteoid osteoma (may result in localised thickening)
Hypertrophic pulmonary osteodystrophy associated with COAD, clubbing, cyaotic disorders
Stress fractures
Venous ulcers or stasis ulcers result in periosteal thickeing beneath ulcer
Caffeys disease
- Bone deposition sub-periostealy over wide area of many bones
- infantsless than 6/12, often have fever & resolves spontaneously