Periosteal reactions
Slower growing processes the periosteum has of time to respond to the process can produce new bone as the lesion is growing solid, uninterrupted periosteal new bone along the margins of bone.
Types of periosteal reactions:
• Solid periosteal reaction along the cortex of a bone
• lamellated periosteal reaction
• “sunburst” and “hair-on-end” periosteal reaction
• Codman’s triangle
• complex pattern of periosteal reaction
Aetiology of solid periosteal reactions:
• infection
• benign neoplasms
• osteoid osteoma
• eosinophilic granuloma
• hypertrophic pulmonary osteoarthropathy
• deep venous thrombosis (lower extremity)
Aetiology of aggressive periosteal reaction
• osteomyelitis
• malignant neoplasms
• osteosarcoma
• chondrosarcoma
• fibrosarcoma
• lymphoma
• leukaemia
• metastasis
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