Tumor

Key Radiographic Findings
1-Cortical destruction, 2-Periostitis, 3-Zone of transition

• Benign:
  1-No cortical destruction
  2-Benign periostitis: thick wavy, uniform or dense = low-grade chronic irritation
  3-Narrow zone of transition; can be traced with a pencil
• Malignant:
  1-Cortical destruction
  2-Aggressive periostitis: lamellated (onion-skinned), amorphous, sunburst
  3- Wide zone of transition; imperceptible
• Permeative lesions (multiple small holes): not easily categorized as benign vs malignant: multiple myeloma, primary lymphoma of bone, Ewing's sarcoma

See BoneTumor.org for Tumor info