Onion skin appearance is seen in_______________?

Correct answer: A. Ewing's sarcoma

  • A. Ewing's sarcoma
  • B. Osteosarcoma
  • C. Osteoma
  • D. Fibro sarcoma

Explanation

Ewing sarcoma classically causes an onion-skin periosteal reaction due to repeated layers of reactive new bone formation. Osteosarcoma more typically shows a sunburst pattern or Codman triangle.

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