Causes parallel spiculated

Which of the following causes parallel spiculated (hair-onend) rather than divergent speculated (sunray) periosteal reaction?

  1. Osteosarcoma
  2. Ewing’s sarcoma
  3. Sigmoid colon cancer metastasis
  4. Hemangioma
  5. Meningioma

View Explanation

Other causes include syphilis and infantile cortical hyperostosis.