Radiology · single question

On a panoramic radiograph an arrow points to a bone forming the posterior base of the skull. Which bone is indicated?

  1. Sphenoid
  2. Ethmoid
  3. Occipital
  4. Temporal
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Correct answer: D. Temporal

  • A. INCORRECT. The sphenoid lies in the central skull base, not the structure indicated here.
  • B. INCORRECT. The ethmoid sits between the orbits in the anterior cranial base.
  • C. INCORRECT. The occipital forms the most posterior cranial floor but is not the structure marked on this panoramic image.
  • D. CORRECT. The arrowed structure on this panoramic film corresponds to the temporal bone region of the posterior skull base.

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