Can you recognise this sign on X-ray?

Mark is a 62-year-old mechanic who presents with several months of worsening mid-thoracic back pain.

Test your clinical know-how by taking the quiz below. If you select the wrong answer, have another go — you can try as many times as you like!


Dr Kate Kelso is a GP and medical editor at Australian Doctor.

  1. Hacking C, et al. Ivory vertebra sign — Radiopedia
  2. Matthews G, Dyer RB.