Can you nail the cause of this separation?

Oli is a four-year-old boy who is brought in by his mum for review of nail changes, present for the past month.

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. BMJ 2020; 369:2151
  2. Cutis 2017; 99(1):33-36