Can you spot the cause of this baby's vomiting?

Callum is a four-month-old who has been brought in by his parents after 12 hours of vomiting and lethargy.

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 2015; 6 Jan