What's behind this suddenly bruised finger?

Anna, a generally well 45-year-old receptionist, presents with spontaneous bruising affecting her left ring finger.

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 Case Rep 2020; 13:e238156