Quiz: Suspicious marks

When an eight-year-old boy presents to the ED after a fall, the emergency doctor notices a suspicious blue-grey coloured patch on the boy’s back.

Take the quiz:


Professor Murrell is head of the department of dermatology, at St George Hospital, Sydney, and professor at the University of NSW.

This article is co-authored by Emma Kim, a fourth-year medical student, and Dr Cathy Zhao, a dermatology research fellow.