What's causing this everlasting rash?

A 34-year-old woman presented with a 15-year history of a widespread hyperpigmented macular rash with a reticular network, associated with left-sided cervical lymphadenopathy. 

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!


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

The quiz was co-authored by Dr Genevieve Ho, a dermatology registrar at St George Hospital; and Brandon Tan, a medical