Erythematous patches appear months after surgery

Lena, 46, presented with a 10-day history of a rash affecting her right shoulder and upper arm.


Each week, How to Treat publishes a clinical picture quiz.

The quiz has no CPD points attached, it's just for fun.

Have an interesting clinical picture quiz? Click here to email the editor. We pay $200 for each quiz.

Take the quiz below, see how you fare against your peers and share your results via social media: