Retraction or perforation?
Sam, 27, presents with a three-month history of left-sided hearing loss and aural fullness.
This is part 1 of a two-part quiz on the tympanic ear. Click here for part 2.
Each week, How to Treat publishes a clinical picture quiz.
The quiz has no CPD points attached, it's just for fun.
Take the quiz below, see how you fare against your peers and share your results via social media:
Dr Ryan is an ENT registrar at Royal North Shore Hospital,