Quiz: Diagnosing the cause of a toe blister

A 45-year-old Caucasian female, otherwise well, presents with a 6-month history of a blister on the second toe of her right foot.

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Professor Murrell is head of dermatology, St George Hospital, and conjoint professor, University of NSW.

This article was co-authored by Michelle Hui, a final-year medical student at the University of NSW; and Dr Cathy Zhao, research fellow at St George Hospital, and conjoint associate lecturer, University of NSW.

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