Spot Dx — Can you puzzle out these painful, pruritic lesions?

A 58-year-old lady presents with an episode of erythematous papulovesicular rash, which first appeared as weeping blisters on her back after an episode of sunburn when she was 18.

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!