Truncal Rash with Islands of Sparing – Let’s Diagnose

A 68-year-old woman went to the doctor after noticing a rash that had developed on her trunk over the past few weeks. On examination, there were multiple confluent, orange-red plaques on the trunk and arms with “islands of sparing” within them. The rash had a primarily truncal distribution and was pruritic. She was otherwise feeling well.

Is it seborrheic dermatitis, pityriasis rubra pilaris, atopic dermatitis, or tinea corporis?

Can you diagnose the patient? Use the Differential Builder in VisualDx to help you.

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