DermDx: Brown Patch on Upper Back A 58-year-old woman presents with a 2-year history of persistent itching and burning localized to a patch on her upper back.

A 58-year-old woman presents with a 2-year history of persistent itching and burning localized to a patch on her upper back. What is the diagnosis? Test yourself with our #DermDx quiz here⬇️ bit.ly/427sZrN

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