1 MCQs in Dermatology for NEET PG
A 14-year-old girl presents with a solitary lesion on her upper back. Dermoscopy reveals a 4 mm evenly pigmented nevus surrounded by a sharply demarcated, symmetric, chalk-white depigmented zone approximately 2 mm wide. The structure marked **B** in the diagram is most consistent with this clinical presentation. Which of the following best describes the pathophysiologic mechanism underlying this lesion?
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