1 MCQs in Medicine for NEET PG
A 42-year-old Indian woman presents with progressive fatigue, weight loss, and salt craving over 3 months. On examination, she has generalized hyperpigmentation, particularly striking over the **buccal mucosa (marked A)**, palmar creases, and knuckles. Her 8 AM serum cortisol is 2.2 mcg/dL. Which of the following best explains the pathophysiology of the buccal mucosal hyperpigmentation marked **A**?
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