Pathology · single question
A 16-year-old with methamphetamine use has mucosal pigmentation on the gingiva and palate. What is the MOST likely cause?
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Correct answer: B. Minocycline use
Minocycline (a tetracycline antibiotic) causes systemic pigmentation of oral mucosa, bone, and teeth. It's commonly given to adolescents for acne. The pigmentation appears black/blue on gingiva and palate. Methamphetamine causes xerostomia and rampant caries ('meth mouth') but not mucosal pigmentation. Addison's causes diffuse pigmentation differently.