Physiological pigmentation in a child — what does this represent?

Correct answer: A. Normal finding (melanin pigmentation in gingiva/oral mucosa, common in many ethnicities)

• A. Correct. Physiologic (racial/ethnic) pigmentation is a common, benign, normal finding of melanin deposition in the gingiva/oral mucosa, particularly in individuals with darker skin tones, requiring no treatment.
• B. Addison's disease would present with more diffuse, progressive pigmentation associated with systemic symptoms (fatigue, hypotension), not an isolated benign childhood finding.
• C. Peutz-Jeghers syndrome presents with characteristic perioral/labial pigmented macules associated with GI polyposis, a distinct syndromic presentation.
• D. Melanoma would present as an irregular, evolving, concerning pigmented lesion, not symmetric physiologic pigmentation.