Pathology · single question
The same patient has a well-circumscribed, asymptomatic dark mucosal spot at #28–29, not visible on radiographs. Most likely diagnosis:
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Correct answer: C. Physiologic (melanotic) macule
- A. Melanoma is irregular and concerning; a small, well-defined asymptomatic macule in a teen is far more likely benign.
- B. Amalgam tattoo usually relates to a restoration/extraction site and may be radiopaque if particles are large.
- C. Correct (keyed). A well-circumscribed, flat, asymptomatic pigmented spot that is radiographically invisible fits a physiologic melanotic macule.
- D. A varix is a bluish vascular dilation (often ventral tongue/lip), blanchable, not a flat brown macule.