Same case (hairy tongue). If biopsy were needed, what type would be used?

Correct answer: D. Incisional biopsy

• A. ❌ FNA is for cystic lesions or lymph nodes.
• B. ❌ Excisional biopsy removes the entire lesion — not appropriate for large dorsal tongue involvement.
• C. ❌ Immunofluorescence biopsy is specifically for immunobullous diseases (pemphigus, pemphigoid).
• D. ✅ Correct. If biopsy of hairy tongue were required, an incisional biopsy (representative sample) would be used. In practice, biopsy is rarely needed as the diagnosis is clinical.

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