Pathology · single question
Which clinical sign is characteristic of pemphigus vulgaris?
Show answer and explanation
Correct answer: A. Positive Nikolsky sign
- A. Correct. A positive Nikolsky sign (epithelium sloughs with lateral pressure) reflects the intraepithelial acantholysis of pemphigus.
- B. Incorrect. The Auspitz sign (pinpoint bleeding after scale removal) is seen in psoriasis.
- C. Incorrect. Koplik spots are pathognomonic for measles.
- D. Incorrect. Wickham striae (fine white lines) are seen in lichen planus.