What are the Nikolsky sign and Asboe-Hansen sign in pemphigus vulgaris?

Updated: Jun 14, 2018
  • Author: Bassam Zeina, MD, PhD; Chief Editor: Dirk M Elston, MD  more...
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For the Nikolsky sign in patients with active blistering, firm sliding pressure with a finger separates normal-appearing epidermis, producing an erosion. This sign is not specific for pemphigus vulgaris and is found in other active blistering diseases.

For the Asboe-Hansen sign, lateral pressure on the edge of a blister may spread the blister into clinically unaffected skin.

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