Which lab tests are used in the workup of bullous pemphigoid (BP)?

Updated: Oct 14, 2020
  • Author: Lawrence S Chan, MD; Chief Editor: Dirk M Elston, MD  more...
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Answer

To establish a diagnosis of bullous pemphigoid, the following tests should be performed: histopathologic analysis from the edge of a blister and DIF studies on normal-appearing perilesional skin. [2] If the DIF result is positive, indirect immunofluorescence (IDIF) is performed using the patient's serum. The preferred substrate for IDIF is salt-split normal human skin substrate.


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