Skin Biopsy Interpretation · Pathology

Which immunofluorescence finding is typical of bullous pemphigoid?

  1. Intercellular IgG deposition in epidermis
  2. Linear IgG deposition along basement membrane
  3. Granular IgA deposition in dermal papillae
  4. Absence of immune deposits
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Correct answer: Linear IgG deposition along basement membrane

Bullous pemphigoid shows linear IgG and C3 deposition along the basement membrane zone. This distinguishes it from pemphigus vulgaris, which shows intercellular staining.

Difficulty: Medium Question 4 of 20

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