Skin Biopsy Interpretation · Pathology

Which finding is most characteristic of hidradenitis suppurativa on biopsy?

  1. Perifollicular granulomatous inflammation
  2. Squamous keratin pearl formation
  3. Pagetoid spread of melanocytes in the epidermis
  4. Linear subepidermal blistering with IgG deposition
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Correct answer: Perifollicular granulomatous inflammation

Hidradenitis suppurativa shows chronic inflammation and granulomatous reaction around hair follicles and apocrine glands. Sinus tract formation is common in advanced lesions.

Difficulty: Medium Question 20 of 20

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