How is the inflammatory infiltrate characterized in hidradenitis suppurativa (HS)?

Updated: Nov 20, 2020
  • Author: Marina Jovanovic, MD, PhD; Chief Editor: William D James, MD  more...
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The inflammatory infiltrate is composed of neutrophils, lymphocytes, plasma cells, and, occasionally, eosinophils. Active inflammation around the sweat glands is less common than inflammation around the hair follicles. The histologic features reveal inflammation of the apocrine glands in only 33% of cases. Apocrinitis only evolves by extension of the inflammatory process. [41] Apocrine gland destruction by neutrophils is occasionally observed. Abscess formation occurs, leading to destruction of the pilosebaceous unit and, eventually, the other adnexal structures. Apoeccrine glands (present in axillae), which drain directly on the epidermal surface, appear intact and not inflamed. [13]

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