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Open Access Publications from the University of California

Recurrent retroauricular cystic nodules: lichen planus follicularis tumidus

  • Author(s): Chau, Thinh
  • Amini, Nima
  • Eisen, Daniel B.
  • Fung, Maxwell A.
  • et al.
Creative Commons 'BY-NC-ND' version 4.0 license

Lichen planus follicularis tumidus (LPFT) is a rare subtype of lichen planus (LP) that has been most commonly described in middle-aged women. LPFT clinically manifests as recurrent cystic follicular nodules that preferentially involve the retroauricular area; concurrent classic LP lesions on the extremities and mucosal surfaces may also be present. Histologically, LPFT demonstrates epithelial-lined follicular cysts filled with orthokeratotic keratin surrounded by a dense lichenoid infiltrate. We present a case of a 67-year-old man with clinical and histopathologic findings consistent with LPFT and discuss differential diagnostic considerations for entities resembling LPFT. Lastly, treatment options for LPFT are reviewed.

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