Recurrent retroauricular cystic nodules: lichen planus follicularis tumidus

Dermatol Online J. 2018 Oct 15;24(10):13030/qt9hz4n3gx.

Abstract

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.

Publication types

  • Case Reports

MeSH terms

  • Aged
  • Humans
  • Lichen Planus / diagnosis
  • Lichen Planus / pathology*
  • Male
  • Scalp Dermatoses / diagnosis
  • Scalp Dermatoses / pathology*

Supplementary concepts

  • Lichen planus follicularis