EA91.1

ICD-11 MMS 2026-01

Hypertrophic lichen planus

Description

A chronic recalcitrant form of lichen planus often localised to the lower legs and ankles and characterised by plaques of markedly thickened skin. It is often extremely pruritic. It can leave permanent pigmentation and scarring.

Index terms

  • Hypertrophic lichen planus
  • Lichen planus hypertrophicus

Exclusions from above levels

  • 1B72.0 – Bullous impetigo of the napkin area
  • 1F23.12 – Napkin candidosis
  • EH71 – Dermatoses precipitated by drug therapy
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  • EH76 – Dermatoses associated with specific classes of medication

Sibling codes

  • EA91.0 – Acute eruptive lichen planus
  • EA91.2 – Follicular lichen planus
  • EA91.3 – Lichen planus of genital skin and mucous membranes
  • EA91.4 – Lichen planus and lichenoid reactions of oral mucosa
  • EA91.5 – Lichen planus of the nails
  • EA91.6 – Subacute lichen planus
  • EA91.Y – Other specified lichen planus
  • EA91.Z – Lichen planus of unspecified type

Foundation entity

Hypertrophic lichen planus – http://id.who.int/icd/entity/1096967508

Part of: EA91: Lichen planus › 14: Diseases of the skin