Definition

Noun: * A chronic, inflammatory skin condition characterized by the eruption of small, shiny, flat-topped, purplish (and usually itchy) papules, commonly appearing on the inner wrists, forearms, shins, and thighs. It is an autoimmune disorder that can also affect mucous membranes.

Usage Examples

• Noun:
  • The dermatologist diagnosed the persistent rash on her wrists as lichen planus.
  • Lichen planus can cause significant itching and discomfort.
  • Oral lichen planus may present as white, lacy patches inside the cheeks.

Advanced Usage

• "Eruption of lichen planus": Refers to the sudden appearance or outbreak of the characteristic lesions.
  • The patient presented with a widespread eruption of lichen planus following a period of high stress.
• Used attributively (as a noun modifier) to describe related concepts:
  • The lichen planus lesions were biopsied for confirmation.
  • She is undergoing treatment for lichen planus symptoms.

Variants and Related Words

• Lichenoid (adj): Resembling lichen planus. Used to describe a rash or reaction pattern that shares features with lichen planus.
  • The drug reaction caused a lichenoid eruption on the skin.

Synonyms

• Lichen ruber planus: An older, full medical term for the same condition.

Notes on Different Meanings

• This is a specialized medical term. The word "lichen" in this context refers to the appearance of the skin lesions, which can resemble certain types of lichen (a symbiotic organism of algae and fungus) found on rocks and trees. It is not related to the common meaning of "lichen" in botany/ecology.

Noun

1. an eruption of shiny flat-topped purplish (usually itchy) papules on the wrist and forearms and thighs