Oral Lichen Planus
Pronunciation: LY-ken PLAY-nus
Also written as: OLP
A chronic inflammatory condition of the oral mucosa presenting in several morphological forms, including reticular, erosive, and atrophic subtypes.
Full Definition
Oral lichen planus (OLP) is an immune-mediated condition affecting the oral mucosa that may present as white lacy striae (Wickham's striae), erythematous patches, or painful erosions. It is classified as a potentially malignant disorder due to a small but documented risk of malignant transformation, particularly in the erosive form. Editors should note that OLP is not synonymous with lichenoid reactions, which are triggered by a specific identifiable cause such as a drug or dental restorative material. The distinction between OLP and oral lichenoid lesion (OLL) or oral lichenoid reaction (OLR) is clinically significant and must not be collapsed in editing. OLP is the accepted abbreviation and should be expanded on first use.
Usage
Usage note: Do not equate OLP with oral lichenoid lesion (OLL) or oral lichenoid reaction (OLR). These are distinct diagnoses with different aetiologies. Confirm subtype (reticular, erosive, atrophic, plaque-like, bullous, or papular) is clearly stated.
In Context
- "The reticular form of oral lichen planus (OLP) was identified by the presence of bilateral Wickham's striae on the buccal mucosa." — Clinical case note
- "Editors must distinguish OLP from oral lichenoid reactions caused by amalgam restorations." — Manuscript style note