Lichen Planus
Lichen Planus Definition : Lichen planus is an acute or chronic inflammatory dermatosis involving skin and/or mucous membranes, characterized by flat-topped, pink to violaceous, shiny, pruritic polygonal papules on the skin and milky white reticulated papules in the mouth. The term ‘ lichenoid ’ is used by clinicians to describe a flat-topped, shiny, papular eruption resembling lichen planus (LP), or by histopathologists to describe a type of tissue reaction consisting principally of basal cell liquefaction and a band-like inflammatory cell infiltrate in the papillary dermis 4 . 6 Ps : 1. Pruritic 2. Purple. 3. Polygonal. 4. Polished. 5. Planar. 6. Papules/plaques. Other P: Pletiful 3 . Epidemiology : Age of onset: 30 to 60 years. Sex: Females > Males 1 , Male = Female 2 . Race: Hypertrophic LP > Blacks. Prevalence: Estimated < 1% of general population, Worldwide 0.14% to 0.80%, US 0.44% 2 . ...