Definitions for lichen planus
This page provides all possible meanings and translations of the word lichen planus
lichen planus, lichen ruber planus(noun)
an eruption of shiny flat-topped purplish (usually itchy) papules on the wrist and forearms and thighs
Lichen planus is a chronic mucocutaneous disease that affects the skin, tongue, and oral mucosa. The disease presents itself in the form of papules, lesions, or rashes. Lichen planus does not involve lichens, the fungus/algae symbionts that often grow on tree trunks; the name refers to the dry and undulating, "lichen-like" appearance of affected skin. It is sometimes associated with oxidative stress, certain medications and diseases, however the underlying pathology is currently unknown.
U.S. National Library of Medicine
An inflammatory, pruritic disease of the skin and mucous membranes, which can be either generalized or localized. It is characterized by distinctive purplish, flat-topped papules having a predilection for the trunk and flexor surfaces. The lesions may be discrete or coalesce to form plaques. Histologically, there is a "saw-tooth" pattern of epidermal hyperplasia and vacuolar alteration of the basal layer of the epidermis along with an intense upper dermal inflammatory infiltrate composed predominantly of T-cells. Etiology is unknown.
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"lichen planus." Definitions.net. STANDS4 LLC, 2014. Web. 20 Dec. 2014. <http://www.definitions.net/definition/lichen planus>.