Etiology the disease is unclear. Participation is considered cytotoxic T-lymphocytes directed against antigens in the area basal membranes. Illness has connection with chronic hepatopathies (hepatitis C andhepatitis D) and administration drugs (beta - blockers).
Clinical image
typical for lichen planus symmetrical sowing itchy, flat,shiny,polygonal,reddish-brown papule. On the surface papule they can be sometimes visible Wickham's stria – whitish drawing, which is conditional hypergranulosis. After healing papule they persist hyperpigmentation.
Predilection localization are :
lichen unguiumvolar parties wrist,
cross landscape,
insteps, ankles.
Clinical forms
Exanthematic form
Acts massive acute sowing petty cash papule mainly on hull which can go to erythroderma. He can be present asymptomatic whitish reticulated venation on buccal mucosa (up to half sick). At 10 % sick people occur and changes on nails
Lichen planus annularis
Speeches sometimes they can be grouped into rings. This form often affects genitalia.
Lichen planus mucosae
Manifests as painful erosions and scarring, especially around cavities oral and anu.
Lichen planopilaris
The emergence is characteristic follicularly bound and often confluent pointed hyperkeratotic red ones papule. He can lead to scarring alopecia.
Lichen unguium
Running out to thinning disc, deformation disk. Subungual hyperkeratosis they can lead up to total loss nails.
Lichen palmoplantaris
It is diffuse reddish-brown hyperkeratosis face and palm, sometimes with ulcerations
Lichen planus verrucosus
They arise verrucous elevated reddish brown bearings, often on shins.
mononuclear striped infiltrate in the upper corium penetrating into the lower ones parts epidermis, dermo- epidermoid the junction is not sharp, forming " teeth saws ",
