Plane lichen

See also: Lichen (homonymy)

The lichen plan (Latin: lichen planus) is a auto-immune Maladie concerning in general the Peau, the Bouche, or sometimes both.

Origins

The plane lichen can have many causes, which are not yet given. Reactions known as “lichénoïdes”, which present aspects of the plane lichen, were identified. They are related to reactions allergic to the drugs against hypertension, the weaknesses cardiac, arthritis and certain anti-epileptics. One also speaks about “infection lichénoïde of the mucous membranes” or about “dermatite lichénoïde”.

The plane lichen is also a complication of the chronic Hépatite C. Studies tried to analyze the reactions of the plane lichen to the stress, which seems to intensify it.

The plane lichen assigns the women mainly (3 women infected for 2 men), and is more often presented in the adult: the infantile form is rare.

Clinical aspects

The aspect of the plane lichen is random - disease car immune - probably related to the stress. It presents a brutal beginning, making think of an allergy: the skin covers exémato-squameuses papules, which itch the patient.

The plane lichen can be generalized or be confined on a small surface of skin. Pains muscular, rheumatic, can accompany the pushes by plane lichen. The disease can extend from 12 to 15 month.

The lesions dry with a treatment containing corticoids in local applications ( DERMOVAL ), or by photo-chemotherapy. They leave sometimes purplished spots, which grow blurred with difficulty with time.

Differential diagnosis

The plane lichen can present symptoms similar to those of other affections, for example:
  • a reaction lichénoïde with the drugs;
  • érythematose discoidal;
  • chronic ulcerative stomatitis;

A Biopsie makes it possible to identify histological data, which can make it possible to distinguish the plane lichen from other similar diseases.

Treatments

Diprosone (30g) in the form of pomade in local application for the skin or Buccobet by oral way for the interior of the mouth and under medical regulation by a dermatologist or a ORL. Xylocaïne viscous with 2% is a treatment anaesthetizing while waiting for an improbable remission of the disease in the cases of medicamentous allergy impossible to circumvent (treatments against the epilepsy, in particular Lamictal).

Lichen planopilaris

External bonds

  • Bonds towards illustrations of Lichen planus (Hardin MD/Univ off Iowa)

  • Lichen planus-like cutaneous lesions
  • plane Lichen on atlas-dermato.org

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