Lichen Planus in Four Clinical Forms.

Lichen planus is an autoimmune disorder which comes under lichenoid reactions. It is T-cell mediated cytotoxic reaction directed against antigen expressed by basal cell layer of the oral mucosa. Autoreactive T-lymphocytes may be of primary importance for the development of oral lichen planus. Lichen planus presentations in the oral cavity are in 6 forms: Reticular, papular, plaque, bullous, erythematous and ulcerative. We present a case report of 4 forms in a patient.