《英文msh詞典》Lichen Rubra Planus
[入口詞] Lichen Rubra Planus
[主題詞] Lichen Planus
[英文釋義] 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.