[Lichen aureus or lichen purpuricus; about 5 cases; ultrastructural study].
Clinical, histological and ultrastructural features in five cases of lichen aureus are descirbed. This rare condition with ages ranging here from 6 to 31 consists of a pigmented papular and purpuric eruption. Unilaterally, trunk or limb may be involved, in a possible systematized distribution. The microscopic picture is characterized by a dense histiocytic and lymphocytic infiltration in the upper part of the dermis; extravasation of erythrocytes and iron pigment in the histiocytes are often noticed. In fine structure most cells of the dermal infiltrate are histiocytes (or macrophages) with numerous worm-like structures and even typical Langerhans granules in three cases; histiocytic cells; histiocytes are frequently seen in apposition to lymphocytes. In all these cases, no sign of histiocytosis X is found. Classification of lichen aureus in the group of idiopathic pigmented purpuric eruption is proposed.
D000293:Adolescent; D000328:Adult; D005260:Female; D006644:Histiocytes; D006801:Humans; D007801:Langerhans Cells; D008297:Male; D011693:Purpura / Q000473:pathology; D012871:Skin Diseases / Q000473:pathology*
Lichen aureus ou lichen purpuricus. a propos de 5 cas intérêt de l'étude ultra-structurale.