Figure 3
Keywords: Lichen planus, Histopathology-image, Pathology
Scanning power view of lichen planus shows a lichenoid reaction pattern (Figure 1) characterised by the combination of degeneration of the basal layer of the epidermis and a band like lymphocytic infiltrate obscuring the dermoepidermal junction. There is irregular epidermal hyperplasia forming a characteristic saw-tooth appearance with wedge-shaped hypergranulosis (Figures 1 and 2). The basal layer of the epidermis exhibits vacuolar degeneration with typically prominent necrosis of individual keratinocytes (Figure 3). The inflammatory infiltrate is chiefly lymphocytic and forms a dense band in the superficial dermis (Figure 4).
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