Histological features of LP (a) Epidermal hyperkeratosis and accumulation of hyaline material in dermis (H and E x 40). (b) A skin biopsy was performed from the hyperkeratotic plaque on the right elbow, revealing epidermal hyperkeratosis, eosinophilic, amorphous, infiltrate throughout the dermis and thickening of basement membrane (Figures 3(a) and 3(b)). The infiltrate showed strong staining with periodic-acid Schiff (PAS (+)) (Figure 3(c)).
