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Figure 2: Histological and immunohistochemical features of the first case. (a) Nevus sebaceous (H and E original magnification ×40). (b) Verruca vulgaris (red circle on the Figure 1) (H and E original magnification ×20). (c) Poroma (green circle on the Figure 1) (H and E original magnification ×100). (d) Basal cell carcinoma (H and E original magnification ×20). (e) CD10 positivity in the basaloid cells (CD10 immunoperoxidaseAEC staining original magnification ×100). (f) High proliferation index in basal cell carcinoma cells (Ki67 immunoperoxidaseAEC staining original magnification ×400) 
