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Figure 2: Multiple serial cuts of the biopsy showing various stages of the lesion. (A) Biopsy lined by hyperplastic hyperkeratotic epidermis with multiple epidermal invaginations (H and E, 40). (B) Invagination containing parakeratotic scale crust with basophilic debris (H and E, 100). (C) Site of perforation with adjacent dermis showing granulomatous reaction (H and E, 100). (D) Pseudoepitheliomatous hyperplasia of the surrounding epidermis seen to cover the above process from its base (H and E, 40)

Figure 2: Multiple serial cuts of the biopsy showing various stages of the lesion. (A) Biopsy lined by hyperplastic hyperkeratotic epidermis with multiple epidermal invaginations (H and E, 40). (B) Invagination containing parakeratotic scale crust with basophilic debris (H and E, 100). (C) Site of perforation with adjacent dermis showing granulomatous reaction (H and E, 100). (D) Pseudoepitheliomatous hyperplasia of the surrounding epidermis seen to cover the above process from its base (H and E, 40)