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(a) The epidermal layer is characterized by a mild degree of papillomatosis, acanthosis, and focal mixed orthokeratotic and parakeratotic hyperkeratoses. The underlying papillary and reticular dermis shows a marked fibrotic change associated with a chronic mononuclear perivascular inflammatory infiltrate (H&E, 100x magnification). (b) A moderate mononuclear chronic infiltrate is present around adnexal structures (H&E, 100x magnification).
