The following are histopathological terms correctly matched with their meanings:
A. Parakeratosis: where nucleated cells are found in the superficial epidermisParakeratosis: where nucleated cells are found in the superficial epidermis. Parakeratosis is where nuclei of keratinocytes persist as they rise into the horny layer of the skin; it occurs normally in the epithelium of mucous membranes. When it occurs on the external skin it constitutes a lesion. Maturation is where naevus cells migrate into the dermis. Peripheral pallisading is classically seen in basal carcinoma and occasionally ‘basi-squamous’ carcinoma (a controversial diagnosis). Neither erythroplakia nor leukoplakia are histopathological terms - they denote clinical appearances, although they are both correctly defined.