单词	hyperkeratosis
释义	hyperkeratosis /ˌhʌɪpəkɛrəˈtəʊsɪs / noun [mass noun] Medicine Abnormal thickening of the outer layer of the skin.Most leukoplakias are caused by hyperkeratosis or a thickening of the outer keratin layer.... Skin biopsy typically reveals hyperkeratosis and follicular plugging, with superficial and deep lymphocytic infiltrates. Their clinical symptoms were primarily hyperkeratosis and hyperpigmentation, which are well-recognized signs of arsenicalism.
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