英文：A localized thickening and enlargement of the horny layer of the skin.
中文：鸡眼, 老茧皮肤角质层的局部增厚和增大
英文：Death of cells or tissues through injury or disease, especially in a localized area of the body.
中文：坏死因创伤或疾病引起的细胞或组织的死亡, 尤其指身体局部面积的坏死
英文：A localized protective reaction of tissue to irritation, injury, or infection, characterized by pain, redness, swelling, and sometimes loss of function.
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