Uh...actinic keratosis is, uh, a premalignant lesion.
性角化病 呃 一种癌前病变。
However, most lip vermillion cancers result from chronic sun damage and are associated with actinic cheilitis, a precancerous rough patch on the lip.
但,多数唇红癌由慢性日损害导和日晒性唇炎(即嘴唇上出现癌前粗糙斑块)有关。
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