日にっ光こう角かく化か症しょう

noun

actinic keratosis; solar keratosis

Medical term for a rough, scaly patch on the skin caused by years of sun exposure; also called senile keratosis.

• 日にっ光こう角かく化か症しょうは、長なが年ねんの紫し外がい線せん暴ばく露ろが原げん因いんで起おこる皮ひ膚ふの前ぜんがん病びょう変へんです。

  Actinic keratosis is a precancerous skin lesion caused by years of UV exposure.