Samehada (Shark Skin)

Japanese: さめ肌(鮫肌) - さめはだ

A slang term for a particular dry, coarse condition of the skin. Generally, it refers to the changes that correspond to the Western term fish skin and the Japanese name ichthyosis, but some interpret it literally as "shark skin" and refer to it as lichen pilaris, and some even expand it to include goose skin. Ichthyosis is a disease characterized by dry, coarse, and fish-scale-like changes to the skin, and there are many types, but to date there has been no international consensus on its classification.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

皮膚の特殊な乾燥，粗糙（そぞう）化(ざらざらになること)した状態の俗称。一般には欧米のfish skin，日本名の魚鱗癬（ぎよりんせん）ichthyosisに当たる変化を指すが，これを文字どおり〈サメの肌〉と解釈して毛孔性苔癬lichen pilarisを当てる向きや，さらに拡大して鳥肌goose skinまで含める見解もある。魚鱗癬は皮膚の乾燥，粗糙化と魚鱗様変化の出現を特徴とする病気で，種類も多いが，今日までその分類は国際的に統一をみていない。

出典　株式会社平凡社世界大百科事典第２版について　情報

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