Actinic keratosis

Japanese: actinic keratosis(英語表記)actinickeratosis
Actinic keratosis

...In rare cases, exposure to ultraviolet light, trauma, radiation, or ingestion of arsenic can be a trigger, but this is less common than squamous cell carcinoma.
[Other skin cancers]
Actinic keratosis is an intraepidermal cancer that occurs in chronic sun dermatitis on the face, back of the hands, etc. It is more common in Caucasians, but is rarely seen in elderly Japanese. It is pale pink with scales (dandruff-like skin flakes), and the skin at the edges often atrophies and has dilated capillaries.

*Some of the terminology that mentions "actinic keratosis" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…まれに紫外線,外傷,放射線,ヒ素の摂取などが誘因となることもあるが,有棘細胞癌に比べると,その頻度は少ない。
[その他の皮膚癌]
 日光角化症actinic keratosisは,顔面,手背などの慢性日光皮膚炎に発生する表皮内癌で,白人に多いが,日本人ではまれに高齢者にみられる。淡紅色で鱗屑(りんせつ)(ふけのような皮膚のかす)をつけ,辺縁の皮膚は萎縮して毛細血管の拡張をみることが多い。…

※「actinic keratosis」について言及している用語解説の一部を掲載しています。

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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