...It is difficult to give a complete definition of cancer, but for now we can say the following: "Cancer is a disease in which abnormal cells that arise in the body of a multicellular organism grow indefinitely, ignoring the harmony of the organism, and invade neighboring tissues or metastasize to other organs, causing organ failure and various pathological conditions, and in many cases leading to the death of the organism." Cancer is a disease of multicellular organisms, and single-celled organisms such as bacteria and amoebas do not have cancer. In multicellular organisms, a single reproductive cell divides and grows, differentiates into various organs, and functions as a harmonious individual as a whole. ... *Some of the terminology that mentions "Todaro, G." is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…癌を完全に定義づけることは難しいが,ひとまず次のようにいうことができる。すなわち,〈癌とは,多細胞生物の体の中に生じた異常な細胞が,生体の調和を無視して無制限に増殖し,他方,近隣の組織に浸潤したり他臓器に転移し,臓器不全やさまざまな病的状態をひき起こし,多くの場合生体が死に至る病気〉である。 癌は多細胞生物の病気であって,細菌やアメーバなど単細胞生物には癌はない。多細胞生物では,1個の生殖細胞が分裂増殖し,さまざまな器官に分化し,全体として調和のとれた個体として活動している。… ※「Todaro,G.」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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