{"id":313,"date":"2010-04-29T04:00:00","date_gmt":"2010-04-29T04:00:00","guid":{"rendered":"https:\/\/www.lymphoma.ca\/?page_id=313"},"modified":"2010-04-29T04:00:00","modified_gmt":"2010-04-29T04:00:00","slug":"notions-de-base-sur-le-cancer","status":"publish","type":"page","link":"https:\/\/www.lymphoma.ca\/fr\/le-lymphome\/lymphome-101\/notions-de-base-sur-le-cancer\/","title":{"rendered":"Notions de base sur le cancer"},"content":{"rendered":"<div>\n<h2>Qu\u2019est-ce que le cancer?<\/h2>\n<p>Chaque partie du corps humain est compos\u00e9e de cellules&nbsp;: la peau, les cheveux, les ongles, les ganglions lymphatiques, le sang et les organes du corps. La division cellulaire fait naturellement partie du cycle de vie d\u2019une cellule et elle est r\u00e9gul\u00e9e par les g\u00e8nes (ce sont les segments d\u2019ADN qui d\u00e9terminent la constitution unique d\u2019une personne et la mani\u00e8re dont fonctionne son corps). Lorsque la personne est en bonne sant\u00e9, le processus de division cellulaire est contr\u00f4l\u00e9 de mani\u00e8re automatique par tout un ensemble de r\u00e9gulateurs dans le corps. Les cellules canc\u00e9reuses sont les descendantes d\u2019une seule cellule normale dans laquelle des erreurs g\u00e9n\u00e9tiques ou des mutations se sont produites. Ces erreurs peuvent survenir au hasard et de mani\u00e8re spontan\u00e9e au moment de la division cellulaire ou elles peuvent \u00eatre le r\u00e9sultat d\u2019une exposition \u00e0 des toxines environnementales (agents canc\u00e9rig\u00e8nes). Le cancer appara\u00eet lorsque ces cellules anormales continuent de se d\u00e9velopper \u00e0 un rythme incontr\u00f4l\u00e9. Alors que ces cellules anormales se divisent, elles peuvent finir par former une masse solide qu\u2019on appelle une tumeur. Une tumeur maligne (canc\u00e9reuse) va continuer sa croissance \u00e0 un rythme incontr\u00f4l\u00e9 et peut finir par toucher d\u2019autres zones du corps. La d\u00e9finition du cancer est la croissance anormale et incontr\u00f4l\u00e9e des cellules. La plupart du temps, votre corps r\u00e9agit et corrige le probl\u00e8me sans que vous vous en aperceviez. Les cellules d\u00e9tectent et corrigent les erreurs ou d\u2019autres g\u00e8nes deviennent actifs et entra\u00eenent la mort des cellules ayant subi une mutation. Le syst\u00e8me immunitaire reconna\u00eet \u00e9galement les cellules endommag\u00e9es et les tuent avant que des tumeurs ne se forment et posent probl\u00e8me. Comme plusieurs facteurs entrent en ligne de compte, les cancers ne sont pas consid\u00e9r\u00e9s comme \u00e9tant le r\u00e9sultat d\u2019un seul \u00e9v\u00e9nement. Pour qu\u2019un cancer se forme, une combinaison d\u2019\u00e9v\u00e9nements d\u00e9favorables et d\u2019opportunit\u00e9s rat\u00e9es est n\u00e9cessaire.<\/p>\n<div id=\"why\">\n<h2>Pourquoi le cancer appara\u00eet-il?<\/h2>\n<p>C\u2019est une question \u00e0 laquelle les scientifiques tentent de r\u00e9pondre depuis tr\u00e8s longtemps. L\u2019une des raisons donn\u00e9es au d\u00e9veloppement du cancer est le r\u00e9sultat d\u2019erreurs g\u00e9n\u00e9tiques. Il existe beaucoup de g\u00e8nes diff\u00e9rents dans toutes les cellules et chacun d\u2019eux est en charge d\u2019une fonction diff\u00e9rente dans le corps. Lorsque des erreurs (qu\u2019on appelle mutations g\u00e9n\u00e9tiques) se produisent dans les g\u00e8nes qui contr\u00f4lent la division cellulaire, la cellule ne peut pas se diviser correctement. Le r\u00e9sultat \u00e9tant une cellule anormale qui ne peut pas effectuer correctement la fonction qui lui \u00e9tait destin\u00e9e. Les cellules du syst\u00e8me immunitaire circulent constamment dans le corps afin d\u2019identifier ces cellules anormales et de les d\u00e9truire. Toutefois, dans les cas o\u00f9 le syst\u00e8me immunitaire ne fonctionne pas correctement ou lorsque la mutation g\u00e9n\u00e9tique est trop importante, les cellules anormales survivent et se d\u00e9veloppent. Le cancer appara\u00eet lorsque ces cellules anormales continuent de se d\u00e9velopper \u00e0 un rythme incontr\u00f4l\u00e9. Alors que ces cellules anormales se divisent, elles peuvent finir par former une masse solide qu\u2019on appelle une tumeur. Une tumeur maligne (canc\u00e9reuse) va continuer sa croissance \u00e0 un rythme incontr\u00f4l\u00e9 et finira par toucher d\u2019autres zones du corps.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Qu\u2019est-ce que le cancer? Chaque partie du corps humain est compos\u00e9e de cellules&nbsp;: la peau, les cheveux, les ongles, les ganglions lymphatiques, le sang et les organes du corps. La&#8230;<\/p>\n","protected":false},"author":6,"featured_media":10974,"parent":485,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"page-sidebar.php","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-313","page","type-page","status-publish","has-post-thumbnail"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Notions de base sur le cancer - Lymphoma Canada<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.lymphoma.ca\/fr\/le-lymphome\/lymphome-101\/notions-de-base-sur-le-cancer\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Notions de base sur le cancer - Lymphoma Canada\" \/>\n<meta property=\"og:description\" content=\"Qu\u2019est-ce que le cancer? 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