{"id":24322,"date":"2026-02-28T22:53:50","date_gmt":"2026-03-01T02:53:50","guid":{"rendered":"https:\/\/cliniqueomicron.ca\/anisocytose\/"},"modified":"2026-09-17T22:19:58","modified_gmt":"2026-09-18T02:19:58","slug":"anisocytose","status":"publish","type":"page","link":"https:\/\/cliniqueomicron.ca\/en\/anisocytose\/","title":{"rendered":"Anisocytose : causes, sympt\u00f4mes et traitement | Clinique Omicron"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"24322\" class=\"elementor elementor-24322\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b32a938 e-flex e-con-boxed e-con e-parent\" data-id=\"b32a938\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9d9f241 elementor-widget elementor-widget-html\" data-id=\"9d9f241\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<style>\n@import url('https:\/\/fonts.googleapis.com\/css2?family=Cinzel:wght@600&family=Poppins:wght@400;500;600;700&display=swap');\n\n.co-wrap * {\n  font-family: 'Poppins', sans-serif;\n  box-sizing: border-box;\n}\n.co-wrap {\n  max-width: 1100px;\n  margin: 0 auto;\n  padding: 30px 0 60px;\n  margin-top: 10px;\n}\n.co-label {\n  font-family: 'Cinzel', serif;\n  font-size: 14px;\n  font-weight: bold;\n  letter-spacing: 1px;\n  text-transform: uppercase;\n  color: #4D6577;\n  margin-bottom: 14px;\n  display: block;\n}\n.co-wrap h1 {\n  font-size: 32px;\n  font-weight: 500;\n  color: #323C52;\n  margin: 0 0 22px;\n  line-height: 1.2;\n  letter-spacing: 0.5px;\n}\n.co-intro {\n  font-size: 16px;\n  font-weight: 400;\n  line-height: 1.75;\n  color: #4D6577;\n  margin-bottom: 36px;\n  padding-bottom: 32px;\n  border-bottom: 1px solid rgba(77,101,119,.2);\n}\n.co-wrap h2 {\n  font-size: 20px;\n  font-weight: 600;\n  color: #323C52;\n  margin: 32px 0 12px;\n  letter-spacing: 0.3px;\n}\n.co-wrap p {\n  font-size: 15px;\n  font-weight: 400;\n  color: #4D6577;\n  line-height: 1.7;\n  margin-bottom: 14px;\n}\n.co-list {\n  list-style: none;\n  padding: 0;\n  margin: 12px 0 24px;\n}\n.co-list li {\n  font-size: 15px;\n  font-weight: 400;\n  color: #4D6577;\n  padding: 10px 14px 10px 38px;\n  margin-bottom: 8px;\n  border-radius: 6px;\n  position: relative;\n  background: rgba(77,101,119,.06);\n  border-left: 3px solid #4D6577;\n}\n.co-list li::before {\n  content: \"\u2713\";\n  position: absolute;\n  left: 12px;\n  font-weight: 700;\n  color: #4D6577;\n}\n.co-table {\n  width: 100%;\n  border-collapse: collapse;\n  margin: 14px 0 22px;\n  font-size: 14px;\n  border-radius: 8px;\n  overflow: hidden;\n}\n.co-table thead tr {\n  background: #323C52;\n  color: #fff;\n}\n.co-table thead th {\n  padding: 11px 16px;\n  text-align: left;\n  font-weight: 600;\n  font-size: 13px;\n}\n.co-table tbody tr:nth-child(even) { background: rgba(77,101,119,.06); 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}\n.co-urgence .co-urgence-num {\n  font-size: 28px;\n  font-weight: 700;\n  color: #c0392b;\n  letter-spacing: 2px;\n  display: block;\n}\n<\/style>\n\n<div class=\"co-wrap\">\n\n  <span class=\"co-label\">H\u00e9matologie \u2013 Analyse sanguine<\/span>\n  <h1>Anisocytosis<\/h1>\n<style>.oc-fiche-cta{margin:8px 0 34px;padding:22px 24px;border:1.5px solid rgba(50,60,82,.15);border-left:4px solid #FF611C;border-radius:12px;background:#F4F6F8;font-family:Poppins,sans-serif}.oc-fiche-cta-t{font-size:18px;font-weight:600;color:#323C52;margin:0 0 4px;line-height:1.35}.oc-fiche-cta-x{font-size:15px;color:#4D6577;margin:0 0 14px;line-height:1.55}.oc-fiche-cta-b{display:flex;flex-wrap:wrap;gap:10px}.oc-fiche-cta-b a{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 18px;border-radius:8px;font-size:14px;font-weight:600;text-decoration:none;box-sizing:border-box}.oc-fiche-cta-b .oc-p{background:#FF611C;color:#fff}.oc-fiche-cta-b .oc-p:hover{background:#E04E0C}.oc-fiche-cta-b .oc-s{background:#fff;color:#323C52;border:1.5px solid rgba(50,60,82,.25)}@media (max-width:600px){.co-wrap h1{font-size:24px;line-height:1.25;text-transform:none}.oc-fiche-cta{padding:18px 16px}.oc-fiche-cta-b a{flex:1 1 100%}body .co-wrap > .co-table,body .co-wrap > .co-table tbody,body .co-wrap > .co-table tr,body .co-wrap > .co-table td{display:block;width:100%;box-sizing:border-box}body .co-wrap > .co-table{min-width:0;table-layout:auto}body .co-wrap > .co-table thead{display:none}body .co-wrap > .co-table tr{margin:0 0 10px;border:1px solid rgba(77,101,119,.18);border-radius:8px;overflow:hidden}body .co-wrap > .co-table td{padding:9px 12px;border:0}body .co-wrap > .co-table td:first-child{font-weight:600;color:#323C52;background:rgba(77,101,119,.07)}#ocw{transform:scale(.8);transform-origin:bottom right}}<\/style><div class=\"oc-fiche-cta\" data-oc-cta=\"fiche-haut-lab\"><p class=\"oc-fiche-cta-t\">Faire cette analyse<\/p><p class=\"oc-fiche-cta-x\">Pr\u00e9l\u00e8vements sanguins dans nos points de service au Qu\u00e9bec. Un professionnel peut aussi interpr\u00e9ter vos r\u00e9sultats avec vous.<\/p><div class=\"oc-fiche-cta-b\"><a class=\"oc-p\" href=\"https:\/\/cliniqueomicron.ca\/prelevements-medicaux\/\">Blood sampling<\/a><a class=\"oc-s\" href=\"https:\/\/cliniqueomicron.ca\/rendez-vous\/\">Make an appointment<\/a><a class=\"oc-s\" href=\"tel:+15146063350\">514 606-3350<\/a><\/div><\/div>\n\n\n  <div class=\"co-intro\">\n    L'anisocytose est une anomalie h\u00e9matologique caract\u00e9ris\u00e9e par une variation anormale de la taille des globules rouges (\u00e9rythrocytes) au sein d'un m\u00eame \u00e9chantillon sanguin. En conditions normales, les \u00e9rythrocytes pr\u00e9sentent une taille relativement uniforme, entre 6 et 8 microm\u00e8tres de diam\u00e8tre. Lorsque cette homog\u00e9n\u00e9it\u00e9 est perturb\u00e9e, on parle d'anisocytose. Ce constat est objectiv\u00e9 par l'indice de distribution des globules rouges (IDR ou RDW), mesur\u00e9 lors d'une formule sanguine compl\u00e8te (FSC). Une valeur d'IDR sup\u00e9rieure \u00e0 14,5 % est g\u00e9n\u00e9ralement consid\u00e9r\u00e9e comme anormale. L'anisocytose n'est pas une maladie en soi, mais le reflet d'un trouble sous-jacent touchant la production, la maturation ou la destruction des \u00e9rythrocytes. Elle peut accompagner diverses formes d'an\u00e9mie, des carences nutritionnelles, des maladies chroniques ou des affections h\u00e9matologiques plus complexes. Sa d\u00e9tection pr\u00e9coce permet d'orienter le bilan diagnostique vers la cause responsable et d'instaurer un traitement adapt\u00e9.\n  <\/div>\n\n  <h2>Mesure et interpr\u00e9tation de l'IDR<\/h2>\n  <p>L'indice de distribution des globules rouges (IDR), aussi appel\u00e9 RDW pour <em>Red cell Distribution Width<\/em>, est le param\u00e8tre de r\u00e9f\u00e9rence pour quantifier l'anisocytose. Il exprime en pourcentage la dispersion des volumes \u00e9rythrocytaires autour de la moyenne. Plus l'IDR est \u00e9lev\u00e9, plus la variation de taille est importante.<\/p>\n\n  <div class=\"co-infobox\">\n    <span class=\"ico\">\u2139\ufe0f<\/span>\n    <span>L'IDR est syst\u00e9matiquement inclus dans la formule sanguine compl\u00e8te (FSC). Un r\u00e9sultat isol\u00e9 ne suffit pas au diagnostic : il doit toujours \u00eatre interpr\u00e9t\u00e9 en combinaison avec l'h\u00e9moglobine, le volume globulaire moyen (VGM) et le contexte clinique du patient.<\/span>\n  <\/div>\n\n  <table class=\"co-table\">\n    <thead>\n      <tr>\n        <th>IDR (RDW)<\/th>\n        <th>Interpretation<\/th>\n        <th>Orientations possibles<\/th>\n      <\/tr>\n    <\/thead>\n    <tbody>\n      <tr>\n        <td>11,5 \u2013 14,5 %<\/td>\n        <td>Normal<\/td>\n        <td>\u00c9rythrocytes de taille homog\u00e8ne<\/td>\n      <\/tr>\n      <tr>\n        <td>14,6 \u2013 18 %<\/td>\n        <td>Anisocytose mod\u00e9r\u00e9e<\/td>\n        <td>Carence en fer, d\u00e9but d'an\u00e9mie, maladie chronique<\/td>\n      <\/tr>\n      <tr>\n        <td>> 18 %<\/td>\n        <td>Anisocytose marqu\u00e9e<\/td>\n        <td>Carence mixte, an\u00e9mie h\u00e9molytique, my\u00e9lodysplasie<\/td>\n      <\/tr>\n    <\/tbody>\n  <\/table>\n\n  <h2>Common causes<\/h2>\n  <p>L'anisocytose peut r\u00e9sulter de nombreuses conditions affectant la production ou la survie des globules rouges. Les causes les plus courantes sont les carences nutritionnelles et les an\u00e9mies, mais des maladies syst\u00e9miques ou h\u00e9matologiques peuvent \u00e9galement \u00eatre en cause.<\/p>\n\n  <table class=\"co-table\">\n    <thead>\n      <tr>\n        <th>Category<\/th>\n        <th>Examples<\/th>\n        <th>Mechanism<\/th>\n      <\/tr>\n    <\/thead>\n    <tbody>\n      <tr>\n        <td>Carence en fer<\/td>\n        <td>An\u00e9mie ferriprive<\/td>\n        <td>Production de microcytes (petits GR) en plus des GR normaux<\/td>\n      <\/tr>\n      <tr>\n        <td>Carence en vitamine B12 ou folates<\/td>\n        <td>An\u00e9mie m\u00e9galoblastique<\/td>\n        <td>Production de macrocytes (grands GR) en coexistence avec GR normaux<\/td>\n      <\/tr>\n      <tr>\n        <td>Carence mixte<\/td>\n        <td>Fer + B12 simultan\u00e9ment<\/td>\n        <td>M\u00e9lange de micro et macrocytes, IDR tr\u00e8s \u00e9lev\u00e9<\/td>\n      <\/tr>\n      <tr>\n        <td>Hemolytic anemia<\/td>\n        <td>Sph\u00e9rocytose, dr\u00e9panocytose<\/td>\n        <td>Destruction acc\u00e9l\u00e9r\u00e9e, lib\u00e9ration de r\u00e9ticulocytes de grande taille<\/td>\n      <\/tr>\n      <tr>\n        <td>Chronic illness<\/td>\n        <td>Insuffisance r\u00e9nale, maladies inflammatoires<\/td>\n        <td>Perturbation de l'\u00e9rythropo\u00ef\u00e8se<\/td>\n      <\/tr>\n      <tr>\n        <td>Syndromes my\u00e9lodysplasiques<\/td>\n        <td>Dysplasie m\u00e9dullaire<\/td>\n        <td>Production anarchique d'\u00e9rythrocytes morphologiquement anormaux<\/td>\n      <\/tr>\n      <tr>\n        <td>Recent blood transfusion<\/td>\n        <td>M\u00e9lange de populations \u00e9rythrocytaires<\/td>\n        <td>Coexistence de GR du donneur et du receveur<\/td>\n      <\/tr>\n    <\/tbody>\n  <\/table>\n\n  <h2>Manifestations cliniques associ\u00e9es<\/h2>\n  <p>L'anisocytose elle-m\u00eame ne produit pas de sympt\u00f4mes sp\u00e9cifiques. Ce sont les conditions sous-jacentes qui en sont \u00e0 l'origine qui engendrent un tableau clinique. Les signes les plus fr\u00e9quemment rapport\u00e9s sont li\u00e9s \u00e0 l'an\u00e9mie ou \u00e0 la pathologie causale.<\/p>\n\n  <ul class=\"co-list\">\n    <li>Fatigue persistante et diminution de l'endurance physique<\/li>\n    <li>P\u00e2leur cutan\u00e9e ou des muqueuses (conjonctives, gencives)<\/li>\n    <li>Essoufflement \u00e0 l'effort ou au repos dans les cas s\u00e9v\u00e8res<\/li>\n    <li>Palpitations ou acc\u00e9l\u00e9ration du rythme cardiaque<\/li>\n    <li>\u00c9tourdissements, c\u00e9phal\u00e9es ou difficult\u00e9s de concentration<\/li>\n    <li>Ongles cassants, chute de cheveux (en contexte de carence en fer)<\/li>\n    <li>Paresth\u00e9sies des membres (en contexte de carence en B12)<\/li>\n  <\/ul>\n\n  <div class=\"co-infobox\">\n    <span class=\"ico\">\u2139\ufe0f<\/span>\n    <span>Il est possible de pr\u00e9senter une anisocytose significative sans sympt\u00f4mes apparents. La d\u00e9couverte est alors fortuite, lors d'un bilan sanguin de routine ou pr\u00e9op\u00e9ratoire. Une investigation reste indiqu\u00e9e m\u00eame en l'absence de plaintes cliniques.<\/span>\n  <\/div>\n\n  <h2>Diagnostic approach<\/h2>\n  <p>Devant un IDR \u00e9lev\u00e9, le m\u00e9decin oriente le bilan compl\u00e9mentaire en fonction du volume globulaire moyen (VGM), afin de distinguer une anisocytose microcytaire, normocytaire ou macrocytaire. Cette combinaison de param\u00e8tres oriente vers les causes probables et guide les analyses cibl\u00e9es.<\/p>\n\n  <ul class=\"co-list\">\n    <li>Formule sanguine compl\u00e8te avec diff\u00e9rentiel (FSC) et r\u00e9vision du frottis sanguin<\/li>\n    <li>Ferritine s\u00e9rique, fer s\u00e9rique et capacit\u00e9 totale de fixation (TIBC)<\/li>\n    <li>Dosage de la vitamine B12 et de l'acide folique<\/li>\n    <li>R\u00e9ticulocytes pour \u00e9valuer la r\u00e9ponse m\u00e9dullaire<\/li>\n    <li>Bilan r\u00e9nal (cr\u00e9atinine, DFG) et bilan thyro\u00efdien si indiqu\u00e9<\/li>\n    <li>LDH, bilirubine et haptoglobine en cas de suspicion d'h\u00e9molyse<\/li>\n    <li>\u00c9lectrophor\u00e8se de l'h\u00e9moglobine si h\u00e9moglobinopathie envisag\u00e9e<\/li>\n  <\/ul>\n\n  <h2>Support and treatments<\/h2>\n  <p>Le traitement de l'anisocytose repose enti\u00e8rement sur la correction de la cause identifi\u00e9e. Il n'existe pas de traitement visant l'anomalie morphologique en elle-m\u00eame : celle-ci se r\u00e9sout lorsque la pathologie responsable est trait\u00e9e efficacement.<\/p>\n\n  <table class=\"co-table\">\n    <thead>\n      <tr>\n        <th>Cause identifi\u00e9e<\/th>\n        <th>Traitement principal<\/th>\n        <th>D\u00e9lai de normalisation attendu<\/th>\n      <\/tr>\n    <\/thead>\n    <tbody>\n      <tr>\n        <td>Carence en fer<\/td>\n        <td>Suppl\u00e9mentation orale ou IV en fer<\/td>\n        <td>3 \u00e0 6 mois<\/td>\n      <\/tr>\n      <tr>\n        <td>Carence en B12<\/td>\n        <td>Injections IM de cyanocobalamine ou suppl\u00e9mentation orale haute dose<\/td>\n        <td>4 to 8 weeks<\/td>\n      <\/tr>\n      <tr>\n        <td>Carence en folates<\/td>\n        <td>Acide folique oral<\/td>\n        <td>4 \u00e0 6 semaines<\/td>\n      <\/tr>\n      <tr>\n        <td>Chronic illness<\/td>\n        <td>Traitement de la pathologie de fond, \u00e9rythropo\u00ef\u00e9tine si indiqu\u00e9<\/td>\n        <td>Variable<\/td>\n      <\/tr>\n      <tr>\n        <td>Hemolytic anemia<\/td>\n        <td>Selon m\u00e9canisme : corticoth\u00e9rapie, spl\u00e9nectomie, transfusions<\/td>\n        <td>Variable<\/td>\n      <\/tr>\n      <tr>\n        <td>Syndrome my\u00e9lodysplasique<\/td>\n        <td>Prise en charge h\u00e9matologique sp\u00e9cialis\u00e9e<\/td>\n        <td>Suivi \u00e0 long terme<\/td>\n      <\/tr>\n    <\/tbody>\n  <\/table>\n\n  <h2>Consult at Clinique Omicron<\/h2>\n  <p>Clinique Omicron offre des consultations m\u00e9dicales compl\u00e8tes pour l'\u00e9valuation des anomalies sanguines, incluant l'anisocytose. Gr\u00e2ce \u00e0 ses points de service au Qu\u00e9bec, les patients peuvent b\u00e9n\u00e9ficier d'une prescription de bilan sanguin cibl\u00e9, d'une interpr\u00e9tation clinique des r\u00e9sultats et d'un suivi adapt\u00e9 \u00e0 leur condition. Les m\u00e9decins et infirmi\u00e8res praticiennes sp\u00e9cialis\u00e9es (IPS) de la clinique assurent une prise en charge rigoureuse, que l'anomalie soit d\u00e9couverte fortuitement ou dans un contexte de sympt\u00f4mes \u00e9vocateurs. Pour prendre rendez-vous dans l'un des points de service au Qu\u00e9bec, visitez cliniqueomicron.ca ou contactez directement la clinique.<\/p>\n\n  <style>.co-disclaimer{font-size:13px;color:#8a9aaa;font-style:italic;border-top:1px solid rgba(77,101,119,.15);padding-top:24px;margin-top:40px;line-height:1.6;}<\/style>\n  <p class=\"co-disclaimer\">The content of this page is provided for informational purposes only and is not intended to replace the advice of a qualified healthcare professional. Consult a physician for any symptoms, questions or decisions you may have regarding your health.<\/p>\n\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>H\u00e9matologie \u2013 Analyse sanguine Anisocytose L&#8217;anisocytose est une anomalie h\u00e9matologique caract\u00e9ris\u00e9e par une variation anormale de la taille des globules rouges (\u00e9rythrocytes) au sein d&#8217;un m\u00eame \u00e9chantillon sanguin. En conditions normales, les \u00e9rythrocytes pr\u00e9sentent une taille relativement uniforme, entre 6 et 8 microm\u00e8tres de diam\u00e8tre. Lorsque cette homog\u00e9n\u00e9it\u00e9 est perturb\u00e9e, on parle d&#8217;anisocytose. Ce constat&hellip;&nbsp;<a href=\"https:\/\/cliniqueomicron.ca\/en\/anisocytose\/\" rel=\"bookmark\">Read More \"<span class=\"screen-reader-text\">Anisocytose : causes, sympt\u00f4mes et traitement | Clinique Omicron<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"off","neve_meta_content_width":100,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","_themeisle_gutenberg_block_has_review":false,"_metasync_otto_title":"Anisocytose : Causes, Sympt\u00f4mes et Traitement | Clinique Omicron","_metasync_otto_description":"L'anisocytose d\u00e9signe une variation anormale de la taille des globules rouges. 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