{"id":8877,"date":"2024-12-07T15:54:04","date_gmt":"2024-12-07T13:54:04","guid":{"rendered":"https:\/\/medilab.km.ua\/?p=8877"},"modified":"2026-04-30T08:25:54","modified_gmt":"2026-04-30T05:25:54","slug":"onkomarker-rea-korotkyj-poyasnyuvalnyj-gid","status":"publish","type":"post","link":"https:\/\/medilab.km.ua\/en\/onkomarker-rea-korotkyj-poyasnyuvalnyj-gid\/","title":{"rendered":"CEA tumor marker: a brief explanatory guide"},"content":{"rendered":"<h3 class=\"\" data-start=\"246\" data-end=\"272\"><strong>What is the CEA tumor marker?<\/strong><\/h3>\n<p class=\"\" data-start=\"274\" data-end=\"607\">The tumor marker CEA (carcinoembryonic antigen or CEA) is a specific protein that is normally produced in the fetus during development. In adults, its level in the blood is very low or absent. An increase in CEA in an adult may indicate <strong data-start=\"560\" data-end=\"606\">oncological processes or chronic inflammation<\/strong>.<\/p>\n<p class=\"\" data-start=\"609\" data-end=\"772\">The CEA tumor marker is not a \u00abcancer indicator\u00bb in the narrow sense \u2014 it can be elevated in various diseases, not only malignant ones, but it is often used for:<\/p>\n<ul data-start=\"774\" data-end=\"977\">\n<li class=\"\" data-start=\"774\" data-end=\"821\">\n<p class=\"\" data-start=\"776\" data-end=\"821\">monitoring <strong data-start=\"788\" data-end=\"819\">effectiveness of cancer treatment<\/strong><\/p>\n<\/li>\n<li class=\"\" data-start=\"822\" data-end=\"902\">\n<p class=\"\" data-start=\"824\" data-end=\"902\"><strong data-start=\"824\" data-end=\"847\">detection of relapses<\/strong> after surgical or chemotherapy treatment<\/p>\n<\/li>\n<li class=\"\" data-start=\"903\" data-end=\"977\">\n<p class=\"\" data-start=\"905\" data-end=\"977\"><strong data-start=\"905\" data-end=\"936\">tumor progression assessments<\/strong> in the intestines, lungs, mammary gland<\/p>\n<\/li>\n<\/ul>\n<h3 class=\"\" data-start=\"979\" data-end=\"1013\"><strong>When is a CEA test prescribed?<\/strong><\/h3>\n<ul data-start=\"1015\" data-end=\"1265\">\n<li class=\"\" data-start=\"1015\" data-end=\"1061\">\n<p class=\"\" data-start=\"1017\" data-end=\"1061\">If rectal or colon cancer is suspected<\/p>\n<\/li>\n<li class=\"\" data-start=\"1062\" data-end=\"1138\">\n<p class=\"\" data-start=\"1064\" data-end=\"1138\">In patients with lung, stomach, breast, pancreatic cancer<\/p>\n<\/li>\n<li class=\"\" data-start=\"1139\" data-end=\"1205\">\n<p class=\"\" data-start=\"1141\" data-end=\"1205\">After surgery to remove the tumor - to monitor for recurrence<\/p>\n<\/li>\n<li class=\"\" data-start=\"1206\" data-end=\"1265\">\n<p class=\"\" data-start=\"1208\" data-end=\"1265\">Together with other markers - for a comprehensive assessment of the condition<\/p>\n<\/li>\n<\/ul>\n<h3 class=\"\" data-start=\"1267\" data-end=\"1289\"><strong>Norm and deviation<\/strong><\/h3>\n<p class=\"\" data-start=\"1291\" data-end=\"1336\">In healthy people, the level of CEA in the blood is usually:<\/p>\n<ul data-start=\"1338\" data-end=\"1427\">\n<li class=\"\" data-start=\"1338\" data-end=\"1366\">\n<p class=\"\" data-start=\"1340\" data-end=\"1366\"><strong data-start=\"1340\" data-end=\"1353\">0\u20133 ng\/mL<\/strong> in non-smokers<\/p>\n<\/li>\n<li class=\"\" data-start=\"1367\" data-end=\"1427\">\n<p class=\"\" data-start=\"1369\" data-end=\"1427\"><strong data-start=\"1369\" data-end=\"1382\">0\u20135 ng\/mL<\/strong> in smokers (smoking increases the level of the marker)<\/p>\n<\/li>\n<\/ul>\n<p class=\"\" data-start=\"1429\" data-end=\"1476\">An increase in the level above normal may indicate:<\/p>\n<ul data-start=\"1478\" data-end=\"1708\">\n<li class=\"\" data-start=\"1478\" data-end=\"1594\">\n<p class=\"\" data-start=\"1480\" data-end=\"1594\"><strong data-start=\"1480\" data-end=\"1503\">Oncological diseases<\/strong>:<br data-start=\"1504\" data-end=\"1507\" \/>\u2013 cancer of the colon, stomach, pancreas<br data-start=\"1557\" data-end=\"1560\" \/>\u2013 lung, ovarian, breast cancer<\/p>\n<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-8878\" src=\"https:\/\/medilab.km.ua\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/medilab.km.ua\/wp-content\/uploads\/2025\/04\/female-patients-talking-hospital-1.jpg\" alt=\"Infographic with CEA norms for smokers and non-smokers\" width=\"1200\" height=\"800\" srcset=\"\" data-srcset=\"https:\/\/medilab.km.ua\/wp-content\/uploads\/2025\/04\/female-patients-talking-hospital-1.jpg 1200w, https:\/\/medilab.km.ua\/wp-content\/uploads\/2025\/04\/female-patients-talking-hospital-1-150x100.jpg 150w, https:\/\/medilab.km.ua\/wp-content\/uploads\/2025\/04\/female-patients-talking-hospital-1-600x400.jpg 600w, https:\/\/medilab.km.ua\/wp-content\/uploads\/2025\/04\/female-patients-talking-hospital-1-300x200.jpg 300w, https:\/\/medilab.km.ua\/wp-content\/uploads\/2025\/04\/female-patients-talking-hospital-1-1024x683.jpg 1024w, https:\/\/medilab.km.ua\/wp-content\/uploads\/2025\/04\/female-patients-talking-hospital-1-768x512.jpg 768w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<ul data-start=\"1478\" data-end=\"1708\">\n<li class=\"\" data-start=\"1595\" data-end=\"1708\">\n<p class=\"\" data-start=\"1597\" data-end=\"1708\"><strong data-start=\"1597\" data-end=\"1620\">Non-oncological conditions<\/strong>:<br data-start=\"1621\" data-end=\"1624\" \/>\u2013 cirrhosis of the liver<br data-start=\"1641\" data-end=\"1644\" \/>\u2013 chronic bronchitis<br data-start=\"1665\" data-end=\"1668\" \/>\u2013 pancreatitis<br data-start=\"1682\" data-end=\"1685\" \/>\u2013 peptic ulcer<\/p>\n<\/li>\n<\/ul>\n<h3 class=\"\" data-start=\"1710\" data-end=\"1757\"><strong>Table: REA levels and possible interpretations<\/strong><\/h3>\n<div class=\"overflow-x-auto contain-inline-size\">\n<table data-start=\"1759\" data-end=\"2267\">\n<thead data-start=\"1759\" data-end=\"1828\">\n<tr data-start=\"1759\" data-end=\"1828\">\n<th data-start=\"1759\" data-end=\"1782\">CEA level (ng\/ml)<\/th>\n<th data-start=\"1782\" data-end=\"1828\">Possible interpretation<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"1899\" data-end=\"2267\">\n<tr data-start=\"1899\" data-end=\"1968\">\n<td>0\u20133<\/td>\n<td>Non-smoking rate<\/td>\n<\/tr>\n<tr data-start=\"1969\" data-end=\"2038\">\n<td>3\u20135<\/td>\n<td>Norm for smokers, borderline level<\/td>\n<\/tr>\n<tr data-start=\"2039\" data-end=\"2114\">\n<td>5\u201310<\/td>\n<td>Possible chronic inflammation or benign changes<\/td>\n<\/tr>\n<tr data-start=\"2115\" data-end=\"2191\">\n<td>&gt;10<\/td>\n<td>Suspicion of a tumor process, diagnosis required<\/td>\n<\/tr>\n<tr data-start=\"2192\" data-end=\"2267\">\n<td>&gt;20\u201330<\/td>\n<td>Often indicates widespread cancer or metastases<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3 class=\"\" data-start=\"2269\" data-end=\"2287\"><strong>Important nuances<\/strong><\/h3>\n<ul data-start=\"2289\" data-end=\"2645\">\n<li class=\"\" data-start=\"2289\" data-end=\"2359\">\n<p class=\"\" data-start=\"2291\" data-end=\"2359\">Only one REA <strong data-start=\"2307\" data-end=\"2356\">not used for diagnosis<\/strong>.<\/p>\n<\/li>\n<li class=\"\" data-start=\"2360\" data-end=\"2478\">\n<p class=\"\" data-start=\"2362\" data-end=\"2478\">Increasing REA levels <strong data-start=\"2383\" data-end=\"2408\">does not always mean cancer<\/strong> \u2014 additional examination methods are required (CT scan, colonoscopy, biopsy).<\/p>\n<\/li>\n<li class=\"\" data-start=\"2479\" data-end=\"2568\">\n<p class=\"\" data-start=\"2481\" data-end=\"2568\">The marker level can be <strong data-start=\"2506\" data-end=\"2534\">reduced after treatment<\/strong> \u2014 this is a good prognostic sign.<\/p>\n<\/li>\n<li class=\"\" data-start=\"2569\" data-end=\"2645\">\n<p class=\"\" data-start=\"2571\" data-end=\"2645\">Gradual increase in CEA after surgery <strong data-start=\"2610\" data-end=\"2644\">may signal a relapse<\/strong>.<\/p>\n<\/li>\n<\/ul>\n<h3 class=\"\" data-start=\"2647\" data-end=\"2671\"><strong>References to sources<\/strong><\/h3>\n<ol data-start=\"2673\" data-end=\"2878\">\n<li class=\"\" data-start=\"2673\" data-end=\"2774\">\n<p class=\"\" data-start=\"2676\" data-end=\"2774\">Mayo Clinic. <a class=\"\" href=\"https:\/\/www.mayoclinic.org\/tests-procedures\/cea-test\/about\/pac-20385128\" target=\"_new\" rel=\"noopener\" data-start=\"2689\" data-end=\"2772\">CEA test<\/a><\/p>\n<\/li>\n<li class=\"\" data-start=\"2775\" data-end=\"2841\">\n<p class=\"\" data-start=\"2778\" data-end=\"2841\">National Cancer Institute (USA). Biomarker testing guidelines<\/p>\n<\/li>\n<li class=\"\" data-start=\"2842\" data-end=\"2878\">\n<p class=\"\" data-start=\"2845\" data-end=\"2878\">WHO - Global Cancer Observatory<\/p>\n<\/li>\n<\/ol>\n<p>The CEA test is a monitoring tool, not a verdict. It helps doctors monitor the dynamics of the disease and the results of treatment, but it does not replace a full diagnosis.<\/p>","protected":false},"excerpt":{"rendered":"<p>What is the CEA tumor marker? The CEA tumor marker (carcinoembryonic antigen or CEA) is a specific protein that is normally produced by<\/p>","protected":false},"author":97,"featured_media":8879,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-8877","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/posts\/8877","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/users\/97"}],"replies":[{"embeddable":true,"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/comments?post=8877"}],"version-history":[{"count":0,"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/posts\/8877\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/media\/8879"}],"wp:attachment":[{"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/media?parent=8877"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/categories?post=8877"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/tags?post=8877"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}