{"id":63253,"date":"2026-07-20T10:10:02","date_gmt":"2026-07-20T10:10:02","guid":{"rendered":"https:\/\/iarc.spherical.horse\/news-events\/international-classification-of-diseases-for-oncology-fourth-edition-icd-o-4-final-tables-now-available\/"},"modified":"2026-07-20T11:53:56","modified_gmt":"2026-07-20T11:53:56","slug":"international-classification-of-diseases-for-oncology-fourth-edition-icd-o-4-final-tables-now-available","status":"publish","type":"news-events","link":"https:\/\/iarc.spherical.horse\/fr\/news-events\/international-classification-of-diseases-for-oncology-fourth-edition-icd-o-4-final-tables-now-available\/","title":{"rendered":"International Classification of Diseases for Oncology, fourth edition (ICD-O-4) final tables now available"},"content":{"rendered":"<p>The International Agency for Research on Cancer (IARC) has published the new fourth edition of the International Classification of Diseases for Oncology (ICD-O-4) tables on the World Health Organization (WHO) Classification of Tumours Online website.<\/p>\r\n<p>ICD-O-4 features a new morphology structure and five-digit morphology codes based on the fifth edition of the WHO Classification of Tumours series. Alongside the updated morphology and topography lists, listings of changes between ICD-O-3.2 and ICD-O-4 are provided as reference material for cancer registries worldwide.<\/p>\r\n<p>The tables, listed below, are available online or as downloadable Excel tables.<\/p>\r\n<p>Changes to morphology codes and terms between ICD-O-3.2 and ICD-O-4:<\/p>\r\n<ul>\r\n\t<li>New morphology codes (4 digits) \u2013 these codes are new to ICD-O-4 (not present in ICD-O-3.2)<\/li>\r\n\t<li>New morphology codes (5 digits) \u2013 first 4 digits present in ICD-O-3.2 and 5th digit different from 0<\/li>\r\n\t<li>Morphology code changes \u2013 changes in the first 4 digits<\/li>\r\n\t<li>Deleted morphology codes \u2013 present in ICD-O-3.2 but not in ICD-O-4<\/li>\r\n\t<li>Behaviour code changes<\/li>\r\n\t<li>New morphology terms<\/li>\r\n\t<li>Morphology term changes<\/li>\r\n\t<li>Deleted morphology terms<br><br><\/li>\r\n<\/ul>\r\n<p>Changes to topography codes and terms between ICD-O-3.2 and ICD-O-4:<\/p>\r\n<ul>\r\n\t<li>New topography codes<\/li>\r\n\t<li>Topography code changes<\/li>\r\n\t<li>New topography terms<\/li>\r\n\t<li>Topography term changes<\/li>\r\n\t<li>Complete list of optional 4-digit topography codes<\/li>\r\n\t<li>New optional topography codes for selected sites<\/li>\r\n\t<li>New terms for optional topography<\/li>\r\n\t<li>Changes of terms for optional topography<br><br><\/li>\r\n<\/ul>\r\n<p><a href=\"https:\/\/tumourclassification.iarc.who.int\/icd-o-4\/\" target=\"_blank\" rel=\"noopener noreferrer\">View the WHO Classification of Tumours Online ICD-O-4 website<\/a>\u00a0<\/p>\r\n<p>&nbsp;<\/p>","protected":false},"featured_media":63252,"template":"","class_list":["post-63253","news-events","type-news-events","status-publish","has-post-thumbnail","hentry","research-topic_taxonomy-cancer-registration-fr","research-topic_taxonomy-tumour-classification-fr"],"acf":[],"_links":{"self":[{"href":"https:\/\/iarc.spherical.horse\/fr\/wp-json\/wp\/v2\/news-events\/63253","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/iarc.spherical.horse\/fr\/wp-json\/wp\/v2\/news-events"}],"about":[{"href":"https:\/\/iarc.spherical.horse\/fr\/wp-json\/wp\/v2\/types\/news-events"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/iarc.spherical.horse\/fr\/wp-json\/wp\/v2\/media\/63252"}],"wp:attachment":[{"href":"https:\/\/iarc.spherical.horse\/fr\/wp-json\/wp\/v2\/media?parent=63253"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}