{"id":7881,"date":"2024-01-25T07:06:00","date_gmt":"2024-01-25T10:06:00","guid":{"rendered":"https:\/\/gastropedia.pub\/pt\/?p=7881"},"modified":"2025-03-03T18:19:23","modified_gmt":"2025-03-03T21:19:23","slug":"metaplasia-intestinal-gastrica-qual-o-risco-e-o-que-fazer","status":"publish","type":"post","link":"https:\/\/gastropedia.pub\/pt\/gastroenterologia\/metaplasia-intestinal-gastrica-qual-o-risco-e-o-que-fazer\/","title":{"rendered":"Metaplasia intestinal g\u00e1strica: qual o risco e o que fazer?"},"content":{"rendered":"<div class=\"pdfprnt-buttons pdfprnt-buttons-post pdfprnt-top-right\"><a href=\"https:\/\/gastropedia.pub\/pt\/wp-json\/wp\/v2\/posts\/7881?print=pdf\" class=\"pdfprnt-button pdfprnt-button-pdf\" target=\"_blank\" ><img decoding=\"async\" src=\"https:\/\/gastropedia.pub\/pt\/wp-content\/plugins\/pdf-print\/images\/pdf.png\" alt=\"image_pdf\" title=\"Ver PDF\" \/><\/a><a href=\"https:\/\/gastropedia.pub\/pt\/wp-json\/wp\/v2\/posts\/7881?print=print\" class=\"pdfprnt-button pdfprnt-button-print\" target=\"_blank\" ><img decoding=\"async\" src=\"https:\/\/gastropedia.pub\/pt\/wp-content\/plugins\/pdf-print\/images\/print.png\" alt=\"image_print\" title=\"Conte\u00fado de impress\u00e3o\" \/><\/a><\/div>\n<p><\/p>\n\n\n\n<p><em>\u201cDoutor, o que \u00e9 essa metaplasia que apareceu na minha endoscopia? Eu li no Google que ela vira c\u00e2ncer de est\u00f4mago! O que eu fa\u00e7o agora?\u201d<\/em> \u2013 essa \u00e9 uma preocupa\u00e7\u00e3o que provavelmente voc\u00ea j\u00e1 ouviu no consult\u00f3rio m\u00e9dico. Mas e, ent\u00e3o, voc\u00ea sabe o que responder e o que fazer?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-o-que-e\">O que \u00e9?<\/h2>\n\n\n\n<p>A<strong> inflama\u00e7\u00e3o cr\u00f4nica<\/strong> no est\u00f4mago gera um processo regenerativo que <strong>pode estimular a transforma\u00e7\u00e3o da mucosa g\u00e1strica<\/strong> em c\u00e9lulas mais parecidas com aquelas que revestem os intestinos, o que chamamos de <strong>metaplasia intestinal (MI).<\/strong><\/p>\n\n\n\n<p>A <strong>preval\u00eancia<\/strong> de MI \u00e9 <strong>vari\u00e1vel conforme a popula\u00e7\u00e3o estudada<\/strong> (relaciona-se, por exemplo, \u00e0 preval\u00eancia de <em>H. pylori<\/em>), sendo estimada em 4,8% nos Estados Unidos, mas em at\u00e9 25% em algumas popula\u00e7\u00f5es asi\u00e1ticas. Al\u00e9m disso, estudos demonstram uma <strong>maior preval\u00eancia em faixas de idade mais avan\u00e7adas<\/strong>. N\u00e3o h\u00e1 sintomas espec\u00edficos associados com a metaplasia em si.<\/p>\n\n\n\n<p>Mas se essa transforma\u00e7\u00e3o que leva \u00e0 MI \u00e9 consequ\u00eancia de uma inflama\u00e7\u00e3o g\u00e1strica, <strong>quais seriam os fatores que podem predispor ou acelerar essa evolu\u00e7\u00e3o<\/strong>?<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><em><strong>Helicobacter pylori<\/strong><\/em>: Sem d\u00favidas, \u00e9 o principal fator de risco para les\u00f5es pr\u00e9-cancer\u00edgenas g\u00e1stricas. O <em>H. pylori<\/em> aumenta a chance de c\u00e2ncer g\u00e1strico em 2 a 3 vezes.<\/li>\n\n\n\n<li><strong>Gastrite autoimune<\/strong>: Aumento do risco de tumores neuroend\u00f3crinos g\u00e1stricos tipo I e de adenocarcinoma.<\/li>\n\n\n\n<li><strong>Tabagismo<\/strong><\/li>\n\n\n\n<li><strong>Refluxo biliar<\/strong><\/li>\n\n\n\n<li><strong>Dieta<\/strong>: vegetais e frutas s\u00e3o geralmente fatores protetores, ao passo que dietas ricas em sal, processados, defumados e alimentos ricos em nitrosaminas aumentam o risco.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-como-identificar\">Como identificar?<\/h2>\n\n\n\n<p>Na endoscopia com luz branca, a <strong>metaplasia intestinal apresenta-se superficialmente elevada ou com \u00e1reas planas esbranqui\u00e7adas<\/strong>. Tamb\u00e9m pode aparecer como <strong>placas da mesma cor da mucosa adjacente ou at\u00e9 \u00e1reas ligeiramente deprimidas e avermelhadas<\/strong>. Se dispon\u00edveis, equipamentos de alta defini\u00e7\u00e3o e cromoscopia s\u00e3o superiores a endosc\u00f3pios de alta defini\u00e7\u00e3o com luz convencional, pois podem direcionar as bi\u00f3psias para \u00e1reas mais representativas e com maior risco de malignidade (Figura 1).<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-1-Metaplasia.png\" data-rel=\"penci-gallery-image-content\" ><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"368\" src=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-1-Metaplasia-1024x368.png\" alt=\"\" class=\"wp-image-7882\" srcset=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-1-Metaplasia-1024x368.png?v=1705668911 1024w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-1-Metaplasia-300x108.png?v=1705668911 300w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-1-Metaplasia-768x276.png?v=1705668911 768w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-1-Metaplasia-1170x421.png?v=1705668911 1170w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-1-Metaplasia-585x210.png?v=1705668911 585w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-1-Metaplasia.png?v=1705668911 1357w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\"><br><strong>Figura 1:<\/strong><br>Metaplasia intestinal (MI) em antro g\u00e1strico. \u00c0 esquerda, exame sob luz branca e, \u00e0 direita, exame com cromoscopia \u00f3ptica (LCI), onde \u00e9 mais f\u00e1cil reconhecer a extens\u00e3o da MI.<\/figcaption><\/figure>\n\n\n\n<p>De forma an\u00e1loga ao que temos para gastrite atr\u00f3fica, tamb\u00e9m temos um <strong>sistema de classifica\u00e7\u00e3o para estadiamento da metaplasia<\/strong>, o <em>Operative Link on Gastritis Assessment based on Intestinal Metaplasia<\/em> (OLGIM). Para tal, s\u00e3o necess\u00e1rias bi\u00f3psias do antro (+ incisura) e do corpo g\u00e1strico (na pequena e na grande curvatura de cada regi\u00e3o), que devem ser identificadas em frascos separados (Figura 2). <strong>A endoscopia precisa ser de alta qualidade para excluir est\u00e1gios avan\u00e7ados de atrofia e metaplasia<\/strong>. No caso de les\u00f5es suspeitas vis\u00edveis, deve-se realizar bi\u00f3psias adicionais.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-2-OLGIM.png\" data-rel=\"penci-gallery-image-content\" ><img decoding=\"async\" width=\"1024\" height=\"617\" src=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-2-OLGIM-1024x617.png\" alt=\"\" class=\"wp-image-7884\" srcset=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-2-OLGIM-1024x617.png?v=1705669154 1024w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-2-OLGIM-300x181.png?v=1705669154 300w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-2-OLGIM-768x463.png?v=1705669154 768w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-2-OLGIM-585x352.png?v=1705669154 585w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-2-OLGIM.png?v=1705669154 1162w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\"><br><strong>Figura 2:<\/strong><br>Sistema OLGIM para avalia\u00e7\u00e3o de metaplasia intestinal g\u00e1strica.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-qual-o-risco\">Qual o risco?<\/h2>\n\n\n\n<p>O adenocarcinoma g\u00e1strico tipo intestinal \u00e9 o final da famosa cascata de Pelayo Correa: <strong>inflama\u00e7\u00e3o &#8211;&gt; atrofia &#8211;&gt; metaplasia &#8211;&gt; displasia &#8211;&gt; carcinoma<\/strong>. Logo, tanto a <strong>gastrite atr\u00f3fica como a metaplasia intestinal s\u00e3o consideradas condi\u00e7\u00f5es pr\u00e9-cancer\u00edgenas<\/strong>. Outra infer\u00eancia desta cascata \u00e9 que, se existe metaplasia intestinal g\u00e1strica, significa que tamb\u00e9m h\u00e1 gastrite atr\u00f3fica.<\/p>\n\n\n\n<p>Um dos maiores estudos de seguimento populacional identificou que a <strong>incid\u00eancia anual de c\u00e2ncer g\u00e1strico em pacientes com MI era de 0,25%<\/strong>, com uma incid\u00eancia cumulativa <strong>em 10 anos de 2,4%<\/strong>. No Jap\u00e3o, onde a incid\u00eancia de c\u00e2ncer g\u00e1strico \u00e9 maior, um estudo demonstrou uma incid\u00eancia cumulativa muito maior: 5,3 a 9,8% em 5 anos para MI.<\/p>\n\n\n\n<p class=\"has-very-light-gray-to-cyan-bluish-gray-gradient-background has-background\">Ter a metaplasia intestinal g\u00e1strica n\u00e3o deve ser encarada, portanto, como uma evolu\u00e7\u00e3o obrigat\u00f3ria para o c\u00e2ncer, mas como uma oportunidade de vigil\u00e2ncia para, em caso de evolu\u00e7\u00e3o para displasia ou adenocarcinoma, ser poss\u00edvel o diagn\u00f3stico e tratamento precoces.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-quem-sao-os-pacientes-com-metaplasia-intestinal-que-apresentam-maior-risco-de-evolucao-para-neoplasia\">Quem s\u00e3o os pacientes com metaplasia intestinal que apresentam maior risco de evolu\u00e7\u00e3o para neoplasia?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Extens\u00e3o da metaplasia intestinal: OLGIM III e IV. \u00c9 considerada limitada se restrita a uma regi\u00e3o do est\u00f4mago e extensa se acometer duas (antro e corpo).<\/li>\n\n\n\n<li>Hist\u00f3rico familiar de c\u00e2ncer g\u00e1strico: Embora a maioria dos c\u00e2nceres g\u00e1stricos sejam espor\u00e1dicos, algum tipo de hist\u00f3rico familiar ocorre em at\u00e9 10% dos casos. Ter um familiar de primeiro grau com c\u00e2ncer g\u00e1strico aumenta o risco em 2 a 10 vezes. Acredita-se que esse risco familiar n\u00e3o se deve apenas a uma suscetibilidade gen\u00e9tica herdada, mas tamb\u00e9m a fatores ambientais ou de estilo de vida compartilhados, bem como ao compartilhamento da mesma cepa citot\u00f3xica de <em>H. pylori<\/em>.<\/li>\n\n\n\n<li>Presen\u00e7a de metaplasia intestinal incompleta: o risco de progress\u00e3o para c\u00e2ncer \u00e9 at\u00e9 11x maior quando comparado com metaplasia intestinal completa. Histologicamente, a metaplasia intestinal completa \u00e9 definida por mucosa do tipo intestino delgado com c\u00e9lulas absortivas maduras, c\u00e9lulas caliciformes e borda em escova. J\u00e1 a metaplasia intestinal incompleta \u00e9 semelhante ao epit\u00e9lio do c\u00f3lon com c\u00e9lulas colunares \u201cintermedi\u00e1rias\u201d em v\u00e1rios est\u00e1gios de diferencia\u00e7\u00e3o.<\/li>\n\n\n\n<li>Gastrite atr\u00f3fica autoimune.<\/li>\n\n\n\n<li>Infec\u00e7\u00e3o persistente pelo <em>H. pylori<\/em>, pois n\u00e3o foi poss\u00edvel a erradica\u00e7\u00e3o apesar das tentativas terap\u00eauticas.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-como-acompanhar\">Como acompanhar?<\/h2>\n\n\n\n<p><strong>N\u00e3o existe um tratamento espec\u00edfico<\/strong> para metaplasia intestinal at\u00e9 o momento. Uma vez diagnosticada, o foco \u00e9 controlar os fatores agressores (principalmente <strong>tratamento do <\/strong><em><strong>H. pylori<\/strong><\/em>, mas tamb\u00e9m cessar tabagismo e melhorar dieta) e realizar <strong>vigil\u00e2ncia endosc\u00f3pica<\/strong> <strong>em casos selecionados <\/strong>que apresentem maior risco de evolu\u00e7\u00e3o para c\u00e2ncer.<\/p>\n\n\n\n<p>Um dos principais fluxogramas para guiar esse seguimento \u00e9 o <strong>Consenso MAPS II<\/strong> (<em>Management of epithelial precancerous conditions and lesions in the stomach<\/em>), que foi publicado em 2019 pela ESGE (Sociedade Europeia de Endoscopia Gastrointestinal) e est\u00e1 resumido na Figura 3.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-3-fluxograma.png\" data-rel=\"penci-gallery-image-content\" ><img decoding=\"async\" width=\"1024\" height=\"625\" src=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-3-fluxograma-1024x625.png\" alt=\"\" class=\"wp-image-7885\" srcset=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-3-fluxograma-1024x625.png?v=1705669520 1024w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-3-fluxograma-300x183.png?v=1705669520 300w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-3-fluxograma-768x469.png?v=1705669520 768w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-3-fluxograma-1170x715.png?v=1705669520 1170w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-3-fluxograma-585x357.png?v=1705669520 585w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2024\/01\/Post-10-Figura-3-fluxograma.png?v=1705669520 1305w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\"><br><br><strong>Figura 3: <\/strong>Vigil\u00e2ncia de pacientes com metaplasia intestinal g\u00e1strica. Adaptado do Consenso MAPS II (Management of epithelial precancerous conditions and lesions in the stomach), 2019.[1] Atentar que \u00e9 recomendado que tenha sido realizada endoscopia de alta qualidade para excluir est\u00e1gios avan\u00e7ados de atrofia e metaplasia.<\/figcaption><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote has-very-light-gray-to-cyan-bluish-gray-gradient-background has-background is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Conhe\u00e7a nosso curso <strong><a href=\"https:\/\/gastropedia.pub\/pt\/cursos\/gastroenterologia-do-consultorio\/\" target=\"_blank\" rel=\"noreferrer noopener\">Gastroenterologia do Consult\u00f3rio<\/a><\/strong> e saiba como lidar com as queixas mais comuns que encontramos no dia a dia<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-referencias\">Refer\u00eancias<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Pimentel-Nunes P, Lib\u00e2nio D, Marcos-Pinto R, Areia M, Leja M, Esposito G, et al. Management of epithelial precancerous conditions and lesions in the stomach (MAPS II): European Society of Gastrointestinal Endoscopy (ESGE), European Helicobacter and Microbiota Study Group (EHMSG), European Society of Pathology (ESP), and Sociedade Port. Endoscopy 2019;51:365\u201388. doi:10.1055\/a-0859-1883.<\/li>\n\n\n\n<li>Jencks DS, Adam JD, Borum ML, Koh JM, Stephen S, Doman DB. Overview of Current Concepts in Gastric Intestinal Metaplasia and Gastric Cancer. Gastroenterol Hepatol (N Y) 2018;14:92\u2013101. doi:10.1111\/j.1365-2559.1987.tb01893.x.<\/li>\n\n\n\n<li>Sugano K, Moss SF, Kuipers EJ. Gastric Intestinal Metaplasia: Real Culprit or Innocent Bystander as a Precancerous Condition for Gastric Cancer? Gastroenterology 2023;165:1352-1366.e1. doi:10.1053\/j.gastro.2023.08.028.<\/li>\n\n\n\n<li>Gupta S, Li D, El Serag HB, Davitkov P, Altayar O, Sultan S, et al. AGA Clinical Practice Guidelines on Management of Gastric Intestinal Metaplasia. Gastroenterology 2020;158:693\u2013702. doi:10.1053\/j.gastro.2019.12.003.<\/li>\n\n\n\n<li>White JR, Banks M. Identifying the pre-malignant stomach: From guidelines to practice. Transl Gastroenterol Hepatol 2022;7:1\u201313. doi:10.21037\/tgh.2020.03.03.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-como-citar-este-artigo\">Como citar este artigo<\/h2>\n\n\n\n<p class=\"has-very-light-gray-to-cyan-bluish-gray-gradient-background has-background\">Lages RB. Metaplasia intestinal g\u00e1strica: qual o risco e o que fazer? Gastropedia 2024, vol. 1. Dispon\u00edvel em: <br>gastropedia.pub\/pt\/gastroenterologia\/metaplasia-intestinal-gastrica-qual-o-risco-e-o-que-fazer\/<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u201cDoutor, o que \u00e9 essa metaplasia que apareceu na minha endoscopia? Eu li no Google que ela vira c\u00e2ncer de est\u00f4mago! O que eu fa\u00e7o agora?\u201d \u2013 essa \u00e9 uma&hellip;<\/p>\n","protected":false},"author":4165,"featured_media":7885,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[20,18,397],"tags":[],"ano":[396],"tipo":[121],"volume":[57],"class_list":["post-7881","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-estomago","category-gastroenterologia","category-traducao","ano-396","tipo-assuntos-gerais","volume-volume-i"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Metaplasia intestinal g\u00e1strica: qual o risco e o que fazer? - Gastropedia<\/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:\/\/gastropedia.pub\/pt\/gastroenterologia\/metaplasia-intestinal-gastrica-qual-o-risco-e-o-que-fazer\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Metaplasia intestinal g\u00e1strica: qual o risco e o que fazer?\" \/>\n<meta property=\"og:description\" content=\"\u201cDoutor, o que \u00e9 essa metaplasia que apareceu na minha endoscopia? 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