{"id":4821,"date":"2023-02-23T06:30:00","date_gmt":"2023-02-23T09:30:00","guid":{"rendered":"https:\/\/gastropedia.pub\/pt\/?p=4821"},"modified":"2023-02-28T12:29:26","modified_gmt":"2023-02-28T15:29:26","slug":"quando-indicar-o-contraste-hepatoespecifico-na-avaliacao-de-lesoes-focais-hepaticas","status":"publish","type":"post","link":"https:\/\/gastropedia.pub\/pt\/gastroenterologia\/figado\/quando-indicar-o-contraste-hepatoespecifico-na-avaliacao-de-lesoes-focais-hepaticas\/","title":{"rendered":"Quando indicar o contraste hepatoespec\u00edfico na avalia\u00e7\u00e3o de les\u00f5es focais hep\u00e1ticas?"},"content":{"rendered":"<div class=\"pdfprnt-buttons pdfprnt-buttons-post pdfprnt-top-right\"><a href=\"https:\/\/gastropedia.pub\/pt\/wp-json\/wp\/v2\/posts\/4821?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\/4821?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>Rotineiramente, na resson\u00e2ncia magn\u00e9tica (RM) de abdome, utiliza-se o contraste extracelular inespec\u00edfico (gadol\u00ednio), o qual se distribui conforme a distribui\u00e7\u00e3o dos vasos e capilares sangu\u00edneos e determina, assim, uma padr\u00e3o din\u00e2mico de impregna\u00e7\u00e3o da les\u00e3o focal hep\u00e1tica nas fases arterial, portal (venosa) e equil\u00edbrio.<\/p>\n\n\n\n<p>Em casos selecionados, pode-se indicar os contrastes intracelulares espec\u00edficos, tamb\u00e9m denominados de hepatoespec\u00edficos e que podem ser de duas principais classes: (1) \u00f3xido de ferro superparamagn\u00e9rico e (2) hepatobiliares, sendo este \u00faltimo captado especificamente pelas c\u00e9lulas hep\u00e1ticas e com excre\u00e7\u00e3o renal (50%) e biliar (50%). No Brasil, h\u00e1 a aprova\u00e7\u00e3o do contraste hepatobiliar, conhecido como \u00e1cido gadox\u00e9tico (Gd-EOB-DTPA, Primovist\u00d2).<\/p>\n\n\n\n<p>Desta forma, al\u00e9m de fornecer os dados habituais do estudo din\u00e2mico, h\u00e1 a etapa final de avalia\u00e7\u00e3o hepatobiliar, ap\u00f3s cerca de 10 a 20 minutos da inje\u00e7\u00e3o endovenosa, na qual h\u00e1 a entrada do contraste nos hepat\u00f3citos atrav\u00e9s dos transportadores de membrana (OATP1, B1\/B3) e sa\u00edda atrav\u00e9s de prote\u00ednas dependentes de ATP multif\u00e1rmaco-resistentes (MRP2, MRP3, MRP4), sendo o transportador MRP2 o encarregado em excretar o contraste no canal\u00edculo biliar.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Quais as indica\u00e7\u00f5es do contraste hepatoespec\u00edfico?<\/strong><\/h2>\n\n\n\n<p>Sabendo-se que o \u00e1cido gadox\u00e9tico \u00e9 captado pelos hepat\u00f3citos e excretado em cerca de 50% pela via biliar, espera-se que um tecido hep\u00e1tico normofuncionante seja impregnado pelo contraste na fase hepatobiliar. Desta forma, a n\u00e3o capta\u00e7\u00e3o do \u00e1cido gadox\u00e9tico na fase hepatobiliar infere que n\u00e3o h\u00e1 hepat\u00f3citos ou canal\u00edculos biliares vi\u00e1veis na les\u00e3o avaliada.<\/p>\n\n\n\n<p>Podemos enumerar 3 principais indica\u00e7\u00f5es no uso do \u00e1cido gadox\u00e9tico na avalia\u00e7\u00e3o de les\u00f5es focais hep\u00e1ticas:<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. <strong>Diferencia\u00e7\u00e3o entre hiperplasia nodular focal (HNF) e adenoma<\/strong><\/h3>\n\n\n\n<p>Adenoma e HNF s\u00e3o terceiro e segundo tumores hep\u00e1ticos benignos mais frequentes, respectivamente.<\/p>\n\n\n\n<p>O adenoma \u00e9 caracterizado por cord\u00f5es de hepat\u00f3citos e aus\u00eancia de ductos biliares ou tratos portais, logo, na fase hepatobiliar, n\u00e3o apresenta capta\u00e7\u00e3o na fase hepatobiliar.<\/p>\n\n\n\n<p>J\u00e1 a HNF caracteriza-se por um aglomerado de hepat\u00f3citos hiperpl\u00e1sicos e pequenos canal\u00edculos biliares imaturos que n\u00e3o se comunicam com os maiores, o que pode gerar um ac\u00famulo (reten\u00e7\u00e3o) de contraste hepatoespec\u00edfico na fase hepatobiliar em rela\u00e7\u00e3o ao par\u00eanquima hep\u00e1tico adjacente. Pode-se ainda encontrar uma cicatriz fibrosa central que direciona o padr\u00e3o da les\u00e3o para HNF.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2023\/02\/image.png\" data-rel=\"penci-gallery-image-content\" ><img fetchpriority=\"high\" decoding=\"async\" width=\"568\" height=\"279\" src=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2023\/02\/image.png\" alt=\"\" class=\"wp-image-4822\" srcset=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2023\/02\/image.png 568w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2023\/02\/image-300x147.png 300w\" sizes=\"(max-width: 568px) 100vw, 568px\" \/><\/a><figcaption class=\"wp-element-caption\">                                              Fonte: arquivo pessoal, em colabora\u00e7\u00e3o com <strong>Dra \u00c2ngela Caiado<\/strong><br><br><strong>Figura 1<\/strong>. N\u00f3dulo hipervascularizado no segmento VII hep\u00e1tico medindo 1,2 cm, com padr\u00e3o de reten\u00e7\u00e3o do contraste hepatoespec\u00edfico (tardia, 20 minutos), compat\u00edvel com hiperplasia nodular focal. <br>.<\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">2. <strong>Avalia\u00e7\u00e3o de n\u00f3dulos hep\u00e1ticos em pacientes cirr\u00f3ticos<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>N\u00f3dulos regenerativos e displ\u00e1sicos x neopl\u00e1sicos (carcinoma hepatocelular, CHC)<\/li>\n\n\n\n<li>Identifica\u00e7\u00e3o de pequenos CHCs (&lt;2cm) e melhor avalia\u00e7\u00e3o de les\u00f5es focais com comportamento at\u00edpico em exame contrastado pr\u00e9vio, com realce inespec\u00edfico.<\/li>\n<\/ul>\n\n\n\n<p>O CHC \u00e9 o tumor prim\u00e1rio do f\u00edgado mais comum. No paciente cirr\u00f3tico, um n\u00f3dulo igual ou maior que 2,0cm de di\u00e2metro, com padr\u00e3o t\u00edpico hipervascular na fase arterial <em>(wash-in)<\/em> e com clareamento nas fases tardias <em>(wash-out)<\/em> \u00e9 diagnosticado como CHC.<\/p>\n\n\n\n<p>Em les\u00f5es menores que 2 cm, os achados t\u00edpicos n\u00e3o costumam ser vistos com frequ\u00eancia, em especial nos CHCs iniciais bem diferenciados. Nesses casos, o estudo com contraste hepatoespec\u00edfico pode contribuir com achados adicionais, sendo desafiador a distin\u00e7\u00e3o entre n\u00f3dulo displ\u00e1sico de alto grau e CHC bem diferenciado.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><a href=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2023\/02\/image-1.png\" data-rel=\"penci-gallery-image-content\" ><img decoding=\"async\" src=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2023\/02\/image-1.png\" alt=\"\" class=\"wp-image-4823\" width=\"569\" height=\"133\" srcset=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2023\/02\/image-1.png 569w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2023\/02\/image-1-300x70.png 300w\" sizes=\"(max-width: 569px) 100vw, 569px\" \/><\/a><figcaption class=\"wp-element-caption\">                                                Fonte: arquivo pessoal, em colabora\u00e7\u00e3o com <strong>Dra \u00c2ngela Caiado<\/strong>.<br><br><strong>Figura 2.<\/strong> N\u00f3dulo na face anterior do segmento II\/III, medindo 1,2 cm, com realce na fase arterial, clareamento precoce e sem reten\u00e7\u00e3o na fase hepatoespec\u00edfica.<br><\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">3. <strong>Avalia\u00e7\u00e3o de met\u00e1stases hep\u00e1ticas<\/strong><\/h3>\n\n\n\n<p>As les\u00f5es metast\u00e1ticas n\u00e3o possuem hepat\u00f3citos ou ductos biliares funcionantes, logo, n\u00e3o h\u00e1 a capta\u00e7\u00e3o de contraste na fase hepatobiliar. Al\u00e9m disso, a capta\u00e7\u00e3o do contraste hepatoespec\u00edfico pelos hepat\u00f3citos do par\u00eanquima normal aumenta a diferen\u00e7a de contrasta\u00e7\u00e3o com as les\u00f5es metast\u00e1ticas (hipointensas), elevando a sensibilidade da detec\u00e7\u00e3o das mesmas.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2023\/02\/image-12.png\" data-rel=\"penci-gallery-image-content\" ><img decoding=\"async\" width=\"564\" height=\"380\" src=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2023\/02\/image-12.png\" alt=\"\" class=\"wp-image-5056\" srcset=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2023\/02\/image-12.png 564w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2023\/02\/image-12-300x202.png 300w\" sizes=\"(max-width: 564px) 100vw, 564px\" \/><\/a><figcaption class=\"wp-element-caption\">                                                Fonte: arquivo pessoal, em colabora\u00e7\u00e3o com <strong>Dra \u00c2ngela Caiado<\/strong>.<br><br><strong>Figura 3.<\/strong> Met\u00e1stases hep\u00e1ticas em paciente com neoplasia de c\u00f3lon. H\u00e1 sinais de hepatectomia direito com aumento compensat\u00f3rio do lobo esquerdo. Nas les\u00f5es metast\u00e1ticas, nota-se realce arterial perif\u00e9rico com lavagem e aus\u00eancia de reten\u00e7\u00e3o na fase hepatoespec\u00edfica.<br><\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"has-text-align-center has-background\" style=\"background-color:#d7d7d987\">Em resumo, na Tabela 1, pode-se identificar os padr\u00f5es t\u00edpicos das les\u00f5es hep\u00e1ticas focais nas fases contrastadas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Tabela 1. Caracter\u00edsticas das les\u00f5es hep\u00e1ticas focais nas fases din\u00e2micas e hepatobiliar<\/strong><\/h3>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2023\/02\/image-3.png\" data-rel=\"penci-gallery-image-content\" ><img loading=\"lazy\" decoding=\"async\" width=\"571\" height=\"192\" src=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2023\/02\/image-3.png\" alt=\"\" class=\"wp-image-4825\" srcset=\"https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2023\/02\/image-3.png 571w, https:\/\/gastropedia.pub\/pt\/wp-content\/uploads\/2023\/02\/image-3-300x101.png 300w\" sizes=\"(max-width: 571px) 100vw, 571px\" \/><\/a><figcaption class=\"wp-element-caption\"><strong>CHC: carcinoma hepatocelular.<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><strong>Pontos de reflex\u00e3o sobre o contraste hepatoespec\u00edfico<\/strong><\/h2>\n\n\n\n<p>Al\u00e9m do maior custo, \u00e9 descrito na literatura a maior ocorr\u00eancia de artefatos respirat\u00f3rios ap\u00f3s a inje\u00e7\u00e3o do contraste hepatoespec\u00edfico na fase arterial em alguns pacientes, podendo estar relacionado \u00e0 dificuldade de se sustentar a apn\u00e9ia e\/ou dispneia subjetiva.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Conclus\u00e3o<\/strong><\/h2>\n\n\n\n<p class=\"has-background\" style=\"background-color:#d7d7d987\">O contraste hepatoespec\u00edfico aumenta a acur\u00e1cia diagn\u00f3stica na detec\u00e7\u00e3o e caracteriza\u00e7\u00e3o de les\u00f5es focais hep\u00e1ticas, em especial nas mencionadas na Tabela 1, e devem ser avaliadas de acordo com o quadro cl\u00ednico dos pacientes. <br>N\u00f3dulos com padr\u00e3o at\u00edpico nos exames contrastados devem ser avaliados caso a caso, podendo ser indicados a bi\u00f3psia hep\u00e1tica para adequada elucida\u00e7\u00e3o ou exames de imagem peri\u00f3dicos para seguimento.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Refer\u00eancias<\/strong><\/h2>\n\n\n\n<ol class=\"wp-block-list\" type=\"1\">\n<li>Palmucci S. Focal liver lesions detection and characterization: The advantages of gadoxetic acid-enhanced liver MRI. World J Hepatol. 2014 Jul 27;6(7):477-85. doi: 10.4254\/wjh.v6.i7.477. PMID: 25067999; PMCID: PMC4110539.<\/li>\n\n\n\n<li>European Association for the Study of the Liver (EASL). EASL Clinical Practice Guidelines on the management of benign liver tumours. J Hepatol. 2016 Aug;65(2):386-98. doi: 10.1016\/j.jhep.2016.04.001. Epub 2016 Apr 13. PMID: 27085809.<\/li>\n\n\n\n<li>Hyperintense Liver Masses at Hepatobiliary Phase Gadoxetic Acid\u2013enhanced MRI: Imaging Appearances and Clinical Importance. Nobuhiro Fujita, Akihiro Nishie, Yoshiki Asayama, Kousei Ishigami, Yasuhiro Ushijima, Daisuke Kakihara, Tomohiro Nakayama, Koichiro Morita, Keisuke Ishimatsu, and Hiroshi Honda. RadioGraphics 2020 40:1, 72-94.<\/li>\n\n\n\n<li>Moosavi, B., Shenoy-Bhangle, A.S., Tsai, L.L. et al. MRI characterization of focal liver lesions in non-cirrhotic patients: assessment of added value of gadoxetic acid-enhanced hepatobiliary phase imaging. Insights Imaging 11, 101 (2020). https:\/\/doi.org\/10.1186\/s13244-020-00894-3.<\/li>\n\n\n\n<li>Roberts LR, Sirlin CB, Zaiem F, Almasri J, Prokop LJ, Heimbach JK, Murad MH, Mohammed K. Imaging for the diagnosis of hepatocellular carcinoma: A systematic review and meta-analysis. Hepatology. 2018 Jan;67(1):401-421. doi: 10.1002\/hep.29487. Epub 2017 Nov 29. PMID: 28859233.<\/li>\n\n\n\n<li>Koh, DM., Ba-Ssalamah, A., Brancatelli, G. et al. Consensus report from the 9th International Forum for Liver Magnetic Resonance Imaging: applications of gadoxetic acid-enhanced imaging. Eur Radiol 31, 5615\u20135628 (2021). https:\/\/doi.org\/10.1007\/s00330-020-07637-4.<\/li>\n\n\n\n<li>Glessgen CG, Breit HC, Block TK, Merkle EM, Heye T, Boll DT. Respiratory anomalies associated with gadoxetate disodium and gadoterate meglumine: compressed sensing MRI revealing physiologic phenomena during the entire injection cycle. Eur Radiol. 2022 Jan;32(1):346-354. doi: 10.1007\/s00330-021-08114-2. Epub 2021 Jul 29. PMID: 34324024; PMCID: PMC8660712.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Como citar este artigo<\/strong><\/h2>\n\n\n\n<p class=\"has-background\" style=\"background-color:#d7d7d98c\">Oti, KST. Quando indicar o contraste hepatoespec\u00edfico na avalia\u00e7\u00e3o de les\u00f5es focais hep\u00e1ticas? Gastropedia 2023, vol. 1. Dispon\u00edvel em: <a href=\"https:\/\/gastropedia.pub\/pt\/?p=4821\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/gastropedia.pub\/pt\/gastroenterologia\/quando-indicar-o-contraste-hepatoespecifico-na-avaliacao-de-lesoes-focais-hepaticas<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rotineiramente, na resson\u00e2ncia magn\u00e9tica (RM) de abdome, utiliza-se o contraste extracelular inespec\u00edfico (gadol\u00ednio), o qual se distribui conforme a distribui\u00e7\u00e3o dos vasos e capilares sangu\u00edneos e determina, assim, uma padr\u00e3o&hellip;<\/p>\n","protected":false},"author":5590,"featured_media":4824,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[21,18],"tags":[],"ano":[137],"tipo":[121],"volume":[57],"class_list":["post-4821","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-figado","category-gastroenterologia","ano-137","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>Quando indicar o contraste hepatoespec\u00edfico na avalia\u00e7\u00e3o de les\u00f5es focais hep\u00e1ticas? 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