{"id":4546,"date":"2018-05-25T09:00:41","date_gmt":"2018-05-25T09:00:41","guid":{"rendered":"https:\/\/endoscopiaterapeutica.net\/pt\/?p=4546"},"modified":"2024-06-04T19:41:14","modified_gmt":"2024-06-04T19:41:14","slug":"pseudolipomatose-de-colon","status":"publish","type":"post","link":"https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/pseudolipomatose-de-colon\/","title":{"rendered":"Pseudolipomatose de c\u00f3lon"},"content":{"rendered":"<h2><strong>Introdu\u00e7\u00e3o e etiopatologia<\/strong><\/h2>\n<p>A pseudolipomatose do c\u00f3lon foi descrita pela primeira vez em 1985(1) e desde ent\u00e3o, diferentes patogenias foram postuladas para esta condi\u00e7\u00e3o, incluindo penetra\u00e7\u00e3o intramucosa do ar durante insufla\u00e7\u00e3o (barotrauma), bi\u00f3psias ou outros procedimentos.<\/p>\n<p>No entanto, evid\u00eancias mostraram sua associa\u00e7\u00e3o com colite qu\u00edmica causada pelo per\u00f3xido de hidrog\u00eanio (H<sub>2<\/sub>O<sub>2<\/sub>) ap\u00f3s desinfec\u00e7\u00e3o com \u00e1cido perac\u00e9tico. Quando o \u00e1cido perac\u00e9tico se dissolve em \u00e1gua, ele se decomp\u00f5e em per\u00f3xido de hidrog\u00eanio e \u00e1cido ac\u00e9tico, que, por sua vez, se transforma em \u00e1gua, oxig\u00eanio e di\u00f3xido de carbono. Assim, o per\u00f3xido de hidrog\u00eanio resultante induz colite qu\u00edmica causada pela irrita\u00e7\u00e3o direta da mucosa(2).<\/p>\n<p>Entretanto, h\u00e1 dois relatos na literatura que descreveram seu aparecimento ap\u00f3s desinfec\u00e7\u00e3o de alto n\u00edvel com \u00e1gua \u00e1cida eletrolisada(3) e Sterilox\u00a0(\u00e1gua super oxidada)(4); sua patog\u00eanese \u00e9 incerta, pois sabe-se, que, em ambos, n\u00e3o h\u00e1 produ\u00e7\u00e3o do per\u00f3xido de hidrog\u00eanio.<\/p>\n<h2><strong>Endoscopia<\/strong><\/h2>\n<p>Endoscopicamente, caracterizam-se por placas elevadas, tipicamente esbranqui\u00e7adas ou branco-amareladas, aderentes, m\u00faltiplas e isoladas, tamb\u00e9m denominadas de \u201csnow white sign\u201d ou \u201cfrozen sign\u201d. Seus tamanhos variam de mil\u00edmetros a cent\u00edmetros e s\u00e3o encontradas tanto no c\u00f3lon esquerdo quanto no direito.<\/p>\n<p><a href=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2021\/08\/1-1.jpg\" data-rel=\"penci-gallery-image-content\" ><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter wp-image-8253 size-medium\" src=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2021\/08\/1-1.jpg\" alt=\"\" width=\"300\" height=\"228\" \/><\/a><a href=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2018\/05\/2-300x228-1.jpg\" data-rel=\"penci-gallery-image-content\" ><img decoding=\"async\" class=\"aligncenter wp-image-8202 size-full\" src=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2018\/05\/2-300x228-1.jpg\" alt=\"\" width=\"300\" height=\"228\" \/><\/a><\/p>\n<h2><strong>Mecanismos de contato<\/strong><\/h2>\n<p>H\u00e1 dois mecanismos poss\u00edveis de contato da subst\u00e2ncia com a mucosa, ambos em decorr\u00eancia da utiliza\u00e7\u00e3o de aparelhos n\u00e3o enxaguados adequadamente:<\/p>\n<ol>\n<li>ap\u00f3s irriga\u00e7\u00e3o de \u00e1gua pelos canais de \u00e1gua\/ar, de trabalho, de corantes (colonosc\u00f3pios Fujinon) ou pelo canal acess\u00f3rio (colonosc\u00f3pios Olympus);<\/li>\n<li>em decorr\u00eancia da insufla\u00e7\u00e3o de ar durante a inser\u00e7\u00e3o do aparelho no paciente, na qual ocorre pulveriza\u00e7\u00e3o do vapor de per\u00f3xido de hidrog\u00eanio.<\/li>\n<\/ol>\n<p>Na primeira situa\u00e7\u00e3o, as les\u00f5es aparecem imediatamente sob vis\u00e3o direta e tem aspecto efervescente; na segunda, elas podem ser desencadeadas \u00e0 dist\u00e2ncia, antes mesmo do aparelho chegar ao local, simulando les\u00f5es pr\u00e9-existentes e confundindo o colonoscopista.<\/p>\n<h2><strong>Histologia<\/strong><\/h2>\n<p>A histologia mostra criptas aparentemente preservadas, por\u00e9m espa\u00e7adas por numerosos vac\u00faolos vazios, que correspondem a gases sequestrados (setas), semelhantes a adip\u00f3citos. A imuno-histoqu\u00edmica e an\u00e1lise ultraestrutural confirmam aus\u00eancia de conte\u00fado lip\u00eddico, o que originou o termo \u201cpseudolipomatose\u201d. Estes achados foram reproduzidos em laborat\u00f3rio ap\u00f3s instila\u00e7\u00e3o de H<sub>2<\/sub>O<sub>2 <\/sub>em c\u00f3lon de cobaias(5).<\/p>\n<h2><strong>Evolu\u00e7\u00e3o cl\u00ednica<\/strong><\/h2>\n<p>Os pacientes geralmente evoluem sem sintomas, mas podem apresentar, em raras exce\u00e7\u00f5es, dor abdominal leve e sangramento retal. As les\u00f5es regridem espontaneamente, n\u00e3o havendo necessidade de tratamento espec\u00edfico ou hospitaliza\u00e7\u00e3o. N\u00e3o \u00e9 achado exclusivo do c\u00f3lon; pode ocorrer em qualquer mucosa do trato digest\u00f3rio. Portanto, todo cuidado deve ser dado durante o enxague dos aparelhos, para que o \u00e1cido perac\u00e9tico e o per\u00f3xido de hidrog\u00eanio sejam completamente eliminados da superf\u00edcie e dos canais dos aparelhos, especialmente o dos corantes dos colonosc\u00f3pios da Fujinon(6,7).<\/p>\n<div id=\"attachment_8204\" style=\"width: 615px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2018\/05\/Imagem1.jpg\" data-rel=\"penci-gallery-image-content\" ><img decoding=\"async\" aria-describedby=\"caption-attachment-8204\" class=\"wp-image-8204\" src=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2018\/05\/Imagem1-300x123.jpg\" alt=\"\" width=\"605\" height=\"248\" srcset=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2018\/05\/Imagem1-300x123.jpg 300w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2018\/05\/Imagem1-585x240.jpg 585w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2018\/05\/Imagem1.jpg 640w\" sizes=\"(max-width: 605px) 100vw, 605px\" \/><\/a><p id=\"caption-attachment-8204\" class=\"wp-caption-text\">Aspecto histol\u00f3gico de pseudolipomatose do c\u00f3lon (A- HE, 40x e B- HE, 250 x), com gl\u00e2ndulas c\u00f3licas aparentemente preservadas, espa\u00e7adas pela presen\u00e7a de numerosos vac\u00faolos vazios, que correspondem a gases sequestrados (setas), simulando \u201cadip\u00f3citos\u201d.<\/p><\/div>\n<h2><strong>Conclus\u00e3o:<\/strong><\/h2>\n<p>A pseudolipomatose do c\u00f3lon \u00e9 condi\u00e7\u00e3o iatrog\u00eanica rara, benigna e autolimitada, que, geralmente, se apresenta de forma assintom\u00e1tica, com raros quadros de dor abdominal leve e sangramento retal. N\u00e3o \u00e9 achado exclusivo do c\u00f3lon; pode ocorrer em qualquer mucosa do trato digest\u00f3rio. O aspecto endosc\u00f3pico e os achados histopatol\u00f3gicos s\u00e3o caracter\u00edsticos e as les\u00f5es regridem espontaneamente, n\u00e3o havendo necessidade de tratamento espec\u00edfico ou hospitaliza\u00e7\u00e3o.<\/p>\n<h2><strong>Refer\u00eancias:<\/strong><\/h2>\n<p>(1)\u00a0 Snover DC, Sandstad J, Hutton S. Mucosal pseudolipomatosis of the colon. Am J Clin Pathol 1985; 84:575-580.<\/p>\n<p>(2)\u00a0 Kara M, Turan I, Polat Z, Dogru T, Bagci S. Chemical colitis caused by peracetic acid or hydrogen peroxide: a challenging dilemma. Endoscopy 2010;42 Suppl 2:E3-4.<\/p>\n<p>(3)\u00a0 Souza JLS, Ribeiro TM, Borges LV, da Silva JGN. Electrolyzed acid water can cause colitis? Endoscopy 2008;40(7):620.<\/p>\n<p>(4)\u00a0 Suzuki N, Talbot IC, Saunders BP. The \u201cfrost sign\u201d: an inadvertent minor complication of endoscopic mucosal resection. Endoscopy 2004;36(9):835.<\/p>\n<p>(5)\u00a0 Zullo A., Hassan C., Guarini A., Lorenzetti R., Campo S., Morini S. Chemical Colitis due to Peracetic Acid: a case report and review of Literature. Journal of Digestive Endoscopy 2011; 2(1):15-17.<\/p>\n<p>(6)\u00a0 Cammarota G, Cesaro P, Cazzato A, Fedeli P, Riccioni ME, Sparano L, Vitale G, Costamagna G, Gasbarrini G, Larocca LM. Hydrogen peroxide-related colitis (previously known as &#8220;pseudolipomatosis&#8221;): a series of cases occurring in an epidemic pattern. Endoscopy 2007; 39:916-919.<\/p>\n<p>(7)\u00a0 Coriat R, Chaput U, Ismaili Z, Chaussade S. What induces colitis? Hydrogen peroxide or peracetic acid. Endoscopy 2008;40(3):231.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introdu\u00e7\u00e3o e etiopatologia A pseudolipomatose do c\u00f3lon foi descrita pela primeira vez em 1985(1)&hellip;<\/p>\n","protected":false},"author":1598,"featured_media":4545,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[151],"tags":[],"ano":[270],"tipo":[156],"volume":[263],"class_list":["post-4546","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-assuntosgerais","ano-270","tipo-colonoscopia","volume-volume-i"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Pseudolipomatose de c\u00f3lon &#8226; Endoscopia Terapeutica<\/title>\n<meta name=\"description\" content=\"A pseudolipomatose do c\u00f3lon \u00e9 condi\u00e7\u00e3o rara, benigna e autolimitada, que geralmente se apresenta de forma assintom\u00e1tica, com raros casos de dor abdominal e sangramento retal\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/pseudolipomatose-de-colon\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pseudolipomatose de c\u00f3lon\" \/>\n<meta property=\"og:description\" content=\"Introdu\u00e7\u00e3o e etiopatologia A pseudolipomatose do c\u00f3lon foi descrita pela primeira vez em 1985(1) e desde ent\u00e3o, diferentes patogenias foram postuladas\" \/>\n<meta property=\"og:url\" content=\"https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/pseudolipomatose-de-colon\/\" \/>\n<meta property=\"og:site_name\" content=\"Endoscopia Terapeutica\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/endoscopiaterapeutica\" \/>\n<meta property=\"article:published_time\" content=\"2018-05-25T09:00:41+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-06-04T19:41:14+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2021\/08\/1-1.jpg?v=1628200522\" \/>\n\t<meta property=\"og:image:width\" content=\"640\" \/>\n\t<meta property=\"og:image:height\" content=\"487\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Elisa Ryoka Baba\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Elisa Ryoka Baba\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. tempo de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/endoscopiaterapeutica.net\\\/pt\\\/assuntosgerais\\\/pseudolipomatose-de-colon\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/endoscopiaterapeutica.net\\\/pt\\\/assuntosgerais\\\/pseudolipomatose-de-colon\\\/\"},\"author\":{\"name\":\"Elisa Ryoka Baba\",\"@id\":\"https:\\\/\\\/endoscopiaterapeutica.net\\\/pt\\\/#\\\/schema\\\/person\\\/1ff4763ff418d3c419ebcfab06491e4d\"},\"headline\":\"Pseudolipomatose de c\u00f3lon\",\"datePublished\":\"2018-05-25T09:00:41+00:00\",\"dateModified\":\"2024-06-04T19:41:14+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/endoscopiaterapeutica.net\\\/pt\\\/assuntosgerais\\\/pseudolipomatose-de-colon\\\/\"},\"wordCount\":806,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/endoscopiaterapeutica.net\\\/pt\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/endoscopiaterapeutica.net\\\/pt\\\/assuntosgerais\\\/pseudolipomatose-de-colon\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/endoscopiaterapeutica.net\\\/pt\\\/wp-content\\\/uploads\\\/2021\\\/08\\\/1-1.jpg?v=1628200522\",\"articleSection\":[\"Assuntos Gerais\"],\"inLanguage\":\"pt-BR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/endoscopiaterapeutica.net\\\/pt\\\/assuntosgerais\\\/pseudolipomatose-de-colon\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/endoscopiaterapeutica.net\\\/pt\\\/assuntosgerais\\\/pseudolipomatose-de-colon\\\/\",\"url\":\"https:\\\/\\\/endoscopiaterapeutica.net\\\/pt\\\/assuntosgerais\\\/pseudolipomatose-de-colon\\\/\",\"name\":\"Pseudolipomatose de c\u00f3lon &#8226; 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