{"id":12640,"date":"2022-07-08T07:00:00","date_gmt":"2022-07-08T07:00:00","guid":{"rendered":"https:\/\/endoscopiaterapeutica.net\/pt\/?p=12640"},"modified":"2022-07-12T17:12:13","modified_gmt":"2022-07-12T17:12:13","slug":"assuntos-gerais-retite-actinica","status":"publish","type":"post","link":"https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/assuntos-gerais-retite-actinica\/","title":{"rendered":"Assuntos gerais: Retite Act\u00ednica"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Introdu\u00e7\u00e3o<\/h2>\n\n\n\n<p><\/p>\n\n\n\n<p>A Radioterapia hoje \u00e9 a base de muitos tratamentos m\u00e9dicos, principalmente em oncologia. O seu uso se baseia na capacidade da radia\u00e7\u00e3o lesar c\u00e9lulas em crescimento, como as neopl\u00e1sicas, alterando seu DNA, lip\u00eddeos e prote\u00ednas, levando a morte. Infelizmente radia\u00e7\u00e3o n\u00e3o afeta apenas as c\u00e9lulas neopl\u00e1sicas, acaba lesando tamb\u00e9m as c\u00e9lulas e tecido normais , adjacentes a les\u00e3o, ent\u00e3o envolvidas no campo irradiado. As t\u00e9cnicas modernas de radioterapia (intensidade modulada, conformacional em 3D) reduzem estes efeitos colaterais nos tecidos sadios, mas n\u00e3o os evitam totalmente.<\/p>\n\n\n\n<p>Com o crescente uso de radioterapia para tratamento dos tumores p\u00e9lvicos, pudemos observar o aparecimento de v\u00e1rias complica\u00e7\u00f5es locais, sendo uma delas, a retite (ou proctite) act\u00ednica (ou r\u00e1dio induzida). Sua frequ\u00eancia (retite cr\u00f4nica) \u00e9 \u00b4estimada em cerca de 1 a 5% dos pacientes tratados com radioterapia para tumores p\u00e9lvicos. Acredita-se que essa incid\u00eancia era de cerca de 30% dos casos anteriormente.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Classifica\u00e7\u00e3o<\/h2>\n\n\n\n<p>Os efeitos da radia\u00e7\u00e3o sobre os reto podem ser divididas em agudas e cr\u00f4nicas:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Retite Aguda: <\/h3>\n\n\n\n<p>Ocorre em geral nos primeiros tr\u00eas meses ap\u00f3s o come\u00e7o da radioterapia.  Os sintomas mais comuns s\u00e3o c\u00f3licas abdominais, tenesmo, diarreia, descarga mucosa e sangramento leve. O exame endosc\u00f3pico em geral aponta mucosa avermelhada e com ulcera\u00e7\u00f5es. Bi\u00f3psias n\u00e3o s\u00e3o indicadas, devido ao risco de perfura\u00e7\u00e3o e fistuliza\u00e7\u00e3o. Apesar da alta incid\u00eancia (at\u00e9 50% dos casos), em geral \u00e9 autolimitada sendo as vezes necess\u00e1ria parada do tratamento.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Retite Cr\u00f4nica: <\/h3>\n\n\n\n<p>Ocorre ap\u00f3s o t\u00e9rmino do tratamento, com sintomas parecidos com o quando agudo, como tenesmo, urg\u00eancia, muco e sangramento de maior volume. A les\u00e3o cr\u00f4nica envolve altera\u00e7\u00f5es vasculares, levando a infarto transmural, altera\u00e7\u00e3o das arter\u00edolas locais e disfun\u00e7\u00e3o microvascular.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>&nbsp;A tabela 1 mostra a classifica\u00e7\u00e3o dos quadro de Retite act\u00ednica e necessidade de tratamento em cada grupo.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><div class=\"pcrstb-wrap\"><table><tbody><tr><td>PROCTITE<\/td><\/tr><tr><td>GRAU 1<\/td><td>Desconforto retal Sem indica\u00e7\u00e3o de interven\u00e7\u00e3o<\/td><\/tr><tr><td>GRAU 2<\/td><td>Sintom\u00e1tico (desconforto retal, sangramento ou muco) limitando atividade laboral Interven\u00e7\u00e3o m\u00e9dica indicada<\/td><\/tr><tr><td>GRAU 3<\/td><td>Sintomas intensos, urg\u00eancia ou incontin\u00eancia limitando o auto cuidado di\u00e1rio Interven\u00e7\u00e3o m\u00e9dica ou hospitaliza\u00e7\u00e3o indicadas<\/td><\/tr><tr><td>GRAU 4<\/td><td>Consequ\u00eancias com amea\u00e7a a vida Interna\u00e7\u00e3o urgente<\/td><\/tr><tr><td>GRAU 5<\/td><td>Morte<\/td><\/tr><\/tbody><\/table><\/div><figcaption>Common Terminology for Adverses Events Grading System for Proctitis According to NCIS<\/figcaption><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Diagn\u00f3stico<\/h2>\n\n\n\n<p>No quadros agudos, a hist\u00f3ria ou antecedente recente da radioterapia guiam o diagn\u00f3stico. O exame endosc\u00f3pico deve ser realizado com cuidado, devido ao grande risco de perfura\u00e7\u00e3o, e em geral mostra uma mucosa avermelhada, edemaciada e com ulcera\u00e7\u00f5es. Como dito, as bi\u00f3psias devem ser evitadas.<\/p>\n\n\n\n<p>No retite act\u00ednica cr\u00f4nica, a hist\u00f3ria deve mostrar o antecedente de radioterapia p\u00e9lvica, por\u00e9m, recidiva do tumor inicial e outras les\u00f5es tamb\u00e9m devem ser descartadas. Doen\u00e7as vasculares como diabetes melitus podem piorar o quadro. Ao exame endosc\u00f3pico, a mucosa retal se apresenta p\u00e1lida, com presen\u00e7a de teleangiectasias (figura 1), podendo haver estenose e sangramentos. Em casos raros, podem ocorrer m\u00faltiplas estenoses, dificultando o diagn\u00f3stico diferencial de neoplasia.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"720\" height=\"480\" src=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2022\/07\/PHOTO-2022-07-07-10-58-17.jpg\" alt=\"\" class=\"wp-image-12641\" srcset=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2022\/07\/PHOTO-2022-07-07-10-58-17.jpg?v=1657247094 720w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2022\/07\/PHOTO-2022-07-07-10-58-17-300x200.jpg?v=1657247094 300w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2022\/07\/PHOTO-2022-07-07-10-58-17-585x390.jpg?v=1657247094 585w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2022\/07\/PHOTO-2022-07-07-10-58-17-263x175.jpg?v=1657247094 263w\" sizes=\"(max-width: 720px) 100vw, 720px\" \/><figcaption>Figura 1 : Palidez da mucosa e telangiectasias<\/figcaption><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Tratamento<\/h2>\n\n\n\n<p>N\u00e3o existe at\u00e9 o momento estudos de grande impacto sobre o tratamento da retite act\u00ednica.<\/p>\n\n\n\n<p>Os casos agudos em geral s\u00e3o autolimitados , n\u00e3o aumento o risco para retite cr\u00f4nica e em cerca de 20% dos casos, uma pausa tempor\u00e1ria do tratamento leva a melhora do quadro.<\/p>\n\n\n\n<p>No casos cr\u00f4nicos v\u00e1rios tratamentos foram propostos ao longo dos anos. Os n\u00e3o invasivos envolvem o uso de medica\u00e7\u00f5es e enemas. Dentre estes, se destaca a aplica\u00e7\u00e3o retal de formalina (4 a 10%), que causa uma cauteriza\u00e7\u00e3o qu\u00edmica da mucosa, levando a melhora da maioria dos casos com apenas uma ou duas aplica\u00e7\u00f5es. Enemas de sucralfato demonstram uma resposta moderada, quando usada em casos de sangramentos. Oz\u00f4nio, enemas de lip\u00eddeos, metronidazol e mesalazina n\u00e3o apresentaram resultados satisfat\u00f3rios n\u00e3o sendo indicados.<\/p>\n\n\n\n<p>Os m\u00e9todos invasivos tem ganhado mais espa\u00e7o nos \u00faltimos anos, sendo o mais indicado a abla\u00e7\u00e3o com plasma de arg\u00f4nio. Em m\u00e9dia com duas sess\u00f5es (variando entre 1 e 5), \u00e9 poss\u00edvel atingir melhora em cerca de 80 a 100% dos casos de sangramento. Tamb\u00e9m pode-se usar para a mesma fun\u00e7\u00e3o Yag Laser, por\u00e9m, este e mais caro e menos dispon\u00edvel Outros m\u00e9todos ablativos ainda est\u00e3o em estudo , com radioabla\u00e7\u00e3o, crioterapia e heater probe.<\/p>\n\n\n\n<p>Por fim, o tratamento com c\u00e2mara hiperb\u00e1rica vem mostrando bons resultados, por\u00e9m sendo uma terapia mais cara, e mais demorada para o paciente. Cirurgia \u00e9 reservada para os casos graves, com amea\u00e7a a vida, ou complica\u00e7\u00f5es mais graves, como fistuliza\u00e7\u00f5es, perfura\u00e7\u00f5es e estenoses.<\/p>\n\n\n\n<p>Em resumo, alguns artigos orientam o tratamento conforme a gradua\u00e7\u00e3o do quadro (tabela 1). <\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Grau1 : Sem interven\u00e7\u00e3o<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Grau 2 e 3 : Agentes antiinflamat\u00f3rios. Mantendo-se sintomas, enemas de sucralfato ou Terapia Hiberb\u00e1rica.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Grau 4 : Agentes antiinflamat\u00f3rios, enemas de sucralfato ou Terapia Hiberb\u00e1rica. Mantendo-se sintomas, Formalina, coagula\u00e7\u00e3o com Plasma de Arg\u00f4nio ou Yag Laser.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Grau 5 : Cirurgia.<\/h4>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Bibliografia<\/h2>\n\n\n\n<p><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/34788934\/\">Dahiya DS, Kichloo A, Tuma F, Albosta M, Wani F. Radiation Proctitis and Management Strategies. Clin Endosc. 2022 Jan;55(1):22-32. doi: 10.5946\/ce.2020.288. Epub 2021 Nov 18. PMID: 34788934; PMCID: PMC8831406.<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/30192320\/\">Paquette IM, Vogel JD, Abbas MA, Feingold DL, Steele SR; Clinical Practice Guidelines Committee of The American Society of Colon and Rectal Surgeons. The American Society of Colon and Rectal Surgeons Clinical Practice Guidelines for the Treatment of Chronic Radiation Proctitis. Dis Colon Rectum. 2018 Oct;61(10):1135-1140. doi: 10.1097\/DCR.0000000000001209. PMID: 30192320.<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/31463226\/\">Porouhan P, Farshchian N, Dayani M. Management of radiation-induced proctitis. J Family Med Prim Care. 2019 Jul;8(7):2173-2178. doi: 10.4103\/jfmpc.jfmpc_333_19. PMID: 31463226; PMCID: PMC6691413.<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/27610010\/\">Weiner JP, Wong AT, Schwartz D, Martinez M, Aytaman A, Schreiber D. Endoscopic and non-endoscopic approaches for the management of radiation-induced rectal bleeding. World J Gastroenterol. 2016 Aug 21;22(31):6972-86. doi: 10.3748\/wjg.v22.i31.6972. PMID: 27610010; PMCID: PMC4988305.<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introdu\u00e7\u00e3o A Radioterapia hoje \u00e9 a base de muitos tratamentos m\u00e9dicos, principalmente em oncologia.&hellip;<\/p>\n","protected":false},"author":2221,"featured_media":12641,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[151],"tags":[438,436,437,432,434],"ano":[309],"tipo":[156],"volume":[263],"class_list":["post-12640","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-assuntosgerais","tag-actinica","tag-argonio","tag-formalina","tag-laser","tag-sangramento","ano-309","tipo-colonoscopia","volume-volume-i"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Assuntos gerais: Retite Act\u00ednica &#8226; Endoscopia Terapeutica<\/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:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/assuntos-gerais-retite-actinica\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Assuntos gerais: Retite Act\u00ednica\" \/>\n<meta property=\"og:description\" content=\"Introdu\u00e7\u00e3o A Radioterapia hoje \u00e9 a base de muitos tratamentos m\u00e9dicos, principalmente em oncologia. 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