{"id":12788,"date":"2025-07-31T10:47:38","date_gmt":"2025-07-31T14:47:38","guid":{"rendered":"https:\/\/www.rigicon.com\/glossary-term\/intravesical-therapy\/"},"modified":"2025-07-31T10:47:38","modified_gmt":"2025-07-31T14:47:38","slug":"terapia-intravesical-pt-br","status":"publish","type":"glossary-term","link":"https:\/\/www.rigicon.com\/pt-br\/glossary-term\/terapia-intravesical-pt-br\/","title":{"rendered":"Terapia Intravesical"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"","protected":false},"featured_media":0,"template":"","glossary-category":[126],"glossary-product":[],"class_list":["post-12788","glossary-term","type-glossary-term","status-publish","hentry","glossary-category-urological-conditions"],"acf":{"gt-definition":"A terapia intravesical \u00e9 uma abordagem de tratamento especializada na qual o medicamento \u00e9 administrado diretamente na bexiga atrav\u00e9s de um cateter inserido atrav\u00e9s da uretra, em vez de ser administrado sistemicamente por via oral ou intravenosa.<sup>1<\/sup> Este m\u00e9todo de administra\u00e7\u00e3o localizada permite que os agentes terap\u00eauticos entrem em contato direto com o revestimento da bexiga, minimizando a exposi\u00e7\u00e3o sist\u00eamica e os efeitos colaterais associados.<sup>2<\/sup> O objetivo principal da terapia intravesical \u00e9 erradicar tumores existentes ou residuais por meio de citoabla\u00e7\u00e3o direta ou imunoestimula\u00e7\u00e3o.<sup>3<\/sup> Durante o procedimento, o medicamento \u00e9 instilado na forma de l\u00edquido e retido na bexiga por um per\u00edodo espec\u00edfico, normalmente de 1 a 2 horas, antes de ser expelido pela mic\u00e7\u00e3o.<sup>4<\/sup> Esta modalidade de tratamento \u00e9 usada predominantemente para c\u00e2ncer de bexiga n\u00e3o invasivo muscular (NMIBC) e carcinoma in situ (CIS), onde serve como terapia adjuvante ap\u00f3s ressec\u00e7\u00e3o transuretral de tumor de bexiga (TURBT) para reduzir as taxas de recorr\u00eancia e progress\u00e3o.<sup>1,3<\/sup>\n<p>A terapia intravesical \u00e9 a administra\u00e7\u00e3o direta de agentes terap\u00eauticos na bexiga atrav\u00e9s de cateter uretral. Na oncologia vesical, os principais agentes s\u00e3o BCG (bacilo de Calmette-Gu\u00e9rin) e mitomicina C para c\u00e2ncer de bexiga n\u00e3o m\u00fasculo-invasivo (NMIBC). Na cistite intersticial, incluem \u00e1cido hialur\u00f4nico, DMSO, heparina e lidoca\u00edna. A via intravesical maximiza a concentra\u00e7\u00e3o local com m\u00ednima toxicidade sist\u00eamica.<\/p>","gt-synonyms":"Administra\u00e7\u00e3o intravesical, instila\u00e7\u00e3o intravesical, tratamento intravesical, quimioterapia intravesical (quando s\u00e3o usados \u200b\u200bagentes quimioter\u00e1picos), imunoterapia intravesical (quando s\u00e3o usados \u200b\u200bagentes imunoter\u00e1picos), terapia intravesical com BCG (espec\u00edfica para tratamento com Bacillus Calmette-Gu\u00e9rin)","gt-citation":"[1] Shen Z, Shen T, Wientjes MG, O'Donnell MA, Au JL. Intravesical Treatments of Bladder Cancer: Review. Pharm Res. 2008 Mar;25(7):1500-1510. DOI: 10.1007\/s11095-008-9566-7\n\n[2] American Cancer Society. Intravesical Therapy for Bladder Cancer. Updated April 17, 2025. https:\/\/www.cancer.org\/cancer\/types\/bladder-cancer\/treating\/intravesical-therapy.html\n\n[3] Bladder Cancer Advocacy Network (BCAN). Intravesical Therapy. Updated December 5, 2024. https:\/\/bcan.org\/intravesical-therapy\/\n\n[4] Memorial Sloan Kettering Cancer Center. About Intravesical Therapy. https:\/\/www.mskcc.org\/cancer-care\/patient-education\/about-intravesical-therapy\n\n[5] National Cancer Institute. Definition of intravesical chemotherapy. https:\/\/www.cancer.gov\/publications\/dictionaries\/cancer-terms\/def\/intravesical-chemotherapy","gt-clinical-context":"A terapia intravesical \u00e9 utilizada principalmente no tratamento do c\u00e2ncer de bexiga n\u00e3o invasivo muscular (NMIBC), que inclui c\u00e2ncer de bexiga em est\u00e1gio 0 (carcinoma in situ) e est\u00e1gio I que n\u00e3o penetrou na camada muscular da parede da bexiga.<sup>1<\/sup> Esta modalidade de tratamento \u00e9 mais comumente empregada nos seguintes cen\u00e1rios cl\u00ednicos:\n \n <p>Como terapia adjuvante ap\u00f3s a ressec\u00e7\u00e3o transuretral de tumor de bexiga (RTU), a terapia intravesical reduz significativamente o risco de recorr\u00eancia do tumor, que afeta at\u00e9 70% dos pacientes com NMIBC dentro de cinco anos do tratamento inicial.<sup>3<\/sup> Uma dose \u00fanica de quimioterapia intravesical \u00e9 frequentemente administrada dentro de 24 horas ap\u00f3s a RTU, seguida por um esquema de manuten\u00e7\u00e3o baseado no risco do paciente estratifica\u00e7\u00e3o.<sup>1<\/sup><\/p>\n \n <p>Para NMIBC de risco intermedi\u00e1rio e alto, a terapia intravesical normalmente segue um cronograma de tratamentos semanais por aproximadamente 6 semanas (fase de indu\u00e7\u00e3o), seguido por tratamentos de manuten\u00e7\u00e3o menos frequentes que se estendem de 1 ano para risco intermedi\u00e1rio a at\u00e9 3 anos para c\u00e2nceres de alto risco.<sup>1,2<\/sup> Este regime demonstrou reduzir as taxas de recorr\u00eancia em 14-17% em compara\u00e7\u00e3o com TURBT sozinho.<sup>3<\/sup><\/p>\n \n <p>A terapia intravesical \u00e9 particularmente valiosa para o tratamento do carcinoma in situ (CIS), um c\u00e2ncer plano e de alto grau que \u00e9 dif\u00edcil de remover completamente apenas com cirurgia.<sup>2<\/sup> A aplica\u00e7\u00e3o direta de medica\u00e7\u00e3o no revestimento da bexiga permite o tratamento direcionado dessas les\u00f5es superficiais, mas agressivas.<\/p>\n \n <p>Duas categorias principais de agentes terap\u00eauticos intravesicais s\u00e3o empregadas:<\/p>\n \n <p>Os agentes de imunoterapia estimulam o sistema imunol\u00f3gico do corpo a atingir e destruir as c\u00e9lulas cancer\u00edgenas. Bacillus Calmette-Gu\u00e9rin (BCG) continua sendo o agente imunoterap\u00eautico de primeira linha padr\u00e3o ouro para NMIBC e CIS de alto risco, demonstrando efic\u00e1cia superior na preven\u00e7\u00e3o de recorr\u00eancia em compara\u00e7\u00e3o com v\u00e1rios agentes quimioter\u00e1picos.<sup>3<\/sup> Para doen\u00e7as que n\u00e3o respondem ao BCG, as op\u00e7\u00f5es mais recentes aprovadas pela FDA incluem Nadofaragene firadenovec (Adstiladrin), uma terapia gen\u00e9tica que introduz interferon alfa-2b em ativam c\u00e9lulas imunol\u00f3gicas e Nogapendekin alfa inbakicept (Anktiva), que aumenta a resposta imunol\u00f3gica ativando a interleucina-15.<sup>2,3<\/sup><\/p>\n \n <p>Os agentes quimioter\u00e1picos matam diretamente as c\u00e9lulas cancer\u00edgenas que se dividem rapidamente. Os quimioter\u00e1picos intravesicais comumente usados incluem Mitomicina C, Gemcitabina, Docetaxel, Valrubicina, Epirrubicina e Tiotepa.<sup>1,2<\/sup> Esses agentes s\u00e3o particularmente valiosos para pacientes que n\u00e3o s\u00e3o eleg\u00edveis ou n\u00e3o respondem \u00e0 terapia com BCG.<\/p>\n \n <p>A sele\u00e7\u00e3o de pacientes para terapia intravesical \u00e9 baseada na estratifica\u00e7\u00e3o de risco, com fatores incluindo grau do tumor, est\u00e1gio, tamanho, multiplicidade e hist\u00f3rico de recorr\u00eancia anterior determinando o agente apropriado e o esquema de tratamento.<sup>4<\/sup> O tratamento \u00e9 administrado atrav\u00e9s de um cateter inserido na bexiga atrav\u00e9s da uretra, com o medicamento retido por um per\u00edodo especificado antes de ser expelido pela mic\u00e7\u00e3o.<sup>4<\/sup><\/p>\n \n <p>Os efeitos colaterais s\u00e3o geralmente localizados na bexiga e incluem sintomas irritativos de mic\u00e7\u00e3o, hemat\u00faria leve e espasmos na bexiga.<sup>2<\/sup> Os efeitos colaterais sist\u00eamicos s\u00e3o m\u00ednimos devido \u00e0 absor\u00e7\u00e3o limitada atrav\u00e9s do urot\u00e9lio, que \u00e9 uma das principais vantagens desta abordagem de tratamento.<sup>1,2<\/sup><\/p>\n<p>A EAU 2023 recomenda BCG intravesical de indu\u00e7\u00e3o + manuten\u00e7\u00e3o como padr\u00e3o para NMIBC de alto risco, com redu\u00e7\u00e3o de progress\u00e3o em 27%. Mitomicina C \u00e9 alternativa para risco intermedi\u00e1rio. O protocolo inclui 6 instila\u00e7\u00f5es semanais de indu\u00e7\u00e3o e manuten\u00e7\u00e3o mensal por 1-3 anos. Para cistite intersticial, instila\u00e7\u00f5es semanais de \u00e1cido hialur\u00f4nico por 4-12 semanas s\u00e3o uma op\u00e7\u00e3o de segunda linha. A ader\u00eancia ao esquema \u00e9 fundamental para os resultados.<\/p>","gt-related-evidence":null,"gt-featured":true,"gt-ai-referenced":false,"gt-view-count":68},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.7 (Yoast SEO v27.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Terapia Intravesical: Tratamento Local na Bexiga | Rigicon<\/title>\n<meta name=\"description\" content=\"Conhe\u00e7a a terapia intravesical: instila\u00e7\u00e3o de BCG, mitomicina C e outros agentes na bexiga. Indica\u00e7\u00f5es em c\u00e2ncer e cistite intersticial. 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