{"id":12130,"date":"2025-07-24T10:34:23","date_gmt":"2025-07-24T14:34:23","guid":{"rendered":"https:\/\/www.rigicon.com\/glossary-term\/external-beam-radiation-therapy\/"},"modified":"2025-07-24T10:34:23","modified_gmt":"2025-07-24T14:34:23","slug":"radioterapia-de-haz-externo","status":"publish","type":"glossary-term","link":"https:\/\/www.rigicon.com\/es\/glossary-term\/radioterapia-de-haz-externo\/","title":{"rendered":"Radioterapia de Haz Externo"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"","protected":false},"featured_media":0,"template":"","glossary-category":[126],"glossary-product":[],"class_list":["post-12130","glossary-term","type-glossary-term","status-publish","hentry","glossary-category-urological-conditions"],"acf":{"gt-definition":"La radioterapia de haz externo (EBRT) es una forma de tratamiento de radiaci\u00f3n que dirige rayos de alta energ\u00eda desde el exterior del cuerpo hacia el tejido canceroso. Utiliza una m\u00e1quina llamada acelerador lineal (o hist\u00f3ricamente una fuente de cobalto-60) para administrar rayos de radiaci\u00f3n dirigidos con precisi\u00f3n a los tumores y al mismo tiempo minimizar la exposici\u00f3n a los tejidos sanos circundantes.<sup>1<\/sup> <sup>2<\/sup> La EBRT induce da\u00f1o en el ADN, detenci\u00f3n del ciclo celular, da\u00f1o citogen\u00e9tico, apoptosis y senescencia en las c\u00e9lulas cancerosas, bloqueando as\u00ed su capacidad de proliferar a\u00fan m\u00e1s y, en \u00faltima instancia, causando muerte.<sup>3<\/sup> Los rayos de radiaci\u00f3n son invisibles y no se pueden sentir cuando pasan a trav\u00e9s de la piel para llegar al c\u00e1ncer.<sup>4<\/sup> Esta modalidad de tratamiento generalmente se administra durante visitas ambulatorias a un hospital o centro de tratamiento durante varias semanas, y los pacientes generalmente reciben tratamiento cinco d\u00edas a la semana (de lunes a viernes).<sup>5<\/sup>","gt-synonyms":"EBRT, radioterapia externa, teleterapia, tratamiento de radiaci\u00f3n, radiaci\u00f3n externa, XRT","gt-citation":"[1] Koka K, Verma A, Dwarakanath BS, Papineni RVL. Technological Advancements in External Beam Radiation Therapy (EBRT): An Indispensable Tool for Cancer Treatment. Cancer Manag Res. 2022 Apr 11;14:1421-1429. DOI: https:\/\/doi.org\/10.2147\/CMAR.S351744\n\n[2] Abbott EM, Falzone N, Lenzo N, Vallis KA. Combining External Beam Radiation and Radionuclide Therapies: Rationale, Radiobiology, Results and Roadblocks. Clin Oncol (R Coll Radiol). 2021 Nov;33(11):735-743. DOI: https:\/\/doi.org\/10.1016\/j.clon.2021.09.004\n\n[3] Yorke E, Gelblum D, Ford E. Patient Safety in External Beam Radiation Therapy. AJR Am J Roentgenol. 2011 Apr;196(4):768-72. DOI: https:\/\/doi.org\/10.2214\/AJR.10.6006\n\n[4] National Cancer Institute. Definition of external beam radiation therapy. NCI Dictionary of Cancer Terms. Accessed June 2, 2025. https:\/\/www.cancer.gov\/publications\/dictionaries\/cancer-terms\/def\/external-beam-radiation-therapy\n\n[5] American Cancer Society. Getting External Beam Radiation Therapy. Actualizado February 13, 2023. Accessed June 2, 2025. https:\/\/www.cancer.org\/cancer\/managing-cancer\/treatment-types\/radiation\/external-beam-radiation-therapy.html","gt-clinical-context":"La radioterapia de haz externo se usa para tratar muchos tipos de c\u00e1ncer, ya sea como tratamiento primario o en combinaci\u00f3n con otras modalidades como cirug\u00eda, quimioterapia e inmunoterapia.<sup>1<\/sup> <sup>2<\/sup> Es particularmente eficaz para tratar tumores localizados y puede usarse con intenci\u00f3n curativa o con fines paliativos para aliviar los s\u00edntomas en pacientes avanzados. enfermedad.<sup>3<\/sup><p>La selecci\u00f3n del paciente para EBRT depende de varios factores, incluidos el tipo de c\u00e1ncer, el estadio, la ubicaci\u00f3n, la salud general del paciente y los objetivos del tratamiento.<sup>4<\/sup> El proceso de planificaci\u00f3n del tratamiento implica t\u00e9cnicas de imagen sofisticadas como la tomograf\u00eda computarizada (CT), la tomograf\u00eda por emisi\u00f3n de positrones (PET) y la resonancia magn\u00e9tica (MRI) para mapear con precisi\u00f3n el tumor y los tejidos circundantes.<sup>1<\/sup> <sup>5<\/sup><\/p><p>Varios avances tecnol\u00f3gicos han aumentado la eficacia de la EBRT, entre ellos:<\/p><ul><li>Radioterapia conformada tridimensional (3DCRT): Utiliza im\u00e1genes tridimensionales para hacer coincidir los haces de radiaci\u00f3n con la forma del tumor, lo que reduce el da\u00f1o a los tejidos normales.<sup>1<\/sup> <sup>5<\/sup><\/li><li>Radioterapia de intensidad modulada (IMRT): refina a\u00fan m\u00e1s 3DCRT al cambiar la fuerza (intensidad) de algunos haces en ciertas \u00e1reas, lo que permite una mayor potencia dosis para apuntar a partes espec\u00edficas del tumor y al mismo tiempo disminuir el da\u00f1o a los tejidos cercanos.<sup>1<\/sup> <sup>5<\/sup><\/li><li>Radioterapia guiada por im\u00e1genes (IGRT): utiliza exploraciones por im\u00e1genes antes de cada sesi\u00f3n de tratamiento para ajustar la posici\u00f3n del paciente o el objetivo de los haces de radiaci\u00f3n seg\u00fan sea necesario, asegurando una precisi\u00f3n focalizaci\u00f3n.<sup>1<\/sup> <sup>5<\/sup><\/li><li>Radiocirug\u00eda estereot\u00e1ctica (SRS) y radioterapia corporal estereot\u00e1ctica (SBRT): administra grandes dosis de radiaci\u00f3n a \u00e1reas peque\u00f1as de tumores con extrema precisi\u00f3n, a menudo en menos sesiones.<sup>1<\/sup> <sup>5<\/sup><\/li><li>Terapia de part\u00edculas: utiliza protones u otras part\u00edculas en lugar de fotones, lo que permite una deposici\u00f3n de energ\u00eda m\u00e1s precisa en el sitio del tumor con menos da\u00f1o a los tejidos circundantes.<sup>1<\/sup> <sup>3<\/sup><\/li><\/ul><p>Los resultados esperados var\u00edan seg\u00fan el tipo de c\u00e1ncer, el estadio y la intenci\u00f3n del tratamiento, pero la EBRT ha demostrado una eficacia significativa en el control local de tumores y ha mejorado las tasas de supervivencia para muchos tipos de c\u00e1ncer.<sup>2<\/sup> <sup>3<\/sup> Los efectos secundarios pueden incluir fatiga y reacciones cut\u00e1neas en el sitio de tratamiento y efectos espec\u00edficos relacionados con el \u00e1rea que se est\u00e1 tratando, aunque las t\u00e9cnicas modernas apuntan a minimizar estos efectos adversos.<sup>4<\/sup> <sup>5<\/sup><\/p>","gt-related-evidence":null,"gt-featured":true,"gt-ai-referenced":false,"gt-view-count":90},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.7 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Radioterapia de Haz Externo: Precision Cancer Treatment<\/title>\n<meta name=\"description\" content=\"La radioterapia de haz externo (EBRT) utiliza rayos de alta energ\u00eda provenientes del exterior del cuerpo para atacar y destruir con precisi\u00f3n las...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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