{"id":19622,"date":"2026-05-21T21:15:47","date_gmt":"2026-05-21T21:15:47","guid":{"rendered":"https:\/\/endoscopiaterapeutica.net\/es\/?p=19622"},"modified":"2026-05-21T21:15:58","modified_gmt":"2026-05-21T21:15:58","slug":"reseque-una-lesion-colorrectal-y-ahora","status":"publish","type":"post","link":"https:\/\/endoscopiaterapeutica.net\/es\/temas-generales\/reseque-una-lesion-colorrectal-y-ahora\/","title":{"rendered":"\u00bfResequ\u00e9 una lesi\u00f3n colorrectal&#8230; y ahora?"},"content":{"rendered":"\n<p>Tras la retirada de una lesi\u00f3n colorrectal, llega el momento m\u00e1s cr\u00edtico en la toma de decisiones:<\/p>\n\n\n\n<p><strong>\u00bfFue curativa\u2026 o a\u00fan no hemos terminado el tratamiento?<br><br><\/strong>La respuesta a esta pregunta depende de varios factores.Y es precisamente aqu\u00ed donde surgen las mayores dudas en la pr\u00e1ctica cl\u00ednica.En este texto, abordaremos de forma directa y objetiva los puntos clave que debe evaluar para determinar si su resecci\u00f3n fue realmente curativa.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-que-define-un-margen-vertical-negativo\"><br><strong>\u00bfQu\u00e9 define un margen vertical negativo?<\/strong><\/h2>\n\n\n\n<p>Seg\u00fan la gu\u00eda ESGE 2022\u00b9:<\/p>\n\n\n\n<p><strong><br>Idealmente, \u2265 1 mm de margen libre.<br><br><\/strong>Pero tenga en cuenta:<br>\u2022 No existe suficiente evidencia en la literatura para determinar que un margen con una extensi\u00f3n &lt; 1 mm sea positivo, pero los m\u00e1rgenes menores a este tama\u00f1o pueden aumentar el riesgo de recurrencia local.\u2022 Si la distancia entre la lesi\u00f3n y el margen vertical es menor a 1 mm pero est\u00e1 libre de tumor, esto no implica un cambio en el tratamiento; solo se recomienda un seguimiento m\u00e1s riguroso.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-la-reseccion-en-bloque-con-margenes-negativos-r0-equivale-a-la-curacion\"><br><strong>\u00bfLa resecci\u00f3n en bloque con m\u00e1rgenes negativos (R0) equivale a la curaci\u00f3n?<\/strong><\/h2>\n\n\n\n<p>\u00a1NO necesariamente!Tener m\u00e1rgenes libres de tumor (R0) es fundamental, pero no suficiente. Deben evaluarse otros criterios en conjunto. La decisi\u00f3n final depende de un an\u00e1lisis histopatol\u00f3gico m\u00e1s exhaustivo, que estimar\u00e1 el riesgo de met\u00e1stasis ganglionar.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-si-no-basta-con-tener-margenes-r0-que-mas-importa\"><br><strong>Si no basta con tener m\u00e1rgenes R0&#8230; \u00bfqu\u00e9 m\u00e1s importa?<\/strong><\/h2>\n\n\n\n<p>Seg\u00fan las gu\u00edas japonesas (JSCCR)\u00b2, la resecci\u00f3n solo se considera curativa cuando se cumplen TODOS los siguientes criterios:<\/p>\n\n\n\n<p>\u2022 M\u00e1rgenes libres de tumor<br>\u2022 Adenocarcinoma bien o moderadamente diferenciado (tubular o papilar)<br>\u2022 Invasi\u00f3n submucosa &lt; 1000 \u03bcm (T1a)<br>\u2022 Ausencia de invasi\u00f3n linf\u00e1tica o vascular<br>\u2022 <em>Tumor budding<\/em> bajo (BD1): 0-4 buds<br><br>Si se cumplen todos estos criterios:<br><br><strong>El riesgo de met\u00e1stasis linfonodal es muy bajo \u2192 no se requiere tratamiento adicional.<br><br><\/strong>La gu\u00eda de la ESGE\u00b9 propone un enfoque basado en la estratificaci\u00f3n del riesgo:<strong><br><br>Riesgo muy bajo (&lt; 0,5 %)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Resecci\u00f3n en bloque R0<\/li>\n\n\n\n<li>Displasia o lesi\u00f3n pT1a (submucosa superficial)<\/li>\n\n\n\n<li>Diferenciado<\/li>\n\n\n\n<li>Sin invasi\u00f3n linfovascular<\/li>\n<\/ul>\n\n\n\n<p><br><strong>Riesgo bajo (&lt; 2 %)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Resecci\u00f3n en bloque R0<\/li>\n\n\n\n<li>T1b superficial (Sm1)<\/li>\n\n\n\n<li>Diferenciado<\/li>\n\n\n\n<li>Sin invasi\u00f3n linfovascular<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-tumor-budding-que-es-y-por-que-es-tan-importante\"><br><strong><em>Tumor budding<\/em>&#8230; \u00bfqu\u00e9 es y por qu\u00e9 es tan importante?<\/strong><\/h2>\n\n\n\n<p>El <em>tumor budding<\/em> (brotaci\u00f3n tumoral) corresponde a c\u00e9lulas tumorales aisladas o peque\u00f1os grupos (de hasta 4 c\u00e9lulas) ubicados en el frente de invasi\u00f3n del tumor<sup>4<\/sup>.<\/p>\n\n\n\n<p>En otras palabras: <strong>es un marcador de agresividad tumoral.<\/strong><\/p>\n\n\n\n<p>Y precisamente por eso es tan importante: <strong>identifica tumores biol\u00f3gicamente m\u00e1s agresivos, incluso cuando otros criterios parecen favorables.<\/strong><\/p>\n\n\n\n<p>En la pr\u00e1ctica:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>BD1 \u2192 bajo riesgo<\/li>\n\n\n\n<li>BD2\/BD3 \u2192 mayor riesgo de met\u00e1stasis \u2192 considerar tratamiento adicional<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-la-profundidad-de-la-invasion-submucosa-sigue-siendo-un-criterio-absoluto-y-aislado\"><br><strong>\u00bfLa profundidad de la invasi\u00f3n submucosa sigue siendo un criterio absoluto y aislado?<\/strong><\/h2>\n\n\n\n<p>Cada vez menos.Evidencia reciente muestra que:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Una invasi\u00f3n \u2265 1000 \u03bcm por s\u00ed sola puede sobreestimar el riesgo.<\/li>\n\n\n\n<li>Cuando est\u00e1 aislada, el riesgo de met\u00e1stasis en los ganglios linf\u00e1ticos es bajo.<\/li>\n\n\n\n<li>No se mantiene como un factor independiente en los an\u00e1lisis ajustados.<\/li>\n<\/ul>\n\n\n\n<p><br>Un metaan\u00e1lisis publicado por Zwager y colaboradores<sup>3<\/sup> que incluy\u00f3 67 estudios con m\u00e1s de 21\u00a0000 pacientes, mostr\u00f3 que:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>La tasa global de met\u00e1stasis ganglionar en el c\u00e1ncer colorrectal T1 fue del 11,2 %.<\/li>\n\n\n\n<li>Si bien la invasi\u00f3n submucosa profunda se asocia con un mayor riesgo en el an\u00e1lisis univariado, no result\u00f3 ser un factor independiente significativo al ajustarse por otros factores histol\u00f3gicos.<\/li>\n\n\n\n<li>Cuando se presenta como \u00fanico factor de riesgo, la tasa absoluta de met\u00e1stasis ganglionar fue de aproximadamente el 2,6 %.<\/li>\n<\/ul>\n\n\n\n<p>En otras palabras: <strong>No debemos tomar decisiones bas\u00e1ndonos en un solo criterio.<\/strong>Este enfoque m\u00e1s individualizado ha ganado terreno en el manejo actual del c\u00e1ncer colorrectal en estadio temprano.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-pero-entonces-cuando-debo-indicar-un-tratamiento-adicional-despues-de-la-reseccion-endoscopica\"><br><strong>Pero entonces&#8230; \u00bfcu\u00e1ndo debo indicar un tratamiento adicional despu\u00e9s de la resecci\u00f3n endosc\u00f3pica?<\/strong><\/h2>\n\n\n\n<p><br>Los principales signos de alerta son:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Margen vertical positivo<\/li>\n\n\n\n<li>Invasi\u00f3n submucosa \u2265 1000 \u03bcm (T1b)<\/li>\n\n\n\n<li>Invasi\u00f3n linf\u00e1tica o vascular<\/li>\n\n\n\n<li>Histolog\u00eda desfavorable:\n<ul class=\"wp-block-list\">\n<li>Mal diferenciado<\/li>\n\n\n\n<li>Mucinoso<\/li>\n\n\n\n<li>C\u00e9lulas en anillo de sello<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Alta gemaci\u00f3n tumoral (BD2 o BD3)<\/li>\n<\/ul>\n\n\n\n<p>La presencia de cualquiera de estos factores aumenta la probabilidad de diseminaci\u00f3n ganglionar y, por lo tanto, puede justificar un tratamiento quir\u00fargico adicional.<br><br>Sin embargo, la decisi\u00f3n final no debe basarse \u00fanicamente en la histolog\u00eda. Las gu\u00edas cl\u00ednicas enfatizan que tambi\u00e9n deben considerarse factores del paciente, como la edad, las comorbilidades, el estado funcional y el posible impacto de la cirug\u00eda en la calidad de vida.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-mensaje-final\"><br><strong>Mensaje final<\/strong><\/h2>\n\n\n\n<p>La definici\u00f3n de resecci\u00f3n endosc\u00f3pica curativa en el c\u00e1ncer colorrectal en estadio temprano debe basarse en una evaluaci\u00f3n integral de los factores de riesgo histopatol\u00f3gicos de met\u00e1stasis ganglionar y los factores relacionados con el paciente.<br><br>Si bien los m\u00e1rgenes negativos y la profundidad de la invasi\u00f3n submucosa son fundamentales, no deben interpretarse de forma aislada.<br><br>Una estratificaci\u00f3n de riesgo adecuada requiere el an\u00e1lisis conjunto de m\u00faltiples par\u00e1metros, entre ellos:<br><br>\u2022 grado de diferenciaci\u00f3n tumoral<br>\u2022 presencia de invasi\u00f3n linfovascular<br>\u2022 <em>tumor budding<\/em><br>\u2022 patr\u00f3n de resecci\u00f3n (en bloque o fragmentada)<br><br>Este enfoque multidimensional permite una estimaci\u00f3n m\u00e1s precisa del riesgo oncol\u00f3gico y gu\u00eda con mayor seguridad la decisi\u00f3n entre el seguimiento endosc\u00f3pico y el tratamiento quir\u00fargico adicional.<br><br>Por lo tanto, el manejo debe ser individualizado, considerando no solo los hallazgos histol\u00f3gicos, sino tambi\u00e9n las caracter\u00edsticas cl\u00ednicas del paciente y el impacto potencial de las diferentes estrategias terap\u00e9uticas.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-referencias\"><strong>Referencias<\/strong><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Endoscopic submucosal dissection for superficial gastrointestinal lesions: European Society of Gastrointestinal Endoscopy (ESGE) Guideline \u2013 Update 2022. Endoscopy, 2022. Pimentel-Nunes Pedro et al.<\/li>\n\n\n\n<li>Japanese Society for Cancer of the Colon and Rectum (JSCCR) guidelines 2024 for the treatment of colorectal cancer. Int J Clin Oncology, 2025. Yusuke Kinugasa et al. <\/li>\n\n\n\n<li>Deep Submucosal Invasion Is Not an Independent Risk Factor for Lymph Node Metastasis in T1 Colorectal Cancer: A Meta-Analysis. Gastroenterology, 2022. Liselotte W Zwager et al.<\/li>\n\n\n\n<li><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/32601463\" target=\"_blank\" rel=\"noreferrer noopener\">Tumour Budding and Its Clinical Implications in Gastrointestinal Cancers.<\/a> British Journal of Cancer. 2020.\u00a0Zlobec I, Berger MD, Lugli A.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-como-citar-este-articulo\"><strong>Como citar este articulo<\/strong><\/h2>\n\n\n\n<p class=\"has-very-light-gray-to-cyan-bluish-gray-gradient-background has-background\">Nobre R, Chinem ESS, Penaloza CSQ. \u00bfResequ\u00e9 una lesi\u00f3n colorrectal&#8230; y ahora? Endoscopia Terapeutica 2026, Vol I. Disponible en: <a href=\"https:\/\/endoscopiaterapeutica.net\/es\/?p=19622\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/endoscopiaterapeutica.net\/es\/temas-generales\/reseque-una-lesion-colorrectal-y-ahora\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tras la retirada de una lesi\u00f3n colorrectal, llega el momento m\u00e1s cr\u00edtico en la&hellip;<\/p>\n","protected":false},"author":3872,"featured_media":19601,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[151],"tags":[],"ano":[751],"tipo":[156],"volume":[263],"class_list":["post-19622","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-temas-generales","ano-751","tipo-colonoscopia","volume-volumen-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>\u00bfResequ\u00e9 una lesi\u00f3n colorrectal... y ahora? 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