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	<title>PD-L1 &#8211; Grupo TTD</title>
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	<description>Grupo de Tratamiento de los Tumores Digestivos</description>
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		<title>Claudina 18.2 en adenocarcinoma gastroesofágico: prevalencia, solapamiento biomarcador e impacto clínico en cohorte europea</title>
		<link>https://grupottd.org/claudina-18-2-en-adenocarcinoma-gastroesofagico-prevalencia-solapamiento-biomarcador-e-impacto-clinico-en-cohorte-europea/</link>
					<comments>https://grupottd.org/claudina-18-2-en-adenocarcinoma-gastroesofagico-prevalencia-solapamiento-biomarcador-e-impacto-clinico-en-cohorte-europea/#respond</comments>
		
		<dc:creator><![CDATA[Susana Rodríguez]]></dc:creator>
		<pubDate>Mon, 01 Jun 2026 06:31:38 +0000</pubDate>
				<category><![CDATA[Artículos comentados]]></category>
		<category><![CDATA[Adenocarcinoma gastroesofágico]]></category>
		<category><![CDATA[Biomarcadores]]></category>
		<category><![CDATA[Cáncer de la unión gastroesofágica]]></category>
		<category><![CDATA[Cáncer gástrico]]></category>
		<category><![CDATA[Claudina 18.2]]></category>
		<category><![CDATA[CLDN18.2]]></category>
		<category><![CDATA[ESMO Open]]></category>
		<category><![CDATA[Estudio multicéntrico europeo]]></category>
		<category><![CDATA[HER2 positivo]]></category>
		<category><![CDATA[inmunoterapia]]></category>
		<category><![CDATA[PD-L1]]></category>
		<category><![CDATA[zolbetuximab]]></category>
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					<description><![CDATA[El estudio de Terán et al. analiza la expresión de CLDN18.2 en 563 pacientes europeos con adenocarcinoma gastroesofágico avanzado. La expresión alta de CLDN18.2 (≥75% de células tumorales) se detectó en el 48,3% de los casos, una prevalencia superior a la de los ensayos pivotales. La expresión se asoció con histología difusa y afectación peritoneal, y se solapó con otros biomarcadores en más del 20% de los pacientes. Mientras que CLDN18.2 no modificó los resultados con quimioterapia sola, sí se asoció con mejor respuesta a la terapia anti-HER2 y con una tendencia a peores resultados con inmunoterapia.

Conclusiones:
-	La expresión alta de CLDN18.2 es más prevalente en Europa (48,3%) que en las series asiáticas y los ensayos pivotales (~24-38%).
-	Se asocia con histología difusa, células en anillo de sello y afectación peritoneal.
-	No tiene impacto en los resultados de supervivencia con quimioterapia de primera línea.
-	En los tumores HER2 positivos, aquellos con expresión alta de CLDN18.2 se asociaron con mejor mSLP con terapia anti-HER2 (17 vs 8,9 meses; P = 0,03).
-	Los pacientes con tumores expresión alta de CLDN18.2 tratados con inmunoterapia mostraron tendencia a peores resultados que los pacientes con tumores con baja expresión (mSG 16 vs 43 meses; P = 0,052).
-	Los datos apoyan la necesidad de estrategias terapéuticas guiadas por biomarcadores en GEA avanzado.

]]></description>
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					<p class="elementor-heading-title elementor-size-default">01 de junio de 2026</p>				</div>
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					<p class="elementor-heading-title elementor-size-default">Terán E, Pazo R, Caritá L, Alsina M, Hierro C, Blanco C, Reboredo M, Landolfi S, Zucchiatti A, Visa L, Calvo A, López A, Vidal-Tocino R, Agra C, Alés I, Foti S, García-Paredes B, Genovesi V, Fornaro L, Sauri T, Macías I, Martínez E, Martínez J, Buges C, Ribera P, Herranz JM, Acosta D, Vivancos A, Tabernero J, Élez E, Tian TV, Macarulla T.</p>				</div>
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					<h4 class="elementor-heading-title elementor-size-default">Autora de la revisión:</h4>				</div>
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					<p class="elementor-heading-title elementor-size-default">María Nieva Muñoz, Hospital de la Santa Creu i Sant Pau. Barcelona (Miembro de la Asamblea General del Grupo TTD)</p>				</div>
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									<p>El estudio de Terán et al. analiza la expresión de CLDN18.2 en 563 pacientes europeos con adenocarcinoma gastroesofágico avanzado. La expresión alta de CLDN18.2 (≥75% de células tumorales) se detectó en el 48,3% de los casos, una prevalencia superior a la de los ensayos pivotales. La expresión se asoció con histología difusa y afectación peritoneal, y se solapó con otros biomarcadores en más del 20% de los pacientes. Mientras que CLDN18.2 no modificó los resultados con quimioterapia sola, sí se asoció con mejor respuesta a la terapia anti-HER2 y con una tendencia a peores resultados con inmunoterapia.</p><p><strong>Conclusiones:</strong></p><ul><li>La expresión alta de CLDN18.2 es más prevalente en Europa (48,3%) que en las series asiáticas y los ensayos pivotales (~24-38%).</li><li>Se asocia con histología difusa, células en anillo de sello y afectación peritoneal.</li><li>No tiene impacto en los resultados de supervivencia con quimioterapia de primera línea.</li><li>En los tumores HER2 positivos, aquellos con expresión alta de CLDN18.2 se asociaron con mejor mSLP con terapia anti-HER2 (17 vs 8,9 meses; P = 0,03).</li><li>Los pacientes con tumores expresión alta de CLDN18.2 tratados con inmunoterapia mostraron tendencia a peores resultados que los pacientes con tumores con baja expresión (mSG 16 vs 43 meses; P = 0,052).</li><li>Los datos apoyan la necesidad de estrategias terapéuticas guiadas por biomarcadores en GEA avanzado.</li></ul>								</div>
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					<wfw:commentRss>https://grupottd.org/claudina-18-2-en-adenocarcinoma-gastroesofagico-prevalencia-solapamiento-biomarcador-e-impacto-clinico-en-cohorte-europea/feed/</wfw:commentRss>
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		<title>HERIZON-GEA-01 (fase Ib/II zanidatamab)</title>
		<link>https://grupottd.org/herizon-gea-01-fase-ib-ii-zanidatamab/</link>
					<comments>https://grupottd.org/herizon-gea-01-fase-ib-ii-zanidatamab/#respond</comments>
		
		<dc:creator><![CDATA[Susana Rodríguez]]></dc:creator>
		<pubDate>Thu, 19 Feb 2026 13:05:02 +0000</pubDate>
				<category><![CDATA[Artículos comentados]]></category>
		<category><![CDATA[Adenocarcinoma gástrico]]></category>
		<category><![CDATA[HER2]]></category>
		<category><![CDATA[HER2 positivo]]></category>
		<category><![CDATA[HERIZON-GEA-01]]></category>
		<category><![CDATA[inmunoterapia]]></category>
		<category><![CDATA[PD-L1]]></category>
		<category><![CDATA[tratamiento 1L]]></category>
		<category><![CDATA[UGE]]></category>
		<category><![CDATA[zanidatamab]]></category>
		<guid isPermaLink="false">https://grupottd.org/?p=12445</guid>

					<description><![CDATA[El estudio fase Ib/II HERIZON-GEA-01 evalúa la combinación de zanidatamab, tislelizumab y quimioterapia en primera línea del adenocarcinoma gástrico/UGE HER2 positivo, mostrando altas tasas de respuesta y una señal de beneficio duradero. El doble bloqueo HER2 mediante un anticuerpo biespecífico introduce una estrategia biológicamente novedosa, actualmente confirmada en fase III, que podría modificar el estándar terapéutico en esta población.]]></description>
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					<h2 class="elementor-heading-title elementor-size-default">HERIZON-GEA-01 (fase Ib/II zanidatamab)</h2>				</div>
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					<p class="elementor-heading-title elementor-size-default">Publicación científica 2025</p>				</div>
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					<h4 class="elementor-heading-title elementor-size-default">Fecha:</h4>				</div>
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					<p class="elementor-heading-title elementor-size-default">20 de febrero de 2026</p>				</div>
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					<p class="elementor-heading-title elementor-size-default">Keun-Wook Lee, Li-Yuan Bai, Minkyu Jung, Jieer Ying, Young-Hyuck Im, Do-Youn Oh, Jae Yong Cho, Sang Cheul Oh, Yee Chao, Jin Won Kim, Ye Chen, Vincent Li, Shengnan Chen, and Yoon-Koo Kang</p>				</div>
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					<p class="elementor-heading-title elementor-size-default">Laura Visa Turmo. Hospital del Mar Research Institute. Barcelona (Miembro de la Asamblea General del Grupo TTD)</p>				</div>
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									<p>El estudio fase Ib/II HERIZON-GEA-01 evalúa la combinación de zanidatamab, tislelizumab y quimioterapia en primera línea del adenocarcinoma gástrico/UGE HER2 positivo, mostrando altas tasas de respuesta y una señal de beneficio duradero. El doble bloqueo HER2 mediante un anticuerpo biespecífico introduce una estrategia biológicamente novedosa, actualmente confirmada en fase III, que podría modificar el estándar terapéutico en esta población.</p>								</div>
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		<title>KEYNOTE-590 (seguimiento 5 años)</title>
		<link>https://grupottd.org/keynote-590-seguimiento-5-anos/</link>
					<comments>https://grupottd.org/keynote-590-seguimiento-5-anos/#respond</comments>
		
		<dc:creator><![CDATA[Susana Rodríguez]]></dc:creator>
		<pubDate>Thu, 19 Feb 2026 12:54:53 +0000</pubDate>
				<category><![CDATA[Artículos comentados]]></category>
		<category><![CDATA[adenocarcinoma unión gastro-esofágica]]></category>
		<category><![CDATA[Biomarcadores]]></category>
		<category><![CDATA[cáncer de esófago avanzado]]></category>
		<category><![CDATA[PD-L1]]></category>
		<category><![CDATA[pembrolizumab]]></category>
		<category><![CDATA[quimioterapia 1L]]></category>
		<guid isPermaLink="false">https://grupottd.org/?p=12440</guid>

					<description><![CDATA[El seguimiento a 5 años del estudio KEYNOTE-590 confirma el beneficio sostenido de pembrolizumab más quimioterapia en primera línea del cáncer de esófago avanzado, con una triplicación de la supervivencia a largo plazo frente a quimioterapia sola. El efecto es especialmente relevante en carcinoma escamoso y tumores con mayor expresión de PD-L1. Estos resultados consolidan la inmunoterapia como pilar terapéutico y refuerzan la importancia de la selección por biomarcadores.]]></description>
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					<h2 class="elementor-heading-title elementor-size-default">KEYNOTE-590 (seguimiento 5 años)</h2>				</div>
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					<h5 class="elementor-heading-title elementor-size-default">Edición:</h5>				</div>
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					<p class="elementor-heading-title elementor-size-default">Publicación científica 2025</p>				</div>
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					<h4 class="elementor-heading-title elementor-size-default">Fecha:</h4>				</div>
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					<p class="elementor-heading-title elementor-size-default">20 de febrero de 2026</p>				</div>
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					<h4 class="elementor-heading-title elementor-size-default">Autor:</h4>				</div>
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					<p class="elementor-heading-title elementor-size-default">J.-P. Metges, K. Kato, J.-M. Sun, L. Shen, P. C. Enzinger, A. Adenis, T. Doi, T. Kojima, Z. Li, S.-B. Kim, B. C. Cho,  W. Mansoor, S.-H. Li, P. Sunpaweravong, M. Alsina, G. L. Buchschacher Jr, H. Hara, A. Tsuji, J. Wu,  S. Shah, P. Bhagia &amp; M. A. Shah </p>				</div>
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					<h4 class="elementor-heading-title elementor-size-default">Autor de la revisión:</h4>				</div>
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					<p class="elementor-heading-title elementor-size-default">Laura Visa Turmo. Hospital del Mar Research Institute, Barcelona. (Miembro de la Asamblea General del Grupo TTD)</p>				</div>
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									<p>El seguimiento a 5 años del estudio KEYNOTE-590 confirma el beneficio sostenido de pembrolizumab más quimioterapia en primera línea del cáncer de esófago avanzado, con una triplicación de la supervivencia a largo plazo frente a quimioterapia sola. El efecto es especialmente relevante en carcinoma escamoso y tumores con mayor expresión de PD-L1. Estos resultados consolidan la inmunoterapia como pilar terapéutico y refuerzan la importancia de la selección por biomarcadores.</p>								</div>
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