<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2565-005X</journal-id>
<journal-title><![CDATA[Gaceta mexicana de oncología]]></journal-title>
<abbrev-journal-title><![CDATA[Gac. mex. oncol.]]></abbrev-journal-title>
<issn>2565-005X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Oncología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2565-005X2023000500116</article-id>
<article-id pub-id-type="doi">10.24875/j.gamo.23000142</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Teratoma maduro mediastinal. Tratamiento con radioterapia externa hipofraccionada: reporte de caso]]></article-title>
<article-title xml:lang="en"><![CDATA[Mediastinal mature teratoma. Hypofractionated external beam radiotherapy treatment: a case report]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguiñaga-Orozco]]></surname>
<given-names><![CDATA[Ofelia F.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Maldonado-Magos]]></surname>
<given-names><![CDATA[Federico]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Centro Médico Nacional Ignacio García Téllez Hospital de Especialidades]]></institution>
<addr-line><![CDATA[Mérida Yuc]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México División de Estudios de Posgrado Facultad de Medicina]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nacional de Cancerología Radioterapia Torácica Departamento de Teleterapia]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<volume>22</volume>
<fpage>116</fpage>
<lpage>120</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2565-005X2023000500116&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2565-005X2023000500116&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2565-005X2023000500116&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El teratoma maduro es una neoplasia benigna y su tratamiento estándar es la resección quirúrgica. Existe escasa evidencia acerca del tratamiento con radioterapia, y con base en las características biológicas tumorales y su respuesta ante las técnicas antiguas, se desaconseja su uso. Presentamos el caso de un paciente de 55 años, con antecedente de tos y disfagia de dos años de evolución. Por tomografía computarizada y toma de biopsia se integró el diagnóstico de teratoma maduro mediastinal. Considerado irresecable, se dio tratamiento con radioterapia hipofraccionada, presentando mejoría clínica y funcional.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Mature teratoma is a benign neoplasm, the standard of care is surgical resection. There is little evidence about treatment with radiotherapy and based on the biological characteristics of the tumor and its response to the old techniques, its use is discouraged. We present the case of a 55-year-old male patient with a two-year history of cough and dysphagia. A diagnosis of mediastinal mature teratoma was integrated by computed tomography and biopsy. It was considered unresectable, thus hypofractionated radiotherapy was administered, presenting partial radiological response, with clinical and functional improvement.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Teratoma]]></kwd>
<kwd lng="es"><![CDATA[Mediastino]]></kwd>
<kwd lng="es"><![CDATA[Radioterapia]]></kwd>
<kwd lng="en"><![CDATA[Teratoma]]></kwd>
<kwd lng="en"><![CDATA[Mediastinum]]></kwd>
<kwd lng="en"><![CDATA[Radiotherapy]]></kwd>
</kwd-group>
</article-meta>
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