<?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>S2565-005X2020000500032</article-id>
<article-id pub-id-type="doi">10.24875/j.gamo.19000357</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Supervivencia prolongada en leiomiosarcoma tiroideo metastásico: reporte de caso]]></article-title>
<article-title xml:lang="en"><![CDATA[Long term survival of metastatic leiomyosarcoma of the thyroid gland: A case report]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chávez-Tarazona]]></surname>
<given-names><![CDATA[Claudia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Shigihara-Mendoza]]></surname>
<given-names><![CDATA[Frank]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Virgen de la Puerta, EsSalud Servicio de Oncología ]]></institution>
<addr-line><![CDATA[Lima ]]></addr-line>
<country>Perú</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital de Emergencias Grau Servicio de Gastroenterología ]]></institution>
<addr-line><![CDATA[Lima ]]></addr-line>
<country>Perú</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>19</volume>
<fpage>32</fpage>
<lpage>35</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2565-005X2020000500032&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2565-005X2020000500032&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2565-005X2020000500032&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los sarcomas tiroideos tienen una prevalencia baja como tumores primarios de la tiroides y representan menos del 1% de todos los tumores tiroideos. La cirugía es el pilar del tratamiento, sin embargo, hasta la fecha a pesar del uso de quimioterapia la mortalidad es alta. El objetivo de este reporte es dar a conocer la supervivencia más larga de esta enfermedad en una etapa metastásica. Presentamos el caso de un paciente adulto joven con leiomiosarcoma primario tiroideo con metástasis hepáticas, sometido a cirugía de la tiroides, y que recibió esquema de quimioterapia a base de docetaxel y gemcitabina con buena tolerancia. El paciente tiene dos años de supervivencia hasta el último seguimiento.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Primary thyroid leiomyosarcoma represent less than 1% of all thyroid tumors. Surgery is the mainstay of the treatment, however, to date, despite the use of chemotherapy the mortality is high. The aim of this report is report the longest survival in a metastatic stage. We report a case of primary thyroid leiomyosarcoma with liver metastases in a young adult, who underwent surgery of the thyroid, and chemotherapy consisting of docetaxel and gemcitabine with good tolerance. The patient has 2-year survival until the last follow-up.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Tiroides]]></kwd>
<kwd lng="es"><![CDATA[Leiomiosarcoma]]></kwd>
<kwd lng="es"><![CDATA[Quimioterapia]]></kwd>
<kwd lng="en"><![CDATA[Thyroid]]></kwd>
<kwd lng="en"><![CDATA[Leiomyosarcoma]]></kwd>
<kwd lng="en"><![CDATA[Chemotherapy]]></kwd>
</kwd-group>
</article-meta>
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