<?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>S2565-005X2023000500013</article-id>
<article-id pub-id-type="doi">10.24875/j.gamo.22000082</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Reconstrucción mandibular con colgajo de pectoral en hemimandibulectomía por leiomiosarcoma]]></article-title>
<article-title xml:lang="en"><![CDATA[Mandibular reconstruction with pectoral flap in hemimandibulectomy for leiomyosarcoma]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Covarrubias-Rodríguez]]></surname>
<given-names><![CDATA[Jesús R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ochoa-Rodríguez]]></surname>
<given-names><![CDATA[Alfredo J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Camacho-Hernández]]></surname>
<given-names><![CDATA[Leonel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Hospital General Regional No.1 Servicio de Cirugía Oncológica]]></institution>
<addr-line><![CDATA[Ciudad Obregón Son]]></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>13</fpage>
<lpage>17</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2565-005X2023000500013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2565-005X2023000500013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2565-005X2023000500013&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los leiomiosarcomas intraóseos mandibulares primarios son neoplasias malignas muy raras. Independientemente de su localización, son tumores muy agresivos asociados a una alta recidiva local y/o metástasis a distancia con una supervivencia muy baja. La escisión quirúrgica completa está asociada con una menor recidiva y mayor supervivencia. La radioterapia es efectiva en el tratamiento de la enfermedad microscópica residual. Presentamos el caso de un paciente con leiomiosarcoma mandibular primario que requirió una amplia resección mandibular logrando márgenes quirúrgicos negativos y posteriormente tratamiento de reconstrucción con colgajo miocutáneo de músculo pectoral y placa de titanio.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Primary mandibular intraosseous leiomyosarcomas are very rare malignant neoplasms. Regardless of their location, they are very aggressive tumors associated with high local recurrence and/or distant metastasis with very low survival. Complete surgical excision is associated with less recurrence and longer survival. Radiation therapy is effective in treating residual microscopic disease. We present the case of a patient with primary mandibular leiomyosarcoma who required a wide mandibular resection, achieving negative surgical margins and subsequent reconstruction treatment with a pectoralis muscle myocutaneous flap and a titanium plate.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Leiomiosarcoma mandibular]]></kwd>
<kwd lng="es"><![CDATA[Hemimandibulectomía]]></kwd>
<kwd lng="es"><![CDATA[Colgajo pectoral CP]]></kwd>
<kwd lng="en"><![CDATA[Mandibular leiomyosarcomas]]></kwd>
<kwd lng="en"><![CDATA[Hemimandibulectomy]]></kwd>
<kwd lng="en"><![CDATA[Pectoral flap FP]]></kwd>
</kwd-group>
</article-meta>
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