<?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>S2565-005X2023000500074</article-id>
<article-id pub-id-type="doi">10.24875/j.gamo.22000104</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Rabdomiosarcoma alveolar con expresión aberrante de biomarcadores epiteliales y neuroendocrinos]]></article-title>
<article-title xml:lang="en"><![CDATA[Alveolar rhabdomyosarcoma with aberrant expression of epithelial and neuroendocrine epithelial and neuroendocrine biomarkers]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palencia-Palacios]]></surname>
<given-names><![CDATA[Maribel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Romero-Rojas]]></surname>
<given-names><![CDATA[Alfredo E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Parra-Medina]]></surname>
<given-names><![CDATA[Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Correa]]></surname>
<given-names><![CDATA[Patricia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad del Cauca Facultad de Medicina Departamento de Patología]]></institution>
<addr-line><![CDATA[Popayán ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Cancerología Laboratorio de Patología Oncológica ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Fundación Universitaria de Ciencias de la Salud Instituto de Investigación ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</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>74</fpage>
<lpage>79</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2565-005X2023000500074&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2565-005X2023000500074&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2565-005X2023000500074&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: El rabdomiosarcoma alveolar es un sarcoma con diferenciación de músculo esquelético que ocurre con mayor frecuencia en adolescentes y adultos jóvenes. Se considera de mal pronóstico. La ubicación más frecuente son las extremidades.  Descripción del caso: Mujer de 78 años, quien presenta masa heterogénea en muslo izquierdo de ocho meses de evolución, alcanzando un tamaño de 11 cm de diámetro, con compromiso vascular. La biopsia mostró un RMSa con expresión aberrante de marcadores epiteliales y neuroendocrinos.  Conclusiones: En la categoría de los RMSa es importante conocer el inmunofenotipo que los caracteriza, así como la expresión aberrante de marcadores epiteliales y neuroendocrinos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: Alveolar rhabdomyosarcoma (ARMSa) is a sarcoma with skeletal muscle differentiation, which occurs more frequently in adolescents and young adults, and is considered to have a poor prognosis. The most frequent location is the extremities.  Case description: A 78-year-old woman presented with a heterogeneous mass in the left thigh of 8 months of evolution, reaching a size of 11 cm in diameter, with vascular involvement. Biopsy showed an ARMSa with aberrant expression of epithelial and neuroendocrine markers.  Conclusions: In the category of ARMSa it is important to know the immunophenotype that characterizes them, as well as the aberrant expression of epithelial and neuroendocrine markers.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Rabdomiosarcoma alveolar]]></kwd>
<kwd lng="es"><![CDATA[Epitelial]]></kwd>
<kwd lng="es"><![CDATA[Sinaptofisina]]></kwd>
<kwd lng="es"><![CDATA[Cromogranina]]></kwd>
<kwd lng="es"><![CDATA[Inmunohistoquímica]]></kwd>
<kwd lng="en"><![CDATA[Alveolar rhabdomyosarcoma]]></kwd>
<kwd lng="en"><![CDATA[Epithelial]]></kwd>
<kwd lng="en"><![CDATA[Synaptophysin]]></kwd>
<kwd lng="en"><![CDATA[Chromogranin]]></kwd>
<kwd lng="en"><![CDATA[Immunohistochemistry]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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