<?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>S2565-005X2025000500052</article-id>
<article-id pub-id-type="doi">10.24875/j.gamo.25000091</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evolución y manejo de un paraganglioma retroperitoneal juvenil: seguimiento clínico y terapéutico. Reporte de caso]]></article-title>
<article-title xml:lang="en"><![CDATA[Evolution and management of a juvenile retroperitoneal paraganglioma: clinical and therapeutic approach. Case report]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Aguilar]]></surname>
<given-names><![CDATA[Jorge R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bárcenas-Lima]]></surname>
<given-names><![CDATA[David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Alonso]]></surname>
<given-names><![CDATA[Karla D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Martínez]]></surname>
<given-names><![CDATA[José A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cruz-Zarrabal]]></surname>
<given-names><![CDATA[Raymundo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital General de Pachuca Departamento de Cirugía General ]]></institution>
<addr-line><![CDATA[Pachuca ]]></addr-line>
<country>Hgo</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital General de Zona 1, IMSS Servicio de Cirugía ]]></institution>
<addr-line><![CDATA[Tlaxcala ]]></addr-line>
<country>Tlax</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital Universitario de Puebla Servicio de Cirugía General ]]></institution>
<addr-line><![CDATA[Puebla ]]></addr-line>
<country>Pue</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Grupo Médico CZ Coordinación de Investigación ]]></institution>
<addr-line><![CDATA[Apizaco ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<volume>24</volume>
<fpage>52</fpage>
<lpage>56</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2565-005X2025000500052&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2565-005X2025000500052&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2565-005X2025000500052&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los paragangliomas son tumores neuroendocrinos raros originados en células paraganglionares del sistema nervioso autónomo. Los retroperitoneales representan menos del 15% de los casos y son aún más infrecuentes en pacientes jóvenes. Se presenta el caso de una paciente de 20 años con un paraganglioma retroperitoneal no funcional. Se identificó una masa sólida mediante ultrasonografía y tomografía contrastada. La resección quirúrgica completa permitió confirmar el diagnóstico histopatológico. La paciente desarrolló fístula pancreática de bajo gasto y diabetes mellitus tipo 1 secundaria a la resección parcial del páncreas. La resección completa es fundamental para un manejo exitoso y un pronóstico favorable.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Paragangliomas are rare neuroendocrine tumors that originate from paraganglionic cells of the autonomic nervous system. Retroperitoneal paragangliomas account for less than 15% of cases and are even rarer in young patients. We report the case of a 20-year-old female with a non-functional retroperitoneal paraganglioma. Imaging studies, including ultrasonography and contrast-enhanced tomography, revealed a solid retroperitoneal mass. Complete surgical resection confirmed the histopathological diagnosis. Postoperatively, the patient developed a low-output pancreatic fistula and type 1 diabetes mellitus as a result of partial pancreatic resection. Complete surgical removal is critical for effective treatment and a favorable long-term prognosis.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Paraganglioma]]></kwd>
<kwd lng="es"><![CDATA[Retroperitoneal]]></kwd>
<kwd lng="es"><![CDATA[Tumor no funcional]]></kwd>
<kwd lng="es"><![CDATA[Diagnóstico por imagen]]></kwd>
<kwd lng="es"><![CDATA[Reporte de caso]]></kwd>
<kwd lng="en"><![CDATA[Paraganglioma]]></kwd>
<kwd lng="en"><![CDATA[Retroperitoneal]]></kwd>
<kwd lng="en"><![CDATA[Non-functional tumor]]></kwd>
<kwd lng="en"><![CDATA[Diagnostic imaging]]></kwd>
<kwd lng="en"><![CDATA[Case report]]></kwd>
</kwd-group>
</article-meta>
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