<?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>1870-7203</journal-id>
<journal-title><![CDATA[Acta médica Grupo Ángeles]]></journal-title>
<abbrev-journal-title><![CDATA[Acta méd. Grupo Ángeles]]></abbrev-journal-title>
<issn>1870-7203</issn>
<publisher>
<publisher-name><![CDATA[Grupo Ángeles, Servicios de Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-72032025000200198</article-id>
<article-id pub-id-type="doi">10.35366/119493</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Resección de un liposarcoma retroperitoneal en bloque]]></article-title>
<article-title xml:lang="en"><![CDATA[En bloc resection of retroperitoneal liposarcoma]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gallardo Navarro]]></surname>
<given-names><![CDATA[Elías]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García Rodríguez]]></surname>
<given-names><![CDATA[Francisco M]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mancera Steiner]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Español  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital Español  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2025</year>
</pub-date>
<volume>23</volume>
<numero>2</numero>
<fpage>198</fpage>
<lpage>200</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-72032025000200198&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-72032025000200198&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-72032025000200198&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Introducción:  los liposarcomas retroperitoneales son tumores malignos poco frecuentes conocidos por su crecimiento lento y su difícil tratamiento.  Caso clínico:  masculino de 68 años de edad quien presenta distensión y dolor abdominal por lo que acude a urgencias, dentro de su abordaje diagnóstico se evidencia en tomografía axial computarizada (TAC) tumoración dependiente de retroperitoneo, se realiza laparotomía con resultado histopatológico de liposarcoma. La cirugía es la piedra angular del tratamiento, con el objetivo de lograr márgenes negativos.  Conclusión:  La experiencia en el manejo de un liposarcoma gigante con involucro de hemicolon derecho, que recubre órganos y estructuras adyacentes, llega a ser un reto quirúrgico, por lo que es fundamental tratar a los pacientes lo más pronto posible, mediante una cirugía radical en bloque.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Introduction:  retroperitoneal liposarcomas are rare malignant tumors known for their slow growth and brutal treatment.  Case report:  a 68-year-old male presented with abdominal distension and pain and was admitted to the emergency department. During the diagnostic approach, a computed axial tomography (CT) scan showed a tumor dependent on the retroperitoneum, and a laparotomy was performed with the histopathological result of liposarcoma. Surgery is the cornerstone of treatment to achieve negative margins.  Conclusion:  Experience in the management of a giant liposarcoma with right hemicolon involvement, which overlies adjacent organs and structures, becomes a surgical challenge, so it is essential to treat patients as early as possible, by radical en bloc surgery.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[liposarcoma retroperitoneal]]></kwd>
<kwd lng="es"><![CDATA[gigante]]></kwd>
<kwd lng="es"><![CDATA[masa abdominal]]></kwd>
<kwd lng="en"><![CDATA[retroperitoneal liposarcoma]]></kwd>
<kwd lng="en"><![CDATA[giant]]></kwd>
<kwd lng="en"><![CDATA[abdominal mass]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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