<?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>S2565-005X2025000500024</article-id>
<article-id pub-id-type="doi">10.24875/j.gamo.24000076</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Giant chondrosarcoma of the costal cage in an elderly female: case report]]></article-title>
<article-title xml:lang="es"><![CDATA[Condrosarcoma gigante de caja costal en una mujer anciana: reporte de caso]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sosa-Escobar]]></surname>
<given-names><![CDATA[Erika]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Servin-Martínez]]></surname>
<given-names><![CDATA[Ma. Fernanda]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortiz-Arce]]></surname>
<given-names><![CDATA[Cindy S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,High Specialty Medical Unit No. 25, IMSS, Monterrey, N.L High Specialty Medical Unit No. 25, IMSS, Monterrey, N.L ]]></institution>
<addr-line><![CDATA[San Luis ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,School of Medicine, Coordination of Educational Innovation in Health, Universidad Autónoma de San Luis Potosí Department of Coordination of Educational Innovation in Health ]]></institution>
<addr-line><![CDATA[San Luis ]]></addr-line>
<country>Mexico</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>24</fpage>
<lpage>29</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2565-005X2025000500024&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2565-005X2025000500024&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2565-005X2025000500024&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract A 75-year-old female presented with progressive increase in volume in the region of the costal cage of right hemithorax. Physical examination: Tumor of 30 × 20 cm depending on the 8th-9th costal cartilages, indurated, adherent to deep planes, slightly mobile. Tomography: Tumor extending to skin, displacing right lung, infiltrating diaphragm and liver. In bloc resection and diaphragm plasty were performed. The post-operative evolution was unfavorable. Chondrosarcoma of rib is a very rare tumor, also this case is important because describes an atypical presentation of the disease and we conclude that chest wall reconstruction is utmost importance for adequate evolution.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Mujer de 75 años, presenta aumento progresivo de volumen en región de caja costal, hemitórax derecho. Exploración física: Tumor de 30 × 20 cm dependiente de cartílagos costales 8-9°, indurado, adherente a planos profundos, ligeramente móvil. Tomografía: Tumor que se extiende a piel, desplaza pulmón derecho, infiltra diafragma e hígado. Se realizó resección en bloque y plastia de diafragma. Con evolución postoperatoria desfavorable. El condrosarcoma de costilla es un tumor muy raro, además este caso es importante porque describe una presentación atípica de la enfermedad y concluimos que la reconstrucción de la pared torácica es de suma importancia para una evolución adecuada.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Chondrosarcomas]]></kwd>
<kwd lng="en"><![CDATA[Sarcoma]]></kwd>
<kwd lng="en"><![CDATA[Bone neoplasm]]></kwd>
<kwd lng="en"><![CDATA[Surgical mesh]]></kwd>
<kwd lng="en"><![CDATA[Case report]]></kwd>
<kwd lng="es"><![CDATA[Condrosarcomas]]></kwd>
<kwd lng="es"><![CDATA[Sarcoma]]></kwd>
<kwd lng="es"><![CDATA[Neoplasia de hueso]]></kwd>
<kwd lng="es"><![CDATA[Malla quirúrgica]]></kwd>
<kwd lng="es"><![CDATA[Reporte de caso]]></kwd>
</kwd-group>
</article-meta>
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