<?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>0300-9041</journal-id>
<journal-title><![CDATA[Ginecología y obstetricia de México]]></journal-title>
<abbrev-journal-title><![CDATA[Ginecol. obstet. Méx.]]></abbrev-journal-title>
<issn>0300-9041</issn>
<publisher>
<publisher-name><![CDATA[Federación Mexicana de Colegios de Obstetricia y Ginecología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0300-90412017001200862</article-id>
<article-id pub-id-type="doi">10.24245/gom.v85i12.1643</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Transformación maligna de un teratoma quístico maduro de ovario: reporte de un caso]]></article-title>
<article-title xml:lang="en"><![CDATA[Malignant transformation of an ovary mature cystic teratoma: Case report]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dorado-Roncancio]]></surname>
<given-names><![CDATA[EF]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carrillo-Garibaldi]]></surname>
<given-names><![CDATA[OJ]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Guadalajara Instituto Jalisciense de Cancerología ]]></institution>
<addr-line><![CDATA[Guadalajara ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Guadalajara  ]]></institution>
<addr-line><![CDATA[Guadalajara ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<volume>85</volume>
<numero>12</numero>
<fpage>862</fpage>
<lpage>867</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0300-90412017001200862&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0300-90412017001200862&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0300-90412017001200862&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Caso clínico: paciente de 59 años de edad, con degeneración maligna de un tumor de células germinales, de histología benigna, atendida en una institución de cuarto nivel de complejidad, ubicada en Guadalajara, Jalisco, México. Se revisó la bibliografía publicada en PubMed, Embase y SciELO con los términos de búsqueda: &#8220;tumor de células germinales&#8221;, &#8220;teratoma maduro&#8221;, &#8220;carcinoma de células escamosas&#8221;. La búsqueda se limitó a los artículos publicados en inglés y español.  Conclusiones:  la transformación maligna de un teratoma quístico es rara y su diagnóstico debe sospecharse cuando haya tumoraciones de rápido crecimiento en pacientes entre 50 y 60 años de edad y con estudios de imagen que orienten hacia un quiste dermoide. La elevación anormal del antígeno para carcinoma de células escamosas puede hacer sospechar el tumor, al igual que la elevación del CA-125, CA-19.9 y CAE. La cirugía siempre será el pilar fundamental para el tratamiento asociado con agentes citotóxicos con platinos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Clinical case: We present the case of a woman with malignant degeneration of a germ cell tumor of benign histology, attended at a fourth level institution of complexity, located in Guadalajara, Mexico. A review of the literature published in the Medline databases via PubMed, Embase and SciELO were performed using the search terms: "Germ cell tumor", "mature teratoma", "squamous cell carcinoma". The search was limited by language (articles in English and Spanish).  Conclusions: The malignant transformation of a cystic teratoma is rare and its diagnosis should be suspected when there are rapidly growing tumors in patients between 50 and 60 years old throughout imaging studies that point towards a dermoid cyst. Abnormal elevation levels of antigen for squamous cell carcinoma may raise the suspicion of the tumor, as does the elevation of CA-125, CA-19.9, and CAE. Surgery will always be the fundamental gold standard for the treatment associated with cytotoxic agents with platinum.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[tumor de células germinales]]></kwd>
<kwd lng="es"><![CDATA[teratoma]]></kwd>
<kwd lng="es"><![CDATA[quiste dermoide]]></kwd>
<kwd lng="es"><![CDATA[carcinoma de células escamosas]]></kwd>
<kwd lng="en"><![CDATA[Germ cell tumor]]></kwd>
<kwd lng="en"><![CDATA[Teratoma]]></kwd>
<kwd lng="en"><![CDATA[Dermoid cyst]]></kwd>
<kwd lng="en"><![CDATA[Squamous cell carcinoma]]></kwd>
</kwd-group>
</article-meta>
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