<?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>S0300-90412022000500466</article-id>
<article-id pub-id-type="doi">10.24245/gom.v90i5.6228</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Tumor de colisión en el ovario, con fibrotecoma. Reporte de un caso]]></article-title>
<article-title xml:lang="en"><![CDATA[Collision tumor in the ovary, with fibrothecoma. Case report.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez-Herrera]]></surname>
<given-names><![CDATA[Rebeca]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Y Ballinas]]></surname>
<given-names><![CDATA[Ariadna]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández-Vázquez]]></surname>
<given-names><![CDATA[María Urbelina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palmer-Márquez]]></surname>
<given-names><![CDATA[María de Lourdes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rugerio-Ramos]]></surname>
<given-names><![CDATA[Marina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Hospital General de Zona 20 ]]></institution>
<addr-line><![CDATA[ Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Hospital General de Zona 20 ]]></institution>
<addr-line><![CDATA[ Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Hospital General de Zona 20 ]]></institution>
<addr-line><![CDATA[ Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Centro Médico Manuel Ávila Camacho ]]></institution>
<addr-line><![CDATA[ Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Hospital General de Zona 20 ]]></institution>
<addr-line><![CDATA[ Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<volume>90</volume>
<numero>5</numero>
<fpage>466</fpage>
<lpage>471</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0300-90412022000500466&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0300-90412022000500466&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0300-90412022000500466&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  ANTECEDENTES: La coincidencia temporo-espacial de dos o más neoplasias benignas, malignas o combinadas, que afectan a un mismo órgano o tejido es lo que define al tumor de colisión, con diferencias conductuales, genéticas e histológicas. Los tumores de colisión ovárica son un subtipo raro.  CASO CLÍNICO:  Paciente de 53 años, que acudió al servicio de Urgencias debido a un dolor intermitente de siete meses de evolución que, en las últimas semanas, se intensificó y se agregaron náuseas y vómitos. Durante la exploración abdominal se detectó un aumento de volumen en el área pélvica, sin irritación peritoneal. Los marcadores tumorales: CA-125, CA 19-9 y antígeno carcinoembrionario se reportaron en parámetros normales. La ecografía pélvica informó la existencia de una imagen quística simple y compleja, con componente sólido. El examen de anatomía patológica diagnosticó: tumor de colisión en el ovario izquierdo.  CONCLUSION: Los tumores de colisión en el ovario son poco frecuentes según lo reportado en la bibliografía. El diagnóstico anatomopatológico minucioso y el seguimiento clínico-radiológico adecuado son necesarios para descartar los tumores de colisión.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  BACKGROUND: The temporal-spatial coincidence of two or more benign, malignant or combined neoplasms that affect the same organ or tissue is what defines the collision tumor, with behavioral, genetic and histological differences. Ovarian collision tumors are a rare subtype.  CLINICAL CASE:  A 53-year-old patient, who came to the Emergency Department due to intermittent pain of seven months&amp;apos; evolution, which, in recent weeks, intensified and nausea and vomiting were added. During abdominal examination, an increase in volume was detected in the pelvic area, without peritoneal irritation. Tumor markers: CA-125, CA 19-9 and carcinoembryonic antigen were reported in normal parameters. Pelvic ultrasound reported the existence of a simple and complex cystic image, with a solid component. Pathological anatomy examination diagnosed: collision tumor in the left ovary.  CONCLUSION:  Collision tumors in the ovary are rare according to reports in the literature. A thorough pathological diagnosis and adequate clinical-radiological follow-up are necessary to rule out colliding tumors.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Tumor de colisión]]></kwd>
<kwd lng="es"><![CDATA[ovario]]></kwd>
<kwd lng="es"><![CDATA[neoplasia]]></kwd>
<kwd lng="es"><![CDATA[dolor abdominal]]></kwd>
<kwd lng="es"><![CDATA[marcadores tumorales]]></kwd>
<kwd lng="en"><![CDATA[Collision tumor]]></kwd>
<kwd lng="en"><![CDATA[Ovary]]></kwd>
<kwd lng="en"><![CDATA[Neoplasia]]></kwd>
<kwd lng="en"><![CDATA[Abdominal pain]]></kwd>
<kwd lng="en"><![CDATA[Ultrasound]]></kwd>
<kwd lng="en"><![CDATA[Tumor markers]]></kwd>
</kwd-group>
</article-meta>
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