<?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>2444-054X</journal-id>
<journal-title><![CDATA[Cirugía y cirujanos]]></journal-title>
<abbrev-journal-title><![CDATA[Cir. cir.]]></abbrev-journal-title>
<issn>2444-054X</issn>
<publisher>
<publisher-name><![CDATA[Academia Mexicana de Cirugía A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2444-054X2020000700035</article-id>
<article-id pub-id-type="doi">10.24875/ciru.20001336</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Intrathyroidal thymic carcinoma misdiagnosed as a medullary thyroid carcinoma]]></article-title>
<article-title xml:lang="es"><![CDATA[Carcinoma tímico intratiroideo diagnosticado erróneamente como carcinoma medular de tiroides]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gonzales-Laguado]]></surname>
<given-names><![CDATA[Erick]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guerra-Miller]]></surname>
<given-names><![CDATA[Henry]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Ruiz]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Luna-Abanto]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Enfermedades Neoplásicas Department of Head and Neck Surgery ]]></institution>
<addr-line><![CDATA[Lima ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Enfermedades Neoplásicas Department of Pathology ]]></institution>
<addr-line><![CDATA[Lima ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nacional de Enfermedades Neoplásicas Department of Surgical Oncology ]]></institution>
<addr-line><![CDATA[Lima ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Nacional de Enfermedades Neoplásicas Department of Surgical Oncology ]]></institution>
<addr-line><![CDATA[Lima ]]></addr-line>
<country>Peru</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>88</volume>
<fpage>35</fpage>
<lpage>38</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2444-054X2020000700035&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2444-054X2020000700035&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2444-054X2020000700035&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The intrathyroidal thymic carcinoma is a rare neoplasm. The probable origin of this neoplasm is the presence of ectopic thymic tissue or remnants of the third and fourth branchial arch. The case of a 49-year-old female with an initial diagnosis of medullary thyroid cancer is presented. When she was operated for regional recurrence, 16 years later, the pathology report demonstrates the presence of a intrathyroidal thymic carcinoma. Intrathyroidal thymic carcinoma is considered an independent type of thyroid carcinoma because this entity has specific clinical-pathological characteristics similar to thymic carcinomas and different prognosis than known thyroid carcinomas. We present the case of a patient initially treated as having a medullary thyroid carcinoma who, upon presenting recurrence, the presence of intrathyroidal thymic carcinoma was demonstrated.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El carcinoma tímico intratiroideo es una neoplasia rara. El origen probable de esta neoplasia es la presencia de tejido tímico ectópico o de restos del tercer y cuarto arcos branquiales. Se presenta el caso de una mujer de 49 años con diagnóstico inicial de cáncer medular de tiroides. Cuando fue operada por recurrencia regional, 16 años después, se demostró la presencia de un carcinoma tímico intratiroideo, que se considera un tipo independiente de carcinoma tiroideo debido a que tiene características clínico-patológicas específicas similares a los carcinomas tímicos y un pronóstico diferente a los carcinomas de tiroides conocidos. Este caso se trató inicialmente como carcinoma medular de tiroides y al presentar recurrencia se demostró la presencia de un carcinoma tímico intratiroideo.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Intrathyroidal thymic carcinoma]]></kwd>
<kwd lng="en"><![CDATA[Thyroid cancer]]></kwd>
<kwd lng="en"><![CDATA[Carcinoma showing thymus-like differentiation]]></kwd>
<kwd lng="en"><![CDATA[Case report]]></kwd>
<kwd lng="es"><![CDATA[Carcinoma tímico intratiroideo]]></kwd>
<kwd lng="es"><![CDATA[Carcinoma tiroideo con diferenciación similar al carcinoma tímico]]></kwd>
<kwd lng="es"><![CDATA[Cáncer de tiroides]]></kwd>
<kwd lng="es"><![CDATA[CASTLE]]></kwd>
<kwd lng="es"><![CDATA[Reporte de caso]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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