<?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>S2565-005X2020000100007</article-id>
<article-id pub-id-type="doi">10.24875/j.gamo.19000338</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Relación del tamaño tumoral y extensión extratiroidea con la recaída local en el cáncer diferenciado de tiroides en población mexicana]]></article-title>
<article-title xml:lang="en"><![CDATA[Association of tumor size and extrathyroid extension with local relapse in differentiated thyroid cancer in the Mexican population]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Gómez]]></surname>
<given-names><![CDATA[Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Granados-García]]></surname>
<given-names><![CDATA[Martín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palafox-Parrilla]]></surname>
<given-names><![CDATA[E. Alejandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Granell]]></surname>
<given-names><![CDATA[José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez-Fonseca]]></surname>
<given-names><![CDATA[Raimundo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Cancerología Departamento de Cabeza y Cuello ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Cancerología Coordinación Nacional de Programas de Prevención y Control del Cáncer Departamento de Epidemiología]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital Universitario Rey Juan Carlos Servicio de Otorrinolaringología ]]></institution>
<addr-line><![CDATA[Madrid ]]></addr-line>
<country>España</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<volume>19</volume>
<numero>1</numero>
<fpage>7</fpage>
<lpage>14</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2565-005X2020000100007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2565-005X2020000100007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2565-005X2020000100007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: El cáncer de tiroides es la segunda neoplasia con mayor incidencia en las mujeres mexicanas. Su baja mortalidad indica que podría tratarse con lobectomía sin sacrificar curación, nuestro objetivo fue encontrar un tamaño tumoral asociado con bajo riesgo de recaída local para recomendarl  Material y métodos: Se estudió una cohorte retrospectiva de 278 casos y seleccionamos 91 pacientes para un análisis. Catorce casos fueron sometidos a lobectomía y se compararon con 77 controles tratados con tiroidectomía total, previamente pareado por los principales factores pronósticos. Se estudió la relación del tamaño tumoral con la extensión extratiroidea, así mismo, el tamaño tumoral y el tipo de cirugía con la recaída  Resultados: El tamaño tumoral mayor de 2 cm se asoció con un RR de 5.5 (IC 95%: 2.8-10.9) de presentar extensión extratiroidea macroscópica. Se encontró segundos primarios en el 19% de la cohorte  Conclusiones: Existe una relación entre el tamaño tumoral y el riesgo de extensión extratiroidea. Los pacientes con tumores menores de 2 cm tratados con lobectomía no tuvieron riesgo de recaída distinto respecto los tratados con tiroidectomía total. La lobectomía puede realizarse en un grupo seleccionado de pacientes con tumores menores de 2 cm.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: Thyroid cancer is the second neoplasm with higher incidence in Mexican women. Its low mortality indicates that it could be treated with hemithyroidectomy without sacrificing cure, our objective was to find a tumor size associated with a risk of local relapse to recommend this procedure  Material and methods: We studied a retrospective cohort of 278 cases, and selected 91 patients for a matched pair analysis. There were 14 cases treated with hemithyroidectomy alone and they were compared with 77 controls treated with total thyroidectomy and previously paired for the main prognostic factors. The relationship between tumor size and extrathyroid extension was studied. Also the tumor size and the extension of the surgery with relapse  Results: Tumor size greater than 2 cm was associated with a RR 5.5 of presenting extrathyroidal macroscópica extension, 19% of patients had second malignancies  Conclusions: There is a relationship between extrathyroidal extension and tumor size. Patients with tumor size less than 2 cm and treated with hemithyroidectomy alone were not distinct in relapse rate when compared with those treated with total thyroidectomy. Therefore, hemithyroidectomy can be appropriate for selected patients with tumors smaller than 2 cm.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Lobectomía]]></kwd>
<kwd lng="es"><![CDATA[Extensión extratiroidea]]></kwd>
<kwd lng="es"><![CDATA[Cáncer diferenciado de tiroides]]></kwd>
<kwd lng="es"><![CDATA[Recaída local]]></kwd>
<kwd lng="es"><![CDATA[Tamaño tumoral]]></kwd>
<kwd lng="en"><![CDATA[Lobectomy]]></kwd>
<kwd lng="en"><![CDATA[Extrathyroidal extension]]></kwd>
<kwd lng="en"><![CDATA[Differentiated thyroid cancer]]></kwd>
<kwd lng="en"><![CDATA[Local recurrence]]></kwd>
<kwd lng="en"><![CDATA[Tumor size]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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