<?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>1816-8949</journal-id>
<journal-title><![CDATA[Anales de la Facultad de Ciencias Médicas (Asunción)]]></journal-title>
<abbrev-journal-title><![CDATA[An. Fac. Cienc. Méd. (Asunción)]]></abbrev-journal-title>
<issn>1816-8949</issn>
<publisher>
<publisher-name><![CDATA[EFACIM. Editorial de la Facultad de Ciencias Médicas - Universidad Nacional de Asunción]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1816-89492022000200032</article-id>
<article-id pub-id-type="doi">10.18004/anales/2022.055.02.32</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Riesgo de recurrencia y factores de riesgo de invasión del cáncer diferenciado de tiroides]]></article-title>
<article-title xml:lang="en"><![CDATA[Risk of recurrence and risk factors for invasion of differentiated thyroid cancer]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velázquez]]></surname>
<given-names><![CDATA[Sebastián Aníbal]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Romero]]></surname>
<given-names><![CDATA[Fabiola Marlene]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López]]></surname>
<given-names><![CDATA[Helen María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[Ana Iris]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Benítez]]></surname>
<given-names><![CDATA[Aldo Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez]]></surname>
<given-names><![CDATA[Jorge Tadeo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cabrera]]></surname>
<given-names><![CDATA[Francisco Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vigo]]></surname>
<given-names><![CDATA[Liliana Beatriz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valinotti]]></surname>
<given-names><![CDATA[Elizabeth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[Ingrid Milva]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valdez]]></surname>
<given-names><![CDATA[Silvia Liliana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cabañas]]></surname>
<given-names><![CDATA[María Luisa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Asunción Facultad de Ciencias Médicas Hospital de Clínicas, Departamento de Endocrinología y Metabolismo]]></institution>
<addr-line><![CDATA[San Lorenzo ]]></addr-line>
<country>Paraguay</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto de Previsión Social Hospital Central Servicio de Endocrinología y Metabolismo]]></institution>
<addr-line><![CDATA[Asunción ]]></addr-line>
<country>Paraguay</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto de Previsión Social Hospital Central Servicio de Anatomía Patológica]]></institution>
<addr-line><![CDATA[Asunción ]]></addr-line>
<country>Paraguay</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional de Asunción Facultad de Ciencias Médicas Hospital de Clínicas, Departamento de Anatomía Patológica]]></institution>
<addr-line><![CDATA[San Lorenzo ]]></addr-line>
<country>Paraguay</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Instituto Nacional del Cáncer Servicio de Anatomía Patológica ]]></institution>
<addr-line><![CDATA[Asunción ]]></addr-line>
<country>Paraguay</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2022</year>
</pub-date>
<volume>55</volume>
<numero>2</numero>
<fpage>32</fpage>
<lpage>39</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_arttext&amp;pid=S1816-89492022000200032&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_abstract&amp;pid=S1816-89492022000200032&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_pdf&amp;pid=S1816-89492022000200032&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción:  El cáncer diferenciado de tiroides (CDT) se encuentra representado por el carcinoma papilar y el carcinoma folicular. Comprende la gran mayoría (&gt;90%) de todos los cánceres de tiroides.  Objetivos:  Estratificar el riesgo de recurrencia inicial de los pacientes con CDT. Relacionar la edad, sexo y tamaño tumoral con el riesgo de recurrencia, invasión capsular, ganglionar, vascular y de tejido peritiroideo.  Materiales y métodos:  Estudio observacional, descriptivo, retrospectivo, de corte transversal con componente analítico. Se incluyó a 432 pacientes con diagnóstico de CDT del Hospital de Clínicas, Instituto de Previsión Social e Instituto Nacional del Cáncer entre 2011 y 2015.  Resultados:  El 87% fueron del sexo femenino. La edad media fue de 43±14 años. Predominó el riesgo de recurrencia bajo en el 49% de los pacientes, seguido del riesgo intermedio (33%) y riesgo alto (18%). El tamaño tumoral &#707;1cm confiere mayor riesgo de ser estratificado como riesgo de recurrencia intermedio/alto (OR 5,7 IC 95% 3,6-9). El sexo masculino representó mayor riesgo de invasión ganglionar (OR 2,8 IC 95% 1,2-6,6); la edad &#8805;55 años lo fue en la invasión vascular (OR 2,1 IC 95% 1,1-4,1); el tamaño &gt;1cm constituyó un mayor riesgo de manera significativa de invasión capsular (OR 10,5 IC 95% 6,5-17), invasión ganglionar (OR 10,2 IC 95% 3,8-26,9), invasión vascular (OR 30,7 IC 95% 4,2-224) e invasión de tejido peritiroideo (OR 5,2 IC 95% 3,3-8,2).  Conclusión:  El riesgo de recurrencia inicial más frecuente fue el riesgo bajo. El sexo masculino, la edad &#8805;55años y el tamaño &gt;1cm constituyen factores de riesgo de invasión a estructuras vecinas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction:  Differentiated thyroid cancer (DTC) is represented by papillary carcinoma and follicular carcinoma. It comprises the vast majority (&gt; 90%) of all thyroid cancers.  Objectives:  Stratify the risk of initial recurrence of patients with DTC. Relate age, sex, and tumor size to the risk of recurrence, capsular, nodal, vascular, and perithyroid tissue invasion.  Materials and methods:  Observational, descriptive, retrospective, cross-sectional study with an analytical component. A total of 432 patients with a diagnosis of DTC from Hospital de Clínicas, Instituto de Previsión Social and Instituto Nacional del Cáncer between 2011 and 2015 were included.  Results:  87% were female. The mean age was 43 ± 14 years. Low recurrence risk predominated in 49% of patients, followed by intermediate risk (33%) and high risk (18%). Male sex, age &#8805;55 years and tumor size &#707;1cm confer a higher risk of being stratified as intermediate / high recurrence risk, but only size&gt; 1cm was significantly (OR 5.7 95% CI 3.6-9). Male sex represented a higher risk of lymph node invasion (OR 3.1 95% CI 1.4-2.8) and vascular invasion (OR 2.3 95% CI 1.1-4.8); age &#8805;55 years was in the vascular invasion (OR 2.6 95% CI 1.4-4.9); size&gt; 1cm constituted a significantly higher risk of capsular invasion (OR 10.7 95% CI 6.7-17.3), nodal invasion (OR 10.5 95% CI 4-27.7), vascular invasion (OR 33 95% CI 4.5-244) and invasion of perithyroid tissue (OR 5.1 95% CI 3.2-8.1).  Conclusion:  The most frequent initial recurrence risk was low risk. Male sex, age &#8805;55 years, and size&gt; 1cm are risk factors for invasion of neighboring structures.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[cáncer diferenciado de tiroides]]></kwd>
<kwd lng="es"><![CDATA[riesgo de recurrencia]]></kwd>
<kwd lng="es"><![CDATA[invasión capsular]]></kwd>
<kwd lng="es"><![CDATA[ganglionar]]></kwd>
<kwd lng="es"><![CDATA[vascular]]></kwd>
<kwd lng="es"><![CDATA[tejido peritiroideo.]]></kwd>
<kwd lng="en"><![CDATA[differentiated thyroid cancer]]></kwd>
<kwd lng="en"><![CDATA[risk of recurrence]]></kwd>
<kwd lng="en"><![CDATA[capsular invasion]]></kwd>
<kwd lng="en"><![CDATA[nodal]]></kwd>
<kwd lng="en"><![CDATA[vascular]]></kwd>
<kwd lng="en"><![CDATA[perithyroid tissue.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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