<?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>S2444-054X2020000600684</article-id>
<article-id pub-id-type="doi">10.24875/ciru.18000921</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Cociente ganglionar como factor pronóstico de recurrencia tumoral en pacientes con carcinoma escamoso de cavidad oral]]></article-title>
<article-title xml:lang="en"><![CDATA[Lymph node ratio as a prognosis factor associated with tumoral recurrence in patients with oral cavity squamous cell carcinoma]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Espinoza-Velazco]]></surname>
<given-names><![CDATA[Absalón]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Montoya]]></surname>
<given-names><![CDATA[Adriel S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carbajal-López]]></surname>
<given-names><![CDATA[Berenice]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Unidad Médica de Alta Especialidad No. 25 Departamento de Cirugía Oncológica]]></institution>
<addr-line><![CDATA[Monterrey Nuevo León]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Unidad Médica de Alta Especialidad No. 25 Investigación Clínica]]></institution>
<addr-line><![CDATA[Monterrey Nuevo León]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<volume>88</volume>
<numero>6</numero>
<fpage>684</fpage>
<lpage>689</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2444-054X2020000600684&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2444-054X2020000600684&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2444-054X2020000600684&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: El cociente ganglionar (LNR) es una herramienta reciente, pero su valor predictivo de recurrencia es incierto.  Objetivo: Evaluar el LNR como factor pronóstico de supervivencia libre de enfermedad (SLE) en pacientes con carcinoma oral de células escamosas.  Método: Estudio retrospectivo observacional. Pacientes con carcinoma oral de células escamosas sometidos a resección y disección ganglionar. Se aplicaroon las pruebas de ji al cuadrado, Kaplan-Meier, log rank y regresión de Cox; se consideró estadísticamente significativo p &#8804; 0.05 bilateral.  Resultados: Fueron incluidos 88 pacientes, el 45% (n = 40) hombres y el 54% (n = 48) mujeres, con una edad media de 60.42 (± 14.28) años. La principal localización tumoral fue la lengua (75%); el 61% en etapa I-III y el 39% en etapa IV. Se dividió en LNR &lt; 0.06 (58%) y LNR &#8805; 0.06 (42%). La mediana de SLE no fue alcanzada para ambos grupos (p = 0.018). Resultaron predictores de SLE el LNR (p = 0.024; hazard ratio [HR]: 2.20; intervalo de confianza del 95% [IC95%]: 1.11-4.39) y la etapa clínica (p = 0.004; HR: 1.76; IC95%: 1.19-2.59). En el análisis multivariado no se mantuvieron predictores (p = 0.227 y p = 0.191, respectivamente).  Conclusiones: Se observaron diferencias significativas en el análisis de SLE, pero no se mantuvieron como predictoras de recurrencia local en el análisis multivariado.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: The lymph node ratio (LNR) is a recent tool, but its predictive value for recurrence is uncertain.  Objective: To evaluate LNR as a prognostic factor for disease-free survival (DFS) in patients with oral squamous cell carcinoma.  Method: Retrospective observational study. Patients with oral squamous cell carcinoma undergoing resection and lymph node dissection. Chi squared, Kaplan-Meier, log rank and Cox regression tests were run; bilateral p &#8804; 0.05 determined statistical significance.  Results: 88 patients were included, 45% (n = 40) men and 54% (n = 48) women, mean age of 60.42 (± 14.28) years. Main tumor location in tongue (75%); 61% in clinical stage I-III and 39% in clinical stage IV. Population was divided into LNR &lt; 0.06 (58%) and LNR &#8805; 0.06 (42%). The median DFS was not reached for both groups (p = 0.018). Predictors of DFS were the LNR (p = 0.024; hazard ratio [HR]: 2.20; confidence interval of 95% [95% CI]: 1.11-4.39) and the clinical stage (p = 0.004; HR: 1.76; 95% CI: 1.19-2.59). In the multivariate analysis, predictors were not maintained (p = 0.227 and 0.191, respectively).  Conclusions: Significant differences were observed in the DFS analysis, however, they were not predictive of local recurrence in the multivariate analysis.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Carcinoma oral escamoso]]></kwd>
<kwd lng="es"><![CDATA[Cociente ganglionar]]></kwd>
<kwd lng="en"><![CDATA[Oral squamous carcinoma]]></kwd>
<kwd lng="en"><![CDATA[Node coefficient]]></kwd>
</kwd-group>
</article-meta>
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