<?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>S0300-90412023001100805</article-id>
<article-id pub-id-type="doi">10.24245/gom.v91i11.7516</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Factores asociados con la recidiva de cáncer de mama en pacientes con cirugía conservadora]]></article-title>
<article-title xml:lang="en"><![CDATA[Factors associated with breast cancer recurrence in patients with conservative surgery.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gerardo Toledo]]></surname>
<given-names><![CDATA[Ivonne Anahí]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barrón Reyes]]></surname>
<given-names><![CDATA[Jorge Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rivera Rojas]]></surname>
<given-names><![CDATA[José Adán]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarez Villaseñor]]></surname>
<given-names><![CDATA[Andrea Socorro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Benemérito Hospital General Juan María de Salvatierra  ]]></institution>
<addr-line><![CDATA[La Paz Baja California]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,Benemérito Hospital General Juan María de Salvatierra  ]]></institution>
<addr-line><![CDATA[La Paz Baja California]]></addr-line>
</aff>
<aff id="Af3">
<institution><![CDATA[,Benemérito Hospital General Juan María de Salvatierra  ]]></institution>
<addr-line><![CDATA[La Paz Baja California]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<volume>91</volume>
<numero>11</numero>
<fpage>805</fpage>
<lpage>813</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0300-90412023001100805&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0300-90412023001100805&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0300-90412023001100805&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  OBJETIVO: Identificar los factores asociados con la recidiva de cáncer de mama en pacientes con cirugía conservadora.  MATERIALES Y MÉTODOS: Estudio observacional, de cohorte retrospectiva, efectuado a partir de expedientes de pacientes con cáncer de mama en estadios tempranos e intervenidas con cirugía conservadora. Parámetros de estudio: estadio, subtipo histológico, perfil de expresión de receptores hormonales, tiempo de seguimiento, recidiva y periodo libre de enfermedad. La tasa de recidiva, el periodo libre de enfermedad y la identificación de los factores asociados con recidiva se hicieron con análisis estadístico.  RESULTADOS: Se estudiaron 53 pacientes con edad media de 51.0 ± 9.4 años. El subtipo histopatológico más frecuente fue el ductal en 49 de las 53 pacientes; en 48 de ellas los tumores fueron positivos para receptores de progesterona, en 7 de 53 para Her-2 y en 3 de 53 triple negativo. La tasa de recidiva de cáncer de mama fue de 13.2% (es decir: 7 de 53 pacientes). El tiempo libre de enfermedad en quienes recayeron fue de 30.6 ± 24.8 meses. En el análisis bivariado se asociaron significativamente con recidiva: los ganglios linfáticos positivos, la expresión de receptores de progesterona y de estrógenos, los tumores triple negativo y el tratamiento complementario con quimioterapia. En el análisis multivariado solo se asociaron con recidiva: tener un tumor triple negativo (OR = 51.8; IC95%: 4.9- 548.4; p = 0.001) y recibir quimioterapia (OR = 8.0; IC95%: 1.4-46.1; p = 0.020).  CONCLUSION: Los factores asociados con la recidiva fueron los ganglios linfáticos positivos, la expresión de receptores de progesterona y de estrógenos, tumores triple negativo y recibir quimioterapia.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  OBJECTIVE: To identify factors associated with breast cancer recurrence in patients undergoing conservative surgery.  MATERIALS AND METHODS: Observational, retrospective cohort study conducted on the records of patients with early-stage breast cancer who underwent conservative surgery. Study parameters: stage, histologic subtype, hormone receptor expression profile, follow-up time, recurrence and disease-free period. Statistical analysis was performed to estimate recurrence rate and disease-free period and to identify factors associated with recurrence.  RESULTS: Fifty-three patients with a mean age of 51.0 ± 9.4 years were evaluated. The most common histopathologic subtype was ductal in 49 of 53 patients; tumors were progesterone receptor positive in 48, Her-2 positive in 7 of 53, and triple negative in 3 of 53. The breast cancer recurrence rate was 13.2% (i.e., 7 of 53 patients). Disease-free time in those who relapsed was 30.6 ± 24.8 months. In bivariate analysis, positive lymph nodes, progesterone and estrogen receptor expression, triple-negative tumors, and adjuvant chemotherapy were significantly associated with recurrence. In multivariate analysis, only having a triple-negative tumor (OR = 51.8; 95%CI: 4.9-548.4; p = 0.001) and receiving chemotherapy (OR = 8.0; 95%CI: 1.4-58.4; p = 0.001) were associated with recurrence.  CONCLUSION: Factors associated with recurrence were positive lymph nodes, expression of progesterone and estrogen receptors, triple-negative tumors, and receipt of chemotherapy.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Recidiva del cáncer de mama]]></kwd>
<kwd lng="es"><![CDATA[receptores de progesterona]]></kwd>
<kwd lng="es"><![CDATA[neoplasias mamarias]]></kwd>
<kwd lng="es"><![CDATA[ganglios linfáticos]]></kwd>
<kwd lng="en"><![CDATA[Breast cancer recurrence]]></kwd>
<kwd lng="en"><![CDATA[Receptor progesterone]]></kwd>
<kwd lng="en"><![CDATA[Breast neoplasms]]></kwd>
<kwd lng="en"><![CDATA[Lymph nodes]]></kwd>
</kwd-group>
</article-meta>
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