<?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>S2565-005X2024000200071</article-id>
<article-id pub-id-type="doi">10.24875/j.gamo.23000041</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Breast cancer survival in Guerrero: oncologic care and geographic disparities in Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Supervivencia del cáncer de mama en Guerrero: atención oncológica y disparidades geográficas en México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ocampo-Bárcenas]]></surname>
<given-names><![CDATA[Azucena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ita]]></surname>
<given-names><![CDATA[Marlon De]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Meneses-Morales]]></surname>
<given-names><![CDATA[Ivan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morrugares-Ixtepan]]></surname>
<given-names><![CDATA[Martín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez-López]]></surname>
<given-names><![CDATA[Marco A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Estatal de Cancerología Dr. Arturo Beltrán Ortega Department of Pathological Anatomy ]]></institution>
<addr-line><![CDATA[Acapulco ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital Pediátrico Silvestre Frenk Freund, IMSS Human Genetics Research Unit (UIMGH) ]]></institution>
<addr-line><![CDATA[Mexico City ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Juárez del Estado de Durango, Dgo Department of Molecular Biology School of Chemical Sciences]]></institution>
<addr-line><![CDATA[Acapulco ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Hipócrates Research and Innovation Department ]]></institution>
<addr-line><![CDATA[Acapulco ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2024</year>
</pub-date>
<volume>23</volume>
<numero>2</numero>
<fpage>71</fpage>
<lpage>78</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2565-005X2024000200071&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2565-005X2024000200071&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2565-005X2024000200071&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: Breast cancer (BC) represents a public health concern among women. Despite the incidence and disparities in economic status, the state of Guerrero in Mexico demonstrates a lower BC mortality rate.  Objective: This study investigates the epidemiological characteristics, treatment modalities, and survival outcomes of BC patients in Guerrero, and compares these findings with national data.  Method: A retrospective cohort of 923 BC patients treated at the Instituto Estatal de Cancerología Dr. Arturo Beltrán Ortega, from 2010 to 2018 was analyzed. To determine the prognostic factors affecting survival, we employed overall survival analysis and the Cox proportional hazards model.  Results: The 5-year survival rate was of 73% (CI 95%: 69-76). BC patients &#8804; 40 years exhibited lower survival rates and a 1.5-fold higher risk of mortality. When comparing the triple-negative subtype to HER2-positive tumors, no significant differences in reducing the risk of death were observed.  Conclusion: Despite a higher prevalence of aggressive molecular subtypes in Guerrero, patients share clinical and epidemiological features with their counterparts in other Mexican regions.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: El cáncer de mama (CM) representa un problema de salud pública entre las mujeres. A pesar de la incidencia y las disparidades en el estatus económico, el estado de Guerrero en México demuestra una tasa de mortalidad por cáncer de mama más baja.  Objetivo: Este estudio investiga las características epidemiológicas, las modalidades de tratamiento y los resultados de supervivencia de los pacientes con CM en Guerrero y compara estos hallazgos con datos nacionales.  Método: Se analizó una cohorte retrospectiva de 923 pacientes con CM atendidos en el Instituto Estatal de Cancerología Dr. Arturo Beltrán Ortega, del 2010 al 2018. Para determinar los factores pronósticos que afectan la supervivencia, empleamos el análisis de supervivencia general y el modelo de riesgos proporcionales de Cox.  Resultados: La tasa de supervivencia a 5 años fue del 73% (IC 95%: 69-76). Los pacientes con BC &#8804; 40 años mostraron tasas de supervivencia más bajas y un riesgo de mortalidad 1.5 veces mayor. Al comparar el subtipo triple negativo con los tumores HER2 positivos, no se observaron diferencias significativas en la reducción del riesgo de muerte.  Conclusión: A pesar de una mayor prevalencia de subtipos moleculares agresivos en Guerrero, los pacientes comparten características clínicas y epidemiológicas con sus homólogos de otras regiones mexicanas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Breast cancer]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
<kwd lng="en"><![CDATA[Regions]]></kwd>
<kwd lng="en"><![CDATA[Molecular subtype]]></kwd>
<kwd lng="en"><![CDATA[Survival time]]></kwd>
<kwd lng="es"><![CDATA[Cáncer de mama]]></kwd>
<kwd lng="es"><![CDATA[México]]></kwd>
<kwd lng="es"><![CDATA[Regiones]]></kwd>
<kwd lng="es"><![CDATA[Subtipo molecular]]></kwd>
<kwd lng="es"><![CDATA[Tiempo de supervivencia]]></kwd>
</kwd-group>
</article-meta>
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