<?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>1665-5044</journal-id>
<journal-title><![CDATA[Revista mexicana de neurociencia]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. neurocienc.]]></abbrev-journal-title>
<issn>1665-5044</issn>
<publisher>
<publisher-name><![CDATA[Academia Mexicana de Neurología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-50442024000100010</article-id>
<article-id pub-id-type="doi">10.24875/rmn.23000062</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Location and morphology of cortical lesions in multiple sclerosis]]></article-title>
<article-title xml:lang="es"><![CDATA[Localización y morfología de las lesiones corticales en la esclerosis multiple]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bertado-Ramírez]]></surname>
<given-names><![CDATA[Nancy R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Santiago]]></surname>
<given-names><![CDATA[José A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Calderón-Cánovas]]></surname>
<given-names><![CDATA[José P.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Juárez-Mora]]></surname>
<given-names><![CDATA[Yasmín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Galicia]]></surname>
<given-names><![CDATA[Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Montiel-Jarquín]]></surname>
<given-names><![CDATA[Álvaro J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Loría-Castellanos]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Centro Médico Nacional "Gral. de Div. Manuel Ávila Camacho" Unidad Médica de Alta Especialidad Hospital de Especialidades de Puebla]]></institution>
<addr-line><![CDATA[Puebla ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Centro Médico Nacional "Gral. de Div. Manuel Ávila Camacho" Unidad Médica de Alta Especialidad Hospital de Especialidades de Puebla]]></institution>
<addr-line><![CDATA[Puebla ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro Médico Nacional "Gral. de Div. Manuel Ávila Camacho", IMSS Unidad Médica de Alta Especialidad Hospital de Especialidades de Puebla Jefatura de División de Investigación en Salud]]></institution>
<addr-line><![CDATA[Puebla ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Centro Médico Nacional "Gral. de Div. Manuel Ávila Camacho" Unidad Médica de Alta Especialidad Hospital de Especialidades de Puebla]]></institution>
<addr-line><![CDATA[Puebla ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Coordinación de Proyectos Especiales en Salud ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2024</year>
</pub-date>
<volume>25</volume>
<numero>1</numero>
<fpage>10</fpage>
<lpage>14</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-50442024000100010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-50442024000100010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-50442024000100010&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective: Multiple sclerosis (MS) is a chronic inflammatory demyelinating disease of the central nervous system. Diagnosis is based on the Mc-Donalds criteria, magnetic resonance imaging (MRI) studies, and the expanded disability status scale (EDSS) which assesses disease progression. These criteria do not include the recently described cortical lesions. The aim of the study was to describe the most frequent location and morphology of cortical lesions in patients with MS in Puebla, Mexico.  Methods: A descriptive, retrospective, cross-sectional, and analytical study was conducted on patients with MS at a tertiary care hospital. Patients diagnosed with relapsing-remitting, secondary-progressive, and progressive-relapsing MS variants with cranial magnetic resonance imaging were included in the study. Age, sex, MS variant, EDSS score, cognitive impairment, annual relapse rate, morphology, location, and number of cortical lesions were evaluated. Descriptive statistics were used. To compare features between groups, the &#967;2 test was used, and for correlations, the Spearman's Correlation Coefficient was used. A p &#8804; 0.05 was considered significant.  Results: Twenty-five patients met the selection criteria. The most frequent location of cortical lesions was the parietal region 84%, and the second was the temporal region 16%. The most common morphology was juxtacortical at 64% and mixed at 36%. The most frequent variant of MS was relapsing-remitting, present in 92%, and 8% had the secondary progressive variant. In the EDSS scale, the scores most frequently observed were 0.0 and 3.5.  Conclusions: The most frequent location of cortical lesions was in the parietal region, and the most common morphology was juxtacortical.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo: La esclerosis múltiple es una enfermedad desmielinizante inflamatoria crónica del sistema nervioso central. El diagnóstico se basa en los criterios de Mc-Donalds, los estudios de Resonancia Magnética y la Escala Expandida del Estado de Discapacidad (EDSS) que evalúa la progresión de la enfermedad. Estos criterios no incluyen las lesiones corticales descritas recientemente. Describir la localización y morfología más frecuente de lesiones corticales en pacientes con esclerosis múltiple en Puebla, México.  Métodos: Se realizó un estudio descriptivo, retrospectivo, transversal y analítico en pacientes con esclerosis múltiple en un hospital de tercer nivel de atención. Se incluyeron pacientes con diagnóstico de Esclerosis Múltiple con variantes Remitente-Recurrente, Secundaria-Progresiva y Progresiva-Recurrente con resonancia magnética de cráneo. Se evaluó edad, sexo, variante de esclerosis múltiple, puntaje de EDSS, deterioro cognitivo, tasa de recaída anual, morfología, ubicación y numero de lesiones corticales. Se utilizó estadística descriptiva. Para comparar características entre grupos se utilizó &#967;2, para correlaciones se utilizó Coeficiente de Correlación de Spearman. Una p &#8804; 0.05 se consideró significativa.  Resultados: 25 pacientes cumplieron con criterios de selección. La localización más frecuente de lesiones corticales fue la región parietal 84% y la segunda temporal 16%. La morfología más frecuente fue la yuxtacortical en un 64%, y la mixta en 36%. La variante más frecuente de esclerosis múltiple fue Remitente-Recurrente presente en 92%, y 8% la variante Secundaria Progresiva. En la escala de EDDS la puntuación con mayor frecuencia fue 0.0 y 3.5.  Conclusiones: La localización más frecuente de las lesiones corticales fue en región parietal y la morfología más frecuente la yuxtacortical.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Multiple sclerosis]]></kwd>
<kwd lng="en"><![CDATA[Cortical lesions]]></kwd>
<kwd lng="en"><![CDATA[Neurology]]></kwd>
<kwd lng="en"><![CDATA[Magnetic resonance imaging]]></kwd>
<kwd lng="es"><![CDATA[Esclerosis múltiple]]></kwd>
<kwd lng="es"><![CDATA[Lesiones corticales]]></kwd>
<kwd lng="es"><![CDATA[Neurología]]></kwd>
<kwd lng="es"><![CDATA[Resonancia magnética]]></kwd>
</kwd-group>
</article-meta>
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