<?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>1870-7203</journal-id>
<journal-title><![CDATA[Acta médica Grupo Ángeles]]></journal-title>
<abbrev-journal-title><![CDATA[Acta méd. Grupo Ángeles]]></abbrev-journal-title>
<issn>1870-7203</issn>
<publisher>
<publisher-name><![CDATA[Grupo Ángeles, Servicios de Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-72032018000300194</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Localización del cono medular por resonancia magnética en una población mexicana]]></article-title>
<article-title xml:lang="en"><![CDATA[Conus medullaris localization with magnetic resonance in a Mexican population]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez Gasca]]></surname>
<given-names><![CDATA[Luis Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Magaña Reyes]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mora Constantino]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alcocer Maldonado]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez Carrillo]]></surname>
<given-names><![CDATA[Luis Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital General León  ]]></institution>
<addr-line><![CDATA[León Guanajuato]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital Ángeles León Departamento de Imagenología ]]></institution>
<addr-line><![CDATA[León Guanajuato]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital Ángeles León Departamento de Imagenología ]]></institution>
<addr-line><![CDATA[León Guanajuato]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Hospital Ángeles León División de Cirugía ]]></institution>
<addr-line><![CDATA[León Guanajuato]]></addr-line>
<country>México</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad de Guanajuato Facultad de Medicina de León ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2018</year>
</pub-date>
<volume>16</volume>
<numero>3</numero>
<fpage>194</fpage>
<lpage>199</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-72032018000300194&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-72032018000300194&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-72032018000300194&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Introducción:  Existen varios estudios tanto de imagenología como en autopsias sobre la variación de la altura del cono medular.  Objetivo:  Determinar la altura del cono medular en adultos en una población mexicana.  Material y métodos:  Medición de la altura del cono medular en una muestra de 500 adultos mayores de 18 años, con resonancia magnética.  Resultados:  En muestra de 500 pacientes, 238 femeninos (47.6%) y 262 masculinos (52.4%), con edad promedio de 46 años (rango de 18 a 72), se observó variación de la altura del cono medular desde la mitad inferior de T1 al espacio L2-L3, con predominio de localización de la mitad inferior de L1 (n = 164), 45.8%, y del espacio L1-L2 (n = 152), 30.3%, sin diferencias en relación a edad ni género. Cuando el cono medular se localizó inferior al espacio L1-L2, se observó diferencia estadísticamente significativa (p de 0.05 y 0.03) a favor del género femenino.  Conclusiones:  El cono medular se localizó a la altura de la mitad inferior de L1 y el espacio L1-L2 en 76% de los casos, sin diferencia entre géneros ni edad, siendo predominante su localización inferior a estos niveles en el género femenino de la muestra estudiada.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Introduction:  There are several studies of imaging and autopsies of medullary cone height variation.  Objective:  To determine the height of the medullary cone in adults in a Mexican population.  Material and methods:  Measurement of medullary cone height in a sample of 500 adults over 18 years old, with magnetic resonance imaging.  Results:  In a sample of 500 patients, 238 female (47.6%) and 262 male (52.4%), with a mean age of 46 years (range from 18 to 72), it was observed a variation of the medullary cone height from the lower half of T1 to the L2-L3 space, with a predominance of the lower half of L1 (n = 164), 45.8%, and of the L1-L2 space (n = 152), 30.3 %, with no differences in relation to age or gender. When the medullary cone was located at level lower than L1-L2 space, a statistically significant difference (p of 0.05 and 0.03) was observed in the female gender.  Conclusions:  Medullary cone was located at the lower half of L1 and the L1-L2 space in 76% of the cases with no difference between genders or age, their predominance being below these levels in female gender at the studied sample.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cono medular]]></kwd>
<kwd lng="es"><![CDATA[resonancia magnética]]></kwd>
<kwd lng="en"><![CDATA[Medullary cone]]></kwd>
<kwd lng="en"><![CDATA[magnetic resonance]]></kwd>
</kwd-group>
</article-meta>
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