<?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>S1870-72032017000400287</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Neumomediastino espontáneo. Revisión con un caso ilustrativo]]></article-title>
<article-title xml:lang="en"><![CDATA[Spontaneous pneumomediastinum. A review with an illustrative case report]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arellano Aguilar]]></surname>
<given-names><![CDATA[Gregorio]]></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[Magaña Reyes]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Diez de Sollano Gutiérrez]]></surname>
<given-names><![CDATA[José Humberto]]></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 Ángeles León División de Medicina ]]></institution>
<addr-line><![CDATA[ Guanajuato]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital Ángeles León Departamento de Imagenología ]]></institution>
<addr-line><![CDATA[ Guanajuato]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital Ángeles León Departamento de Imagenología ]]></institution>
<addr-line><![CDATA[ Guanajuato]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Hospital Ángeles León  ]]></institution>
<addr-line><![CDATA[ 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>12</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<volume>15</volume>
<numero>4</numero>
<fpage>287</fpage>
<lpage>295</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-72032017000400287&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-72032017000400287&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-72032017000400287&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Introducción:  El neumomediastino espontáneo es una entidad poco frecuente que afecta con mayor frecuencia a varones jóvenes de entre 18 y 25 años de edad.  Caso clínico:  Masculino de 20 años, con antecedentes de tabaquismo desde los 16. Acudió por dolor retroesternal, transfictivo, irradiado a la región interescapular, que se incrementa con la inspiración, secundario a un acceso de tos. A la exploración: estatura 1.85 m; peso 87 kg; IMC 25.42; FC 85 lat./min; FR 18/min; TA 120/80; Temp. 36.6 oC; cuello normal; en el tórax, ruidos cardiacos rítmicos acompañados de crujido áspero sincrónico con el ritmo cardiaco, campos pulmonares con murmullo vesicular normal; resto normal, electrocardiograma normal y troponina cardiaca seriada indetectable. La tomografía de tórax mostró presencia de aire en el mediastino, extendiéndose caudalmente a la aorta descendente y a los vasos supraaórticos. Con el diagnóstico de neumomediastino espontáneo, se le manejó con reposo, analgésicos y oxígeno, 3 litros/min por 72 horas. Fue dado de alta asintomático.  Conclusiones:  El neumomediastino espontáneo es benigno y autolimitado, afecta a niños y adultos jóvenes; es ocasionado por asma, infecciones respiratorias, vómitos y/o tos intensa, y esfuerzos físicos con maniobras de Valsalva.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background:  Spontaneous pneumomediastinum is a rare entity that most commonly affects young males between 18 and 25 years of age.  Case report:  Twenty-year-old male, with a history of smoking since he was 16. He presented with retrosternal, transfictive pain, irradiated to the interscapular region, which increased with inspiration, secondary to a cough access. Physical examination: height 1.85 m; weight 87 kg; BMI 25.42; HR 85 beats/min; RR 18/min; BP 120/80; Temp. 36.6 oC; normal neck; chest: rhythmic cardiac sounds accompanied by a rough crunching sound synchronous with the heartbeat, pulmonary fields with a normal vesicular murmur; normal electrocardiogram and undetectable serial cardiac troponin. The chest CT scan showed the presence of air in the mediastinum extending caudally to the descending aorta and supra-aortic vessels. With the diagnosis of spontaneous pneumomediastinum, he was managed with rest, analgesics and oxygen, 3 liters/min for 72 hours. He was discharged asymptomatic.  Conclusions:  Spontaneous pneumomediastinum is generally benign and self-limited; it affects children and young adults; triggers include asthma, respiratory tract infections, vigorous vomiting or coughing, intense physical effort, or Valsalva maneuver.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Neumomediastino espontáneo]]></kwd>
<kwd lng="es"><![CDATA[neumomediastino]]></kwd>
<kwd lng="es"><![CDATA[dolor torácico]]></kwd>
<kwd lng="en"><![CDATA[Spontaneum pneumomediastinum]]></kwd>
<kwd lng="en"><![CDATA[pneumomediastinum]]></kwd>
<kwd lng="en"><![CDATA[chest pain]]></kwd>
</kwd-group>
</article-meta>
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<article-title xml:lang=""><![CDATA[Spontaneous pneumomediastinum Experience in 13 adult patients]]></article-title>
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<volume>23</volume>
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</article>
