<?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>S1870-72032019000400395</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Anomalía congénita del arco posterior del atlas en adulto]]></article-title>
<article-title xml:lang="en"><![CDATA[Congenital anomaly of the atlas in adult]]></article-title>
</title-group>
<contrib-group>
<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 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[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 Gasca]]></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[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 División de Cirugía ]]></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>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>17</volume>
<numero>4</numero>
<fpage>395</fpage>
<lpage>399</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-72032019000400395&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-72032019000400395&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-72032019000400395&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Introducción:  Los defectos congénitos del arco posterior del atlas presentan incidencia de 0.7 a 3%. La mayoría de los pacientes habitualmente son asintomáticos, el diagnóstico se efectúa de manera casual al realizar radiografías de columna cervical posterior a traumatismo.  Caso clínico:  Masculino de 59 años, quien sufrió accidente de tránsito cinco meses atrás; acude a rehabilitación con manifestaciones intermitentes de amaurosis fugaz, obnubilación, sensación de vértigo giratorio con episodios de duración no mayor de 10 segundos relacionados con movimientos de cuello, asociados a cervicalgia y cefalea occipital moderadas; a la exploración, marcha normal, Romberg ausente, pares craneales normales, columna cervical con movimientos completos y ausencia de contracturas musculares de paravertebrales. Las radiografías mostraron: ausencia de arco posterior del atlas, persistencia del tubérculo posterior; asimetría de masas laterales, anterolistesis C4/C5, inversión de la lordosis y escoliosis izquierda; las proyecciones dinámicas y la tomografía confirmaron el diagnóstico; el paciente se derivó a neurocirugía para manejo de la espondilolistesis.  Conclusión:  Las anomalías congénitas del atlas pueden confundirse con fractura de Jefferson en los servicios de urgencias.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Introduction:  Posterior arch of the atlas congenital defects show an incidence of 0.7 to 3%. Most patients are usually asymptomatic, and the diagnosis is performed when X-rays are taken after cervical trauma.  Clinical report:  59 years old male, with a history of automobilistic accident five months ago, who goes to rehabilitation department with intermittent manifestations of amaurosis fugax, obtundation, rotating vertigo sensation with episodes lasting no more than 10 seconds related to neck movements, associated with cervicalgia and moderate occipital headache; on examination, normal gait, negative Romberg, normal cranial nerves, cervical spine with complete movements and absence of paravertebral muscle contractures. Simple radiographs were requested, which showed: posterior arch of the atlas absence, posterior tubercle persistence; lateral mass asymmetry, C4/C5 anterolisthesis, the cervical lordosis inverted, dynamic projections and tomography corroborated diagnosis, and the patient was referred to neurosurgery for spondylolisthesis management.  Conclusion:  Congenital anomalies of the atlas can be confused with Jefferson&#8217;s fracture in the emergency services.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Anomalías congénitas del atlas]]></kwd>
<kwd lng="es"><![CDATA[fractura de Jefferson]]></kwd>
<kwd lng="en"><![CDATA[Congenital anomalies of atlas]]></kwd>
<kwd lng="en"><![CDATA[Jefferson fracture]]></kwd>
</kwd-group>
</article-meta>
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