<?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>S1870-72032021000400544</article-id>
<article-id pub-id-type="doi">10.35366/102543</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Obstrucción de la unión ureteropiélica]]></article-title>
<article-title xml:lang="en"><![CDATA[Ureteropelvic junction (UPJ) obstruction]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chávez Loya]]></surname>
<given-names><![CDATA[Manuel Atocha]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lozano Zalce]]></surname>
<given-names><![CDATA[Horacio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Wyler López]]></surname>
<given-names><![CDATA[Octavio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México  Facultad de Medicina]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México  Facultad de Medicina]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital Angeles Lomas  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>19</volume>
<numero>4</numero>
<fpage>544</fpage>
<lpage>546</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-72032021000400544&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-72032021000400544&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-72032021000400544&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La obstrucción de la unión ureteropiélica (UPJ, por sus siglas en inglés) es la forma más común de obstrucción del tracto urinario en la infancia, puede diagnosticarse de manera prenatal o en la infancia. La hidronefrosis como hallazgo en ultrasonido prenatal es altamente sugestiva del diagnóstico. En infantes los síntomas de infección del tracto urinario son frecuentes, destacan dolor abdominal intermitente en flanco, hematuria y fiebre. Se trata de paciente masculino recién nacido, el ultrasonido prenatal muestra hidronefrosis unilateral, por lo que se practica ultrasonido al nacimiento, observando una marcada pielocaliectasia que termina abruptamente en la unión ureteropiélica, el calibre del uréter distal es normal, hallazgos que prácticamente confirman el diagnóstico en este tipo de pacientes. La ecografía prenatal y postnatal es la herramienta diagnóstica de imagen ideal.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Ureteropyelic junction (UPJ) obstruction is the most common form of urinary tract obstruction in children, it can be diagnosed prenatally or in childhood. Hydronephrosis as a prenatal ultrasound finding is highly suggestive for diagnosis. In infants&#8217; symptoms of urinary tract infection are frequent, highlighting intermittent abdominal pain in the flank, hematuria, and fever. This is a newborn male patient, the prenatal ultrasound showed hydronephrosis, a postnatal ultrasound is performed that reveals a marked pyelocaliectasis that ends abruptly at the ureteropyelic junction (UPJ) and the caliber of the distal ureter is normal, a finding that practically confirms the diagnosis in this type of patients, therefore prenatal and postnatal ultrasound is the ideal diagnostic imaging tool.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Obstrucción de la unión ureteropiélica]]></kwd>
<kwd lng="es"><![CDATA[ureteropielocaliectasia]]></kwd>
<kwd lng="en"><![CDATA[Ureteropelvic junction obstruction (UPJ)]]></kwd>
<kwd lng="en"><![CDATA[pelvocaliectasis]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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