<?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>0028-3746</journal-id>
<journal-title><![CDATA[Neumología y cirugía de tórax]]></journal-title>
<abbrev-journal-title><![CDATA[Neumol. cir. torax]]></abbrev-journal-title>
<issn>0028-3746</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Neumología y Cirugía de Tórax; Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas; Sociedad Cubana de Neumología; Sociedad Paraguaya de Neumología; Sociedad Boliviana de Neumología.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0028-37462025000200012</article-id>
<article-id pub-id-type="doi">10.24875/nct.m2500001</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Isomerismo asociado a tumorlet: un caso inusual]]></article-title>
<article-title xml:lang="en"><![CDATA[Bronchial isomerism associated with tumorlet: an unusual case]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Ferman]]></surname>
<given-names><![CDATA[Mónica]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vega-Vivar]]></surname>
<given-names><![CDATA[Raúl D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morales-Gómez]]></surname>
<given-names><![CDATA[José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Zertuche]]></surname>
<given-names><![CDATA[Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Departamento de Cirugía de Tórax Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital General Dr. Manuel Gea González.  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2025</year>
</pub-date>
<volume>84</volume>
<numero>2</numero>
<fpage>154</fpage>
<lpage>157</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0028-37462025000200012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0028-37462025000200012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0028-37462025000200012&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las variantes anatómicas del árbol traqueobronquial son poco comunes. El isomerismo bronquial se refiere a un trastorno de la lateralidad broncopulmonar; el isomerismo bronquial derecho se caracteriza por pulmones trilobulados bilaterales. Esta variante anatómica suele ser asintomática y el cuadro clínico está en función de las malformaciones y alteraciones asociadas. Se han reportado casos de malformaciones traqueobronquiales congénitas con riesgo aumentado para cáncer. Presentamos el caso de una paciente joven con isomerismo bronquial a quien se le realizó lobectomía por bronquiectasias y presencia de tumorlet en el tejido resecado.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Anatomical variants of the tracheobronchial tree are uncommon. Bronchial isomerism refers to a disorder of bronchopulmonary laterality; right-sided bronchial isomerism is characterized by bilateral trilobed lungs. This anatomical variant is usually asymptomatic, and the clinical presentation depends on the associated malformations and alterations. Cases of congenital tracheobronchial malformations with increased risk of cancer have been reported. We present the case of a young patient with bronchial isomerism who underwent lobectomy for bronchiectasis and the presence of a tumorlet in the resected tissue.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Isomerismo bronquial]]></kwd>
<kwd lng="es"><![CDATA[Bronquiectasias]]></kwd>
<kwd lng="es"><![CDATA[Tumorlet]]></kwd>
<kwd lng="en"><![CDATA[Bronchial isomerism]]></kwd>
<kwd lng="en"><![CDATA[Bronchiectasis]]></kwd>
<kwd lng="en"><![CDATA[Tumorlet]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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