<?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>2007-4085</journal-id>
<journal-title><![CDATA[Revista mexicana de urología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. urol.]]></abbrev-journal-title>
<issn>2007-4085</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Urología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-40852023000200002</article-id>
<article-id pub-id-type="doi">10.48193/revistamexicanadeurologa.v83i2.1015</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Tumores renales bilaterales: Descripción de características clínico-patológicas de la presentación sincrónica y metacrónica, resultados oncológicos y morbilidad asociada]]></article-title>
<article-title xml:lang="en"><![CDATA[Bilateral renal tumors: Description of clinicopathological characteristics of synchronous and metachronous presentation, oncological results and associated morbidity]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fuentes-Méndez]]></surname>
<given-names><![CDATA[Octavio Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez-Ortiz]]></surname>
<given-names><![CDATA[David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gabilondo-Navarro]]></surname>
<given-names><![CDATA[Fernando Bernardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Covarrubias]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Ciencias Médicas y Nutrición &#8220;Salvador Zubirán&#8221;  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2023</year>
</pub-date>
<volume>83</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-40852023000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-40852023000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-40852023000200002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo:  Describir las características de los tumores renales bilaterales, y su impacto en la función renal postquirúrgica en pacientes de una institución de Ciudad de México.  Métodos:  De marzo 1980 a mayo 2021, 17 pacientes fueron llevados a cirugía por tumores renales bilaterales, 12 fueron sincrónicos y el resto metacrónicos. Se realizó una descripción de las características oncológicas y funcionales.  Resultados:  La edad media fue de 46.9+13.5 años. Cuatro fueron mujeres y trece hombres. El tamaño del &#8220;primer&#8221; tumor fue 4.85+/- 2.59 cm y del &#8220;segundo&#8221; de 5.34+/-3.95 cm. En los tumores sincrónicos se realizaron 9 nefrectomías radicales y 3 parciales para el primer tumor y 2 radicales y 9 parciales para el segundo tumor (1 paciente continúa en vigilancia del segundo tumor). En los metacrónicos se realizaron 5 nefrectomías radicales para el primer tumor, 4 radicales y 1 parcial para el segundo tumor. La concordancia histológica en sincrónicos y metacrónicos fue de 91% y 80%, respectivamente. La TFGe preoperatoria fue 77.53+30.44 (ml/min/1.73 m2) y posoperatoria 46.85+38.34, disminuyendo 35.8% tras segunda cirugía. El seguimiento fue 88.7+/-44.5 meses. Cinco pacientes (29.4%) recurrieron. La supervivencia global y libre de enfermedad fue 67.5 y 43 meses, respectivamente.  Conclusiones:  La concordancia histológica es equiparable a los reportes de la literatura internacional. El deterioro de la TFGe posoperatoria fue más significativo en los tumores metacrónicos donde hubo mayor porcentaje de nefrectomías radicales. Por lo que resalta la importancia de realizar nefrectomías parciales siempre que sea factible.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective:  To describe the characteristics of bilateral renal tumors and its impact on postoperative renal function in patients from an institution in Mexico City.  Methods:  From March 1980 to May 2021, 17 patients underwent surgery for bilateral renal tumors, 12 were synchronous and the rest metachronous. Oncological and functional characteristics were described.  Results:  Mean age was 46.9+/-13.5 years. Four were women and thirteen men. The size of the "first" tumor was 4.85+/-2.59 cm and the "second" was 5.34+/-3.95 cm. In synchronous tumors, 9 radical and 3 partial nephrectomies were performed for the first tumor and 2 radical and 9 partial for the second tumor (1 patient is still on surveillance for the second tumor). In metachronous patients, 5 radical nephrectomies were performed for the first tumor, and 4 radical and 1 partial for the second tumor. The histological concordance in synchronous and metachronous was 91% and 80%, respectively. The preoperative eGFR was 77.53+30.44 (ml/min/1.73 m2) and postoperative 46.85+38.34, decreasing 35.8% after the second surgery. Follow-up was 88.7+/-44.5 months. Five patients (29.4%) recurred. Overall and disease-free survival were 67.5 and 43 months, respectively.  Conclusions:  The histological concordance is in line with previous international reports. Postoperative eGFR decline was more significant in metachronous patients in whom the proportion of radical nephrectomies was higher. Therefore, it highlights the importance of performing partial nephrectomies whenever feasible.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Bilateral renal tumor]]></kwd>
<kwd lng="en"><![CDATA[concordance]]></kwd>
<kwd lng="en"><![CDATA[metachronous tumor]]></kwd>
<kwd lng="en"><![CDATA[synchronous tumor]]></kwd>
<kwd lng="en"><![CDATA[impaired renal function]]></kwd>
<kwd lng="es"><![CDATA[Tumores renales bilaterales, concordancia]]></kwd>
<kwd lng="es"><![CDATA[tumor metacrónico, tumor sincrónico, deterioro de la función renal]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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