<?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>S2007-40852020000500008</article-id>
<article-id pub-id-type="doi">10.48193/revistamexicanadeurologa.v80i5.543</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Carcinoma renal sarcomatoide con múltiples metástasis cutáneas]]></article-title>
<article-title xml:lang="en"><![CDATA[Sarcomatoid renal cancer with multiple cutaneous metastases]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Ramírez]]></surname>
<given-names><![CDATA[Diana Carolina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ricardez-Espinosa]]></surname>
<given-names><![CDATA[Abel Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez-López]]></surname>
<given-names><![CDATA[Luis Alfredo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velázquez-Méndez]]></surname>
<given-names><![CDATA[Alejandro Anastacio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sandoval-Téllez]]></surname>
<given-names><![CDATA[Jorge Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Hospital de Especialidades No. 14 "Adolfo Ruiz Cortines" ]]></institution>
<addr-line><![CDATA[ Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Hospital General de Zona Número 76 ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2020</year>
</pub-date>
<volume>80</volume>
<numero>5</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-40852020000500008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-40852020000500008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-40852020000500008&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Descripción del caso clínico: Masculino de 47 años que presentó lesiones cutáneas nodulares rojo-violáceas en cara, cuero cabelludo y manos, biopsia con reporte de metástasis de tumor renal. Estado general conservado, masa palpable abdominal y microhematuria. Tomografía reportó tumor renal derecho infiltrando grasa perirrenal. Se realizó nefrectomía radical derecha, reporte histopatológico tumor de células claras con 60% de componente sarcomatoide. Inició sunitinib con involución de las lesiones cutáneas, tras 2 semanas de intermitencia presentó recurrencia modificándose la dosis. Tres meses después presentó actividad metastásica cerebral, hepática y ósea evolucionando tórpidamente, falleciendo a cinco meses del diagnóstico.  Relevancia: Particularmente nuestro caso no solo presenta una forma infrecuente de metástasis de cáncer renal recidivante a pesar del tratamiento con inhibidores de la tirosincinasa, sino también diferenciación sarcomatoide, una variante muy agresiva de cáncer renal.  Implicaciones clínicas: Las metastásis cutáneas de cáncer renal presentan una incidencia aproximada de 3%, si bien no es de buen pronóstico encontrarlas, su detección oportuna es primordial en todo paciente.  Conclusiones: El carcinoma renal sarcomatoide es un tumor raro y de pronóstico sombrío, generalmente asociado a metastásis a distancia. Es necesaria la valoración cutánea completa de todo paciente diagnosticado con cáncer renal para el adecuado estadiaje y tratamiento.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Clinical case description: A 47-year-old man presented with violet-red nodular cutaneous lesions on the face, scalp, and hands. Biopsy report stated metastatic kidney tumor. Physical examination revealed fair general status and a palpable abdominal mass. Urinalysis showed microhematuria. Tomography identified a right kidney tumor infiltrating the perirenal fat. Right radical nephrectomy was performed, and the histopathologic study described a clear cell renal cell tumor, with a 60% sarcomatoid component. Sunitinib was begun, resulting in cutaneous lesion involution. During two weeks of intermittent therapy, the lesions reappeared, and the dose was modified. Three months later, the patient presented with brain, liver, and bone metastases. After showing no improvement, the patient died five months after diagnosis.  Relevance: Not only was our case one of a rare form of metastatic kidney cancer that recurred despite treatment with tyrosine kinase therapy, the tumor also had sarcomatoid differentiation, a very aggressive variant of kidney cancer.  Clinical implications: Cutaneous metastases from kidney cancer have an incidence of approximately 3%. Even though their prognosis is not good, opportune detection is essential for the patient.  Conclusions: Sarcomatoid renal cancer is a rare tumor with a poor prognosis and is generally associated with distant metastasis. Every patient diagnosed with kidney cancer should undergo a comprehensive skin assessment, for adequate staging and treatment.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Renal cancer]]></kwd>
<kwd lng="en"><![CDATA[Sarcomatoid]]></kwd>
<kwd lng="en"><![CDATA[Cutaneous metastases]]></kwd>
<kwd lng="en"><![CDATA[Sarcomatoid factor]]></kwd>
<kwd lng="en"><![CDATA[Prognosis]]></kwd>
<kwd lng="es"><![CDATA[Cáncer renal]]></kwd>
<kwd lng="es"><![CDATA[sarcomatoide]]></kwd>
<kwd lng="es"><![CDATA[metástasis cutáneas]]></kwd>
<kwd lng="es"><![CDATA[factor sarcomatoide]]></kwd>
<kwd lng="es"><![CDATA[pronóstico]]></kwd>
</kwd-group>
</article-meta>
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