<?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>1726-8958</journal-id>
<journal-title><![CDATA[Revista Médica La Paz]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Méd. La Paz]]></abbrev-journal-title>
<issn>1726-8958</issn>
<publisher>
<publisher-name><![CDATA[Colegio Médico de La Paz]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1726-89582024000200036</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[CARCINOMA RENAL DE CÉLULAS CLARAS CON DIFERENCIACIÓN SARCOMATOIDE A PROPÓSITO DE UN CASO]]></article-title>
<article-title xml:lang="en"><![CDATA[CLEAR CELL RENAL CELL CARCINOMA WITH SARCOMATOID DIFFERENTIATION IN A CASE REPORT]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palenque Rocabado]]></surname>
<given-names><![CDATA[Germán]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Obrero N° 6 &#8220;Dr. Jaime Mendoza&#8221; Servicio de Patología ]]></institution>
<addr-line><![CDATA[Sucre ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<volume>30</volume>
<numero>2</numero>
<fpage>36</fpage>
<lpage>40</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_arttext&amp;pid=S1726-89582024000200036&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_abstract&amp;pid=S1726-89582024000200036&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_pdf&amp;pid=S1726-89582024000200036&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Los carcinomas de células renales con patrón sarcomatoide es una entidad infrecuente el carcinoma renal de células claras con diferenciación sarcomatoide. Se presenta un paciente de sexo masculino de 57 años de edad, que acude al servicio de emergencias por presentar una sintomatología de 3 días de evolución y que después de una valoración tanto de los hallazgos clínicos, como de laboratorio y de gabinete se decide realizar una intervención quirúrgica. Después del examen de anatomía patológica se concluye con el diagnóstico de cáncer de riñón Tipo histológico de células claras con extensas áreas de diferenciación sarcomatoide. Grado nuclear 4 de Fuhrman. Es esencial el diagnóstico histológico certero, donde se observó presencia de áreas sarcomatoides, en algunos campos se observó células claras, pero lo que predomina mas es las áreas de necrosis. Siendo que existen entidades patológicas que se debe plantear el diagnóstico diferencial como: fibrohistiocitoma maligno, hemangiopericitoma, fibrosarcoma, angiosarcoma y rabdomiosarcoma pleomórfico, es esencial la complementación con estudios de inmunohistoquimica, que en el presente caso no se realizó en el presente caso no se lo realizo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Renal cell carcinomas with sarcomatoid pattern are a rare entity, olear cell renal cell carcinoma with sarcomatoid differentiation. We present a 57-year-old male patient who went to the emergency service with symptoms that had been developing for 3 days and after evaluating the clinical, laboratory and office findings, it was decided to perform an surgical intervention. After the pathological examination, the diagnosis of kidney cancer was concluded. Histological type of clear cells with extensive areas of sarcomatoid differentiation. Fuhrman nuclear grade 4. An accurate histological diagnosis is essential, where the presence of sarcomatoid areas was observed, in some fields clear cells were observed, but what predominates most are the areas of necrosis. Since there are pathological entities that must be differentially diagnosed, such as: malignant fibrohistiocytoma, hemangiopericytoma, fibrosarcoma, angiosarcoma and pleomorphic rhabdomyosarcoma, it is essential to complement them with immunohistochemistry studies, which were not performed in the present case.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Carcinoma de células claras]]></kwd>
<kwd lng="es"><![CDATA[sarcoma renal]]></kwd>
<kwd lng="es"><![CDATA[cáncer renal]]></kwd>
<kwd lng="en"><![CDATA[Clear cell carcinoma]]></kwd>
<kwd lng="en"><![CDATA[renal sarcoma]]></kwd>
<kwd lng="en"><![CDATA[renal cancer]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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