<?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>S2007-40852018000500397</article-id>
<article-id pub-id-type="doi">10.24245/revmexurol.v78i5.1954</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Metástasis ósea como manifestación inicial de carcinoma de células renales. Reporte de un caso]]></article-title>
<article-title xml:lang="en"><![CDATA[Bone metastasis as initial presentation of renal cell carcinoma: A case report]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Reynaga]]></surname>
<given-names><![CDATA[Hugo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Komukai]]></surname>
<given-names><![CDATA[Erwin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bárcena-Ugalde]]></surname>
<given-names><![CDATA[Juan Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital de Especialidades Centro Médico Nacional La Raza Antonio Fraga Mouret  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital de Especialidades Centro Médico Nacional La Raza Antonio Fraga Mouret Departamento de Urología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2018</year>
</pub-date>
<volume>78</volume>
<numero>5</numero>
<fpage>397</fpage>
<lpage>401</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-40852018000500397&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-40852018000500397&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-40852018000500397&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  ANTECEDENTES:  El carcinoma de células renales supone 2-3% de las neoplasias malignas en pacientes adultos. En Estados Unidos se reportan 31,000 casos nuevos al año, con mortalidad de 2.3%; es más común en varones que en mujeres (1.5:1). La mayoría de los casos ocurre entre los 50-70 años de edad. Un tercio de los tumores evoluciona metástasis (metástasis sincrónicas) y otro tercio se manifiesta a futuro (metástasis metacrónicas), incluso 20 años después de la nefrectomía.  CASO CLÍNICO:  Paciente masculino de 64 años, con antecedente de tabaquismo intenso, etilismo ocasional; dolor crónico en el primer dedo de la mano izquierda. La tomografía sugirió una tumoración maligna, por lo que se obtuvo una biopsia de la lesión, cuyo reporte histopatológico coincidió con carcinoma de células claras metastásico. El diagnóstico se complementó con la etapificación: tumor renal izquierdo T2b N0 M1, estadio clinico IV. Se efectuó nefrectomía radical izquierda, con resultado histopatológico de carcinoma de células renales variedad de células claras. El seguimiento a dos años no reporta síntomas adicionales y la tomografía no evidencia datos de recurrencia local o a distancia.  CONCLUSIÓN:  En los últimos años, la incidencia de metástasis de carcinoma renal, por orden de aparición, es en pulmón (60%), huesos (20%), hígado (8%), glándulas suprarrenales y cerebro (5%). La radiología ósea no excluye la coexistencia de metástasis. Algunos autores sugieren establecer el diagnóstico temprano de metástasis ósea con gammagrafía versus radiología convencional.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  BACKGROUND:  Renal cell carcinoma accounts for 2-3% of the malignant tumors in adult patients. In the United States, 31,000 new cases are reported annually, with a mortality rate of 2.3%. The disease is more common in men than in women (1.5:1). The majority of cases occur in patients between 50-70 years of age. One-third of the tumors present with metastasis at diagnosis (synchronous metastases) and another third will metastasize in the future (metachronous metastases), even as long as 20 years after nephrectomy.  CLINICAL CASE: A 64-year-old man, with a history of intense smoking and occasional drinking, presented with chronic pain in the index finger of his left hand. A tomography scan suggested a malignant tumor and the lesion was biopsied. The histopathologic report stated metastatic clear cell carcinoma and an abdominopelvic tomography scan identified a clinical stage IV, T2b N0 M1 left kidney tumor. Left radical nephrectomy was performed and the histopathologic result was clear cell renal cell carcinoma. At the follow-up at 2 years, the patient has no additional symptoms and there was no tomographic evidence of local or distant recurrence.  CONCLUSION: In recent years, the incidence of metastasis from renal carcinoma has increased. In order of frequency, metastases to the lung (60%), bone (20%), liver (8%), and adrenal glands and brain (5%) have been reported. Bone radiology does not exclude the coexistence of metastasis. Some authors suggest making early diagnosis of bone metastasis through scintigraphy versus conventional radiology.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Carcinoma de células renales]]></kwd>
<kwd lng="es"><![CDATA[nefrectomía]]></kwd>
<kwd lng="es"><![CDATA[metástasis]]></kwd>
<kwd lng="en"><![CDATA[Renal cell carcinoma]]></kwd>
<kwd lng="en"><![CDATA[Nephrectomy]]></kwd>
<kwd lng="en"><![CDATA[Metastasis]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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