<?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>0121-0793</journal-id>
<journal-title><![CDATA[Iatreia]]></journal-title>
<abbrev-journal-title><![CDATA[Iatreia]]></abbrev-journal-title>
<issn>0121-0793</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Antioquia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0121-07932020000400324</article-id>
<article-id pub-id-type="doi">10.17533/udea.iatreia.55</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Tratamiento con CyberKnife®: descripción de la respuesta y los efectos adversos en las metástasis cerebrales]]></article-title>
<article-title xml:lang="en"><![CDATA[Description of brain metastasis response and adverse effects to CyberKnife® treatment]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Araujo-Reyes]]></surname>
<given-names><![CDATA[Ana Teresa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ascencio-Lancheros]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Londoño-Álvarez]]></surname>
<given-names><![CDATA[Ana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Antioquia  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Neurológico de Colombia  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Neurológico de Colombia  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<volume>33</volume>
<numero>4</numero>
<fpage>324</fpage>
<lpage>332</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0121-07932020000400324&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0121-07932020000400324&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0121-07932020000400324&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción:  la primera causa de muerte por cáncer son las metástasis. La supervivencia media, para pacientes no tratados, es máximo de tres meses, que pueden extenderse de seis a doce con radioterapia y quimioterapia, dependiendo del tumor. La radiocirugía estereotáctica dirige la radiación ionizante a una metástasis guiada por tomografía computarizada o resonancia magnética, reduciendo así la radiación en el tejido normal y los efectos adversos. Su principal objetivo es lograr el control tumoral en los pacientes con oligometástasis.  Métodos:  estudio observacional, retrospectivo, con fuente mixta; se describen los resultados del tratamiento con CyberKnife® en metástasis cerebrales.  Resultados:  se evaluaron 31 pacientes con 62 metástasis, la edad media fue de 54 años y 74,2 % fueron mujeres. El cáncer de pulmón fue el origen más frecuente (54,8 %), La mitad de los casos tenía más de dos metástasis. La ubicación más común fue en los lóbulos frontales (33,9 %), siendo necróticas el 48,4 % de las lesiones. Hubo tratamiento previo en el 69,4 % de los tumores. Hubo radionecrosis en el 19,4 % de las lesiones, edema vasogénico en 77,4 % de ellas y recaída en 59,7 %. Se redujo el tamaño del tumor en el 80,7 % de las lesiones y se alcanzó el control tumoral en el 83,9 % de estas.  Conclusión:  el tratamiento con CyberKnife® logró el control en, por lo menos, cuatro quintas partes de las lesiones, con influencia de la ubicación de las metástasis en el sistema nervioso central y una aceptable prevalencia de la radionecrosis como complicación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[SUMMARY  Background: Cancer &#769;s first cause of death are metastases. Mean survival for untreated patients is 3 months, which can extend to six or twelve months with conventional radiotherapy or chemotherapy, depending on the tumor. Stereotactic radiosurgery is a method which aims an ionizing radiation dose towards an intracranial target, guided by computarized tomography or magnetic resonance, reducing radiation on healthy brain tissue, as well as adverse effects. Its main indication is to achieve tumor control in patients with oligometastases.  Methods:  Retrospective, observational study, with primary and secondary sources for data, for describing results of CyberKnife® treatment.  Results:  Data were available for 31 patients and 62 metastases. Mean age was 54 years, 74,19% were women. Lung cancer was the most frequent primary tumor (54,8%); half of the cases had more than two metastases; most common location was frontal lobes (33,9%), being 48,4% of the tumors morphologically necrotic. There was a previous treatment in 69,4% of the tumors. There was radionecrosis in 19,4% of the metastases, vasogenic edema in 77,4% of them and relapses in 59,7% of the tumors. Tumor size was reduced in 80,7% of the metastases and tumor control was achieved in 83,9% of them.  Conclusions:  CyberKnife® was able to achieve control in at least four fifths of the treated metastases, with a relevant influence of metastases &#769; location in central nervous and an acceptable prevalence of radionecrosis as a complication.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cerebro]]></kwd>
<kwd lng="es"><![CDATA[Metástasis]]></kwd>
<kwd lng="es"><![CDATA[Radiocirugía]]></kwd>
<kwd lng="en"><![CDATA[Cerebrum]]></kwd>
<kwd lng="en"><![CDATA[Metastases]]></kwd>
<kwd lng="en"><![CDATA[Radiosurgery]]></kwd>
</kwd-group>
</article-meta>
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