<?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>0123-9015</journal-id>
<journal-title><![CDATA[Revista Colombiana de Cancerología]]></journal-title>
<abbrev-journal-title><![CDATA[rev.colomb.cancerol.]]></abbrev-journal-title>
<issn>0123-9015</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Cancerología E.S.E.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0123-90152014000100006</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Leiomiosarcoma de la vena cava inferior: reporte de un caso y revision de la literatura]]></article-title>
<article-title xml:lang="en"><![CDATA[Leiomyosarcoma of the inferior vena cava: a case report and review of the literature]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[Mauricio]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Messa]]></surname>
<given-names><![CDATA[Oscar]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ríos]]></surname>
<given-names><![CDATA[Diana]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López]]></surname>
<given-names><![CDATA[Hector]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Canedo]]></surname>
<given-names><![CDATA[Javier]]></given-names>
</name>
<xref ref-type="aff" rid="A05"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Instituto Nacional de Cancerología  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Instituto Nacional de Cancerología  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Instituto Nacional de Cancerología  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A04">
<institution><![CDATA[,Instituto Nacional de Cancerología  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A05">
<institution><![CDATA[,Instituto Nacional de Cancerología  ]]></institution>
<addr-line><![CDATA[Cartagena ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>01</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>01</month>
<year>2014</year>
</pub-date>
<volume>18</volume>
<numero>1</numero>
<fpage>41</fpage>
<lpage>45</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0123-90152014000100006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0123-90152014000100006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0123-90152014000100006&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Los sarcomas originados en las paredes de los grandes vasos son tumores de escasa presentación. El leiomiosarcoma de la vena cava es una enfermedad compleja que requiere ser manejado por un grupo multidisciplinario. Su tratamiento es quirúrgico. Poco se conoce de sus resultados oncológicos. Se presenta el caso de una paciente de 56 años, con diagnóstico de leiomiosarcoma de la vena cava inferior, su evaluación, manejo quirúrgico y seguimiento a corto plazo. Se hace una revisión de la literatura existente hasta la fecha, evaluando además la fisiopatología y la necesidad de reconstruir la vena cava inferior.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Sarcomas Sarcomas originating in the walls of the large vessels are tumors of unusual presentation. Leiomyosarcoma of the vena cava is a complex disease that needs to be managed by a multidisciplinary team. Its management is surgical. Little is known of their oncologic results. We report the case of a 56 year-old patient, diagnosed with leiomyosarcoma of the inferior vena cava, including her evaluation, surgical management, and short-term follow-up. An updated review of the literature is presented, along with an evaluation of the pathophysiology and the need for reconstruction of the inferior vena cava.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Neoplasias retroperitoneales]]></kwd>
<kwd lng="es"><![CDATA[Vena cava]]></kwd>
<kwd lng="es"><![CDATA[Sarcoma]]></kwd>
<kwd lng="en"><![CDATA[Retroperitoneal Neoplasms]]></kwd>
<kwd lng="en"><![CDATA[Venae Cavae]]></kwd>
<kwd lng="en"><![CDATA[Sarcoma]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  <font face="verdana" size="2">      <p>REPORTE DE CASO</p>     <p align="center"><font size="4"><b>Leiomiosarcoma de la vena cava inferior: reporte de un caso y revision de la literatura</b></font></p>     <p align="center"><font size="3"><b>Leiomyosarcoma of the inferior vena cava: a case report and review of the literature</b></font></p>     <p align="center">Mauricio Garc&iacute;a<sup>a*</sup>, Oscar Messa<sup>b</sup>, Diana R&iacute;os<sup>c</sup>, Hector L&oacute;pez</b><sup>d</sup> y Javier Canedo<sup>e</sup></p>     <p><i><sup>a</sup> Departamento de Seno y Tejidos Blandos, Instituto Nacional de Cancerolog&iacute;a, Bogot&aacute;, Colombia</i>    <br> <i><sup>b</sup> Departamento de Patolog&iacute;a Oncol&oacute;gica, Instituto Nacional de Cancerolog&iacute;a, Bogot&aacute;, Colombia</i>    <br> <i><sup>c</sup> Fundaci&oacute;n Universitaria de Ciencias de la Salud, Instituto Nacional de Cancerolog&iacute;a, Bogot&aacute;, Colombia</i>    <br> <i><sup>d</sup> Universidad Militar Nueva Granada, Instituto Nacional de Cancerolog&iacute;a, Bogot&aacute;, Colombia</i>    <br> <i><sup>e</sup> Universidad de Cartagena, Cartagena, Colombia</i></p>     ]]></body>
<body><![CDATA[<p><sup>*</sup> Autor de correspondencia.    <br> <i>Correo electr&oacute;nico: </i><a href="mailto:maurogmora@hotmail.com">maurogmora@hotmail.com</a> (M. Garcia).</p>     <p>Recibido el 10 de octubre de 2013; aceptado el 10 de febrero de 2014</p><hr>      <p><b>Resumen </b></p>     <p>Los sarcomas originados en las paredes de los grandes vasos son tumores de escasa presentaci&oacute;n. El leiomiosarcoma de la vena cava es una enfermedad compleja que requiere ser manejado por un grupo multidisciplinario. Su tratamiento es quir&uacute;rgico. Poco se conoce de sus resultados oncol&oacute;gicos. Se presenta el caso de una paciente de 56 a&ntilde;os, con diagn&oacute;stico de leiomiosarcoma de la vena cava inferior, su evaluaci&oacute;n, manejo quir&uacute;rgico y seguimiento a corto plazo. Se hace una revisi&oacute;n de la literatura existente hasta la fecha, evaluando adem&aacute;s la fisiopatolog&iacute;a y la necesidad de reconstruir la vena cava inferior.</p>     <p><b>Palabras Clave</b>: Neoplasias retroperitoneales; Vena cava; Sarcoma.</p> <hr>     <p><b>Abstract </b></p>     <p>Sarcomas Sarcomas originating in the walls of the large vessels are tumors of unusual presentation. Leiomyosarcoma of the vena cava is a complex disease that needs to be managed by a multidisciplinary team. Its management is surgical. Little is known of their oncologic results. We report the case of a 56 year-old patient, diagnosed with leiomyosarcoma of the inferior vena cava, including her evaluation, surgical management, and short-term follow-up.</p>     <p>An updated review of the literature is presented, along with an evaluation of the pathophysiology and the need for reconstruction of the inferior vena cava.</p>     <p><b>Keywords</b>: Retroperitoneal Neoplasms; Venae Cavae; Sarcoma.</p> <hr>     ]]></body>
<body><![CDATA[<p><b><font size="3">Introducci&oacute;n</font></b></p>     <p>Los sarcomas de tejidos blandos del retroperitoneo son tumores poco frecuentes. El leiomiosarcoma de la cava es a&uacute;n m&aacute;s raro, siendo descrito por primera vez por Perl<sup>1</sup>. La cirug&iacute;a es el principal manejo de estos pacientes, sin que haya un consenso sobre la necesidad de reconstruir la vena cava inferior (VCI) luego de su resecci&oacute;n<sup>2</sup>. Por ser tumores de alto grado, a menudo se requiere el uso de radioterapia y terapia sist&eacute;mica con quimioterapia, con beneficios limitados<sup>3</sup>.</p>     <p>Hasta la fecha, se han reportado menos de 300 casos en la literatura mundial<sup>3</sup>. Dada la baja incidencia, la agresividad de la enfermedad y la dificultad en su abordaje terap&eacute;utico, comentamos el caso de una paciente manejada en el Instituto Nacional de Cancerolog&iacute;a en 2013 y revisamos la literatura referente a esto.</p>     <p><b><font size="3">Descripci&oacute;n del caso cl&iacute;nico</font></b></p>     <p>Se trata de una paciente femenina de 56 a&ntilde;os con diagn&oacute;stico de leiomiosarcoma retroperitoneal realizado en noviembre de 2012 (<a href="#f1">fig. 1</a>). Presentaba dolor abdominal generalizado de predominio en hemiabdomen derecho de intensidad 9/10, asociado a n&aacute;useas y emesis ocasional.</p>     <p align="center"><a name="f1"></a><img src="img/revistas/rcc/v18n1/v18n1a06f1.jpg"></p>     <p>Fue valorada por una junta multidisplinaria extrainstitucional quien consider&oacute; que el tumor era irresecable, por lo que se inici&oacute; quimioterapia con ifosfamida + doxorrubicina en febrero de 2013, por 2 ciclos. Remiten al Instituto Nacional de Cancerolog&iacute;a para realizar radioterapia con intenci&oacute;n paliativa.</p>     <p>Fue valorada por el Servicio de Seno y Tejidos Blandos de la Instituci&oacute;n, en marzo de 2013, cuando se consider&oacute; que la paciente se beneficiaba de manejo quir&uacute;rgico en conjunto con cirug&iacute;a vascular.</p>     <p>Fue llevada a cirug&iacute;a en mayo de 2013, donde se encontr&oacute; un tumor retroperitoneal que compromet&iacute;a el hilio renal derecho y la vena cava, de 15 x 7 cm aproximadamente. Se realiz&oacute; resecci&oacute;n del tumor retroperitoneal, nefrectom&iacute;a derecha, ureterectom&iacute;a derecha y ligadura de vena cava por encima de las renales (<a href="#f2">fig. 2</a>). Durante el procedimiento, la paciente present&oacute; inestabilidad hemodin&aacute;mica, por lo cual se dej&oacute; con empaquetamiento abdominal y no se realiz&oacute; ning&uacute;n procedimiento vascular adicional.</p>     <p align="center"><a name="f2"></a><img src="img/revistas/rcc/v18n1/v18n1a06f2.jpg"></p>     ]]></body>
<body><![CDATA[<p>La paciente present&oacute; una adecuada evoluci&oacute;n postoperatoria, inicialmente en la unidad de cuidados intensivos, con estancia hospitalaria total de 7 d&iacute;as. No se realiz&oacute; reconstrucci&oacute;n de la vena cava ni ning&uacute;n otro procedimiento vascular en el postoperatorio, dado que la paciente evolucion&oacute; con estabilidad hemodin&aacute;mica, edema leve de las extremidades, y no present&oacute; una alteraci&oacute;n significativa de la funci&oacute;n renal (el mayor valor postoperatorio de creatinina s&eacute;rica fue de 1,23 mg/dl al segundo d&iacute;a, con normalizaci&oacute;n al tercer d&iacute;a, cuando present&oacute; un valor de 1,16 mg/dl).</p>     <p>En el estudio patol&oacute;gico, en la macroscop&iacute;a (<a href="#f3">fig. 3</a>), se recibi&oacute; un tumor s&oacute;lido gris homog&eacute;neo de 10 x 7 cm; dicho tumor se encontraba adherido a la vena cava provocando protrusi&oacute;n endoluminal. En el estudio microsc&oacute;pico se observ&oacute; un sarcoma fusocelular con &aacute;reas hipercelulares con atipia, mitosis y necrosis (<a href="#f4">fig. 4</a>). El estudio de inmunohistoqu&iacute;mica (<a href="#f5">fig. 5</a>) fue positivo para desmina, Hcaldesm&oacute;n, AML y CD99 con Ki67 de 60% y negatividad para miogenina, DOG1, CD57, CD31, mioglobina, CD34, CD117 y EMA. La creatitina (AE1/AE3) y el S100 fueron positivos focales<sup>4</sup>. El diagn&oacute;stico definitivo fue leiomiosarcoma grado III, con m&aacute;rgenes libres de tumor.</p>     <p align="center"><a name="f3"></a><img src="img/revistas/rcc/v18n1/v18n1a06f3.jpg"></p>     <p align="center"><a name="f4"></a><img src="img/revistas/rcc/v18n1/v18n1a06f4.jpg"></p>     <p align="center"><a name="f5"></a><img src="img/revistas/rcc/v18n1/v18n1a06f5.jpg"></p>      <p>Hasta la fecha, la paciente acude a controles sin comorbilidad importante, con m&iacute;nimo edema de miembros inferiores.</p>     <p>Para la realizaci&oacute;n de este manuscrito, se obtuvo consentimiento informado de la paciente y se tomaron todas las precauciones necesarias para conservar su confidencialidad.</p>     <p><b><font size="3">Discusi&oacute;n</font></b></p>     <p>Los sarcomas de tejidos blandos representan el 1% de todas las neoplasias<sup>5</sup>. Los leiomiosarcomas representan el 0,5% de los sarcomas de tejidos blandos. Los sarcomas primarios de la VCI son infrecuentes, siendo los leiomiosarcomas el 95% de estos tumores<sup>6,7</sup>.</p>     <p>Los leiomiosarcomas son tumores de origen mesenquimal que se desarrollan a partir de las fibras musculares lisas de la t&uacute;nica media. La primera intervenci&oacute;n quir&uacute;rgica fue en 1928 por Mechior<sup>1,8</sup>.</p>     ]]></body>
<body><![CDATA[<p>Tienen un crecimiento lento y pueden permanecer asintom&aacute;ticos por mucho tiempo, lo que retrasa el diagn&oacute;stico y determina un peor pron&oacute;stico<sup>9</sup>.</p>     <p>La clasificaci&oacute;n m&aacute;s usada es de acuerdo con su localizaci&oacute;n, en la que se divide la VCI en 3 segmentos<sup>9-12</sup>:</p> <ul>    <li>Segmento I (bajo): est&aacute; por debajo de las venas renales, se presenta en el 36% de los casos.</li>     <li>Segmento II (medio): entre las venas hep&aacute;ticas y las venas renales son el 44% de los casos. Son de mejor pron&oacute;stico.</li>     <li>Segmento III (superior): desde la aur&iacute;cula derecha a las venas hep&aacute;ticas son el 20% de los casos.</li>    </ul>     <p>El caso de nuestra paciente se clasifica como un leiomiosarcoma ubicado en el segmento medio de la vena cava. Esta localizaci&oacute;n nos enfrenta a una mayor posibilidad de injuria renal, la cual en esta paciente no se dio, probablemente por la extensa circulaci&oacute;n retroperitoneal, tal como se comentar&aacute; m&aacute;s adelante.</p>     <p>El &uacute;nico tratamiento con intenci&oacute;n curativa de estos pacientes es la resecci&oacute;n quir&uacute;rgica con m&aacute;rgenes negativos, de hecho es el &uacute;nico tratamiento que mejora la supervivencia. Esta est&aacute; relacionada con la posibilidad de alcanzar m&aacute;rgenes negativos, siendo a 5 a&ntilde;os del 0% con m&aacute;rgenes positivos, y del 68% con m&aacute;rgenes negativos<sup>7,10,13</sup>. El tipo de cirug&iacute;a que se ha de realizar depende de la localizaci&oacute;n:</p> <ul>    <li>Segmento I: resecci&oacute;n total del tumor y de la porci&oacute;n de la VCI comprometida, con reconstrucci&oacute;n vascular<sup>14</sup>. Si la VCI est&aacute; cr&oacute;nicamente ocluida, con gran circulaci&oacute;n colateral y sin comprometer la vena renal, puede ser ligada sin grandes repercusiones<sup>13</sup>.</li>     <li>Segmento II: la restauraci&oacute;n del flujo renal debe ser considerada. La vena renal izquierda puede ser ligada debido al flujo colateral desde las venas gonadales, adrenales y lumbares. El flujo desde la vena renal derecha puede ser preservado, realizando reimplantaci&oacute;n, interposici&oacute;n, reconstrucci&oacute;n usando la vena gonadal o autotrasplante de ri&ntilde;&oacute;n a la fosa il&iacute;aca derecha<sup>15,16</sup>.</li>     ]]></body>
<body><![CDATA[<li>Segmento III: se han utilizado varias t&eacute;cnicas como: exclusi&oacute;n vascular total del h&iacute;gado, <i>shunt </i>veno-venosos, <i>bypass </i>cardiopulmonar, detenci&oacute;n circulatoria con hipotermia profunda, utilizaci&oacute;n de politetrafluoroetileno y creaci&oacute;n de f&iacute;stulas arteriovenosas. Requieren procedimientos to-racoabdominales o por 2 v&iacute;as con esternotom&iacute;a y laparotom&iacute;a, con alta morbimortalidad<sup>17</sup>.</li>    </ul>     <p>Hasta el momento, en la literatura no es constante la necesidad de reconstruir la VCI, dado que cuando esta se ocluye cr&oacute;nicamente puede derivarse el flujo de este vaso a trav&eacute;s de circulaci&oacute;n colateral. Esta se da seg&uacute;n el segmento de vena cava que haya sido ligado. As&iacute;, cuando se realiza una ligadura por encima de las venas renales, la ruta de circulaci&oacute;n colateral se lleva a cabo por las venas capsular renal, lumbares, adrenales, vertebrales, ileolumbar, fr&eacute;nica inferior, diafragm&aacute;tica, hemi&aacute;cigos, &aacute;cigos y vena cava superior<sup>18,19</sup>. Cuando la ligadura se realiza por debajo de las venas renales, generalmente se produce edema de los miembros inferiores<sup>3,20</sup>, y su circulaci&oacute;n colateral depende de las venas: lumbar ascendente y segmentaria; vertebral, intervertebral y espinales; &aacute;cigos y hemi&aacute;cigos; epig&aacute;stricas y mamaria interna y capsulares renales, tal como probablemente sucedi&oacute; en nuestra paciente.</p>     <p>Histopatol&oacute;gicamente, los sarcomas int&iacute;males por definici&oacute;n de la Organizaci&oacute;n Mundial de la Salud (OMS, 2012), corresponden a neoplasias malignas originadas en los grandes vasos sangu&iacute;neos tanto sist&eacute;micos como de la circulaci&oacute;n pulmonar<sup>21,22</sup>; como criterio diagn&oacute;stico de dicha entidad, se define el &quot;predominante crecimiento intraluminal&quot;; estos tumores cl&aacute;sicamente corresponden a sarcomas de alto grado, pobremente diferenciados, positivos para desmina y actina, y la mayor&iacute;a descritos en vasos pulmonares. El pron&oacute;stico es pobre, con una sobrevida de hasta 13 meses.</p>     <p>Gen&eacute;ticamente, se han demostrado alteraciones en la regi&oacute;n 12q12-15 (genes CDK4, TSPAN32, MDM2, GLMI Y4Q2) con an&aacute;lisis de FISH que han revelado amplificaciones de PDGFRA Y Kit (CD117); se han encontrado amplificaciones de PDGFRA hasta el 81% de dichos tumores en an&aacute;lisis hechos por FISH<sup>23</sup>. En el Servicio de Patolog&iacute;a del Instituto Nacional de Cancerolog&iacute;a, se realizaron en este tumor estudios de FISH para FIPL1L-PDGFRA en la regi&oacute;n cromos&oacute;mica 4q12, donde analizamos 200 n&uacute;cleos sin encontrar alteraci&oacute;n; en un 30% de los n&uacute;cleos evaluados se observ&oacute; tendencia a la triploid&iacute;a.</p>     <p>Si bien nuestro caso cumple algunos criterios de los descritos para sarcoma intimal, como crecimiento endoluminal, origen en pared muscular, morfolog&iacute;a fusocelular y alto grado de malignidad, la localizaci&oacute;n en la vena cava y la clara positividad por inmunohistoqu&iacute;mica para desmina y H-caldesm&oacute;n aclaran el origen en m&uacute;sculo liso, y favorecen el diagn&oacute;stico de leiomiosarcoma. Dicha entidad esta soportada en varias publicaciones ya descritas<sup>24,25</sup>.</p>     <p>Hay poca informaci&oacute;n en la literatura con respecto al pron&oacute;stico preciso de los pacientes con leiomiosarcoma de la VIC. En general, es pobre.</p>     <p>En una serie publicada por Jason et al., en 2005, en un centro con experiencia y manejo multidisciplinario, reportan una mediana de supervivencia de 60 meses, con una supervivencia global y libre de enfermedad a 5 a&ntilde;os del 31% para cada uno<sup>3</sup>.</p>     <p>En otro trabajo publicado por Mingoli et al., luego de la resecci&oacute;n curativa del tumor, se reporta una tasa de recurrencia tan alta como del 57%, y una supervivencia a 5 a&ntilde;os del 50%<sup>26,27</sup>. Hasta un cuarto de las recurrencias son locales<sup>28</sup>. La enfermedad metast&aacute;sica es m&aacute;s com&uacute;n a h&iacute;gado y pulm&oacute;n<sup>28</sup>.</p>     <p>El tratamiento adyuvante con radioterapia y quimioterapia no ha demostrado impacto en la mejor&iacute;a de la supervivencia de estos pacientes<sup>27,28</sup>.</p>     ]]></body>
<body><![CDATA[<p><b><font size="3">Conflicto de intereses</font></b></p>     <p>Los autores declaran que no existe ning&uacute;n conflicto de intereses.</p> <hr>     <p><b><font size="3">Bibliograf&iacute;a</font></b></p>     <!-- ref --><p>1.  Perl L, Virchow R. Ein fall von sarkom der vena cava inferior. Virchows Archiv. 1871;53:378-83.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000066&pid=S0123-9015201400010000600001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>     <!-- ref --><p>2.  Daylami R, Amiri A, Goldsmith B, Troppmann C, Schneider PD, Khatri VP. Inferior vena cava leiomyosarcoma: is reconstruction necessary after resection? Journal of the American College of Surgeons. 2010;210:185-90.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000068&pid=S0123-9015201400010000600002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>     <!-- ref --><p>3.  Jason D, Kimberly H, John H, Thomas M, Levine EA, Perry S. Leiomyosarcoma of the inferior vena cava: surgical management and clinical results. The American surgeon. 2005; 71:497-501.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000070&pid=S0123-9015201400010000600003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>     <!-- ref --><p>4.  Vasuri F, Resta L, Fittipaldi S, Malvi D, Pasquinelli G. 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Journal of the American College of Surgeons. 2003;197:575-9.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000078&pid=S0123-9015201400010000600007&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>     <!-- ref --><p>8.  Melchior E. Sarkom der Vena cava inferior. Langenbeck's Archives of Surgery. 1928;213:135-40.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000080&pid=S0123-9015201400010000600008&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>     <!-- ref --><p>9.  Mingoli A, Cavallaro A, Sapienza P, Di Marzo L, Feldhaus RJ, Cavallari N. International registry of inferior vena cava leiomyosarcoma: analysis of a world series on 218 patients. 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European Journal of Surgical Oncology (EJSO). 2008;34:831-5.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000088&pid=S0123-9015201400010000600012&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>     <!-- ref --><p>13.  Hines OJ, Nelson S, Quinones G, Ç&Eacute;Baldrich WJ, Eilber FR. Leiomyosarcoma of the inferior vena cava. Cancer. 1999;85: 1077-83.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000090&pid=S0123-9015201400010000600013&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>     <!-- ref --><p>14.  Fiore M, Colombo C, Locati P, Berselli M, Radaelli S, Morosi C, et al. 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