<?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>2011-7582</journal-id>
<journal-title><![CDATA[Revista Colombiana de Cirugía]]></journal-title>
<abbrev-journal-title><![CDATA[rev. colomb. cir.]]></abbrev-journal-title>
<issn>2011-7582</issn>
<publisher>
<publisher-name><![CDATA[Asociación Colombiana de Cirugía]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2011-75822011000300009</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Lipoma intrapericárdico gigante silente]]></article-title>
<article-title xml:lang="en"><![CDATA[Silent giant intracardiac lipoma]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valencia]]></surname>
<given-names><![CDATA[Álex]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lombo]]></surname>
<given-names><![CDATA[Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Correa]]></surname>
<given-names><![CDATA[Juan]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Pontificia Universidad Javeriana Departamento de Cirugía Cardiovascular ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Hospital San Ignacio  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Hospital San Ignacio Departamento de Cirugía Cardiovascular ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2011</year>
</pub-date>
<volume>26</volume>
<numero>3</numero>
<fpage>222</fpage>
<lpage>225</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S2011-75822011000300009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S2011-75822011000300009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S2011-75822011000300009&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Los tumores benignos cardiacos son una entidad con diferentes características según su localización y compromiso. En este artículo se describe el caso de una paciente con un lipoma gigante con síntomas insidiosos y silentes, que hacen de ésta una enfermedad de larga data y de difícil diagnóstico.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Cardiac tumors are benign entities with different with characteristics depending on their location and degree of involvement. We report a patient with a giant lipoma, with insidious and silent symptoms that make this a longstanding disease of difficult diagnosis.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[lipoma]]></kwd>
<kwd lng="es"><![CDATA[pericardio]]></kwd>
<kwd lng="es"><![CDATA[neoplasias del mediastino]]></kwd>
<kwd lng="es"><![CDATA[enfermedades cardiovasculares]]></kwd>
<kwd lng="es"><![CDATA[procedimientos quirúrgicos cardiovasculares]]></kwd>
<kwd lng="en"><![CDATA[lipoma]]></kwd>
<kwd lng="en"><![CDATA[pericardium]]></kwd>
<kwd lng="en"><![CDATA[mediastinal neoplasms]]></kwd>
<kwd lng="en"><![CDATA[cardiovascular diseases]]></kwd>
<kwd lng="en"><![CDATA[cardiovascular surgical procedures]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  <font size="2" face="Verdana">  <h3>    <center>Lipoma intraperic&aacute;rdico gigante silente</center></h3> <h4>    <center>Silent giant intracardiac lipoma </center></h4> </font>    <p>    <center> <font size="2" face="Verdana">&Aacute;lex Valencia<sup>1</sup>, Miguel Lombo<sup>2</sup>, Juan Correa<sup>3</sup> </font></center></p><font size="2" face="Verdana">     <p><sup>1 </sup>Fellow, Departamento de Cirug&iacute;a Cardiovascular, Pontificia Universidad Javeriana, Bogot&aacute;, D.C., Colombia.    <br> <sup>2</sup> Cirujano cardiovascular, Hospital San Ignacio, Pontificia Universidad Javeriana, Bogot&aacute;, D.C., Colombia.    <br> <sup>3 </sup>Director, Departamento de Cirug&iacute;a Cardiovascular, Hospital San Ignacio, Pontificia Universidad Javeriana, Bogot&aacute;, D.C., Colombia.</p>     <p><b>Correspondencia</b>: Alex Valencia, MD Correo electr&oacute;nico: <a href="mailto:alexvalenciarivas@gmail.com">alexvalenciarivas@gmail.com</a> Bogot&aacute;, Colombia.</p>     <p>Fecha de recibido: 7 de marzo de 2011 Fecha de aprobaci&oacute;n: 6 de abril de 2011 </p> <hr size=1> <h4> Resumen </h4>     ]]></body>
<body><![CDATA[<p>Los tumores benignos cardiacos son una entidad con diferentes caracter&iacute;sticas seg&uacute;n su localizaci&oacute;n y compromiso. En este art&iacute;culo se describe el caso de una paciente con un lipoma gigante con s&iacute;ntomas insidiosos y silentes, que hacen de &eacute;sta una enfermedad de larga data y de dif&iacute;cil diagn&oacute;stico. </p>     <p>Palabras clave: lipoma; pericardio; neoplasias del mediastino; enfermedades cardiovasculares; procedimientos  quir&uacute;rgicos cardiovasculares.</p> <hr size=1> <h4>Abstract </h4>     <p>Cardiac tumors are benign entities with different with characteristics depending on their location and degree of involvement. We report a patient with a giant lipoma, with insidious and silent symptoms that make this a longstanding disease of difficult diagnosis. </p>     <p>Key words: lipoma; pericardium; mediastinal neoplasms; cardiovascular diseases; cardiovascular surgical procedures.</p> <hr size=1> <h4>Introducci&oacute;n </h4>     <p>Los tumores cardiacos son una entidad digna de estudio y an&aacute;lisis, pues sus implicaciones anat&oacute;micas y fisiol&oacute;gicas pueden tener consecuencias a corto y largo plazo, con signos y s&iacute;ntomas que pueden llevar hasta la muerte s&uacute;bita. </p>     <p>En este caso se describen los tumores benignos cardiacos, los cuales tienen una incidencia baja y se consideran raros <sup>1-2</sup>. Sin embargo, entre ellos, los lipomas son unos de los tumores benignos cardiacos m&aacute;s comunes y corresponden a cerca de 10 % de todos los tumores cardiacos primarios <sup>3-7</sup>. </p> <h4>Presentaci&oacute;n del caso </h4>     <p>Se trata de un paciente de sexo femenino de 63 a&ntilde;os de edad, con un cuadro cl&iacute;nico de seis meses de evoluci&oacute;n, aproximadamente, de sensaci&oacute;n de fatiga progresiva asociada con la actividad f&iacute;sica, dolor tor&aacute;cico ocasional de intensidad leve con predominio en la regi&oacute;n precordial y palpitaciones eventuales. </p>     <p>Durante el estudio de rutina se tom&oacute; una radiograf&iacute;a de t&oacute;rax (<a href="#figura1">figura 1)</a> en la que se observ&oacute; aumento del tama&ntilde;o de la silueta cardiaca que podr&iacute;a corresponder a una masa intraperic&aacute;rdica o extraperic&aacute;rdica, por lo cual se hicieron estudios complementarios.</p>     <p>        <center>     <a name="figura1"></a>    ]]></body>
<body><![CDATA[<br>     <img src="img/revistas/rcci/v26n3/v26n3a9f1.gif">   </center> </p>     <p> La tomograf&iacute;a computadorizada demostr&oacute; la presencia de una masa extracardiaca e intraperic&aacute;rdica, con densidad de tejido graso, que desplazaba el coraz&oacute;n hacia la derecha sin infiltrarlo y compromet&iacute;a su cara lateral derecha anterior y, especialmente, la cara lateral izquierda (<a href="#figura2">figura 2</a>). </p>     <p>        <center>     <a name="figura2"></a>    <br>     <img src="img/revistas/rcci/v26n3/v26n3a9f2.gif">   </center> </p>     <p>Se someti&oacute; a cirug&iacute;a con abordaje por esternotom&iacute;a media, se identific&oacute; el pericardio sano y abombado, y se encontr&oacute; una masa intraperic&aacute;rdica, lisa y amarilla (<a href="#figura3">figura 3</a>), que envolv&iacute;a la mayor parte de la superficie del coraz&oacute;n sin comprometerlo, con un peque&ntilde;o ped&iacute;culo ubicado en las venas pulmonares izquierdas (<a href="#figura4">figura 4</a>). Se logr&oacute; retirar completamente el tumor, el cual pes&oacute; 850 g y midi&oacute; 30 x 20 x 15 cm (<a href="#figura5">figura 5</a>).</p>     <p>        <center>     <a name="figura3"></a>    <br>     <img src="img/revistas/rcci/v26n3/v26n3a9f3.gif">   </center> </p>     <p>        ]]></body>
<body><![CDATA[<center>     <a name="figura4"></a>    <br>     <img src="img/revistas/rcci/v26n3/v26n3a9f4.gif">   </center> </p>     <p>        <center>     <a name="figura5"></a>    <br>     <img src="img/revistas/rcci/v26n3/v26n3a9f5.gif">   </center> </p>     <p>En el estudio de histopatolog&iacute;a se report&oacute; un lipoma con c&eacute;lulas maduras. </p>     <p>En el posoperatorio inmediato la paciente evolucion&oacute; sin complicaciones y se logr&oacute; dar de alta en forma temprana, sin que presentara ning&uacute;n s&iacute;ntoma en el manejo ambulatorio. </p> <h4>Discusi&oacute;n </h4>     <p>Los tumores primarios cardiacos pueden dividirse seg&uacute;n su origen, en endoc&aacute;rdico, peric&aacute;rdico o epic&aacute;rdico y producen diferentes sintomas. </p>     <p>Los tumores lipomatosos benignos se dividen en lipomas y en hipertrofia lipomatosa, que para efecto de tratamiento no tiene ninguna diferenciaci&oacute;n 4,8.</p>     <p>Los s&iacute;ntomas son insidiosos y pueden pasar desapercibidos durante mucho tiempo; entre los principales s&iacute;ntomas descritos se encuentra el dolor de pecho, la fatiga, el malestar, las palpitaciones, la disnea, el s&iacute;ncope, la arritmia, la angina por compromiso de arterias coronarias e, incluso, se han descrito casos de muerte s&uacute;bita <sup>7,9-12</sup>. </p>     ]]></body>
<body><![CDATA[<p>Los lipomas de origen endoc&aacute;rdico pueden producir falla cardiaca por alteraci&oacute;n de la mec&aacute;nica ventricular, a diferencia de los lipomas subendoc&aacute;rdicos, que pueden ser silentes y ser un hallazgo incidental <sup>13</sup>. </p>     <p>Tambi&eacute;n, se han descrito lipomas intramioc&aacute;rdicos, los cuales tienen menor incidencia, se asocian con alteraci&oacute;n del sistema de conducci&oacute;n y pueden producir arritmias <sup>4,7,14-16</sup>. </p>     <p>En este grupo de pacientes se han descrito incidencias de hasta el 24% en pacientes pedi&aacute;tricos con arritmia cardiaca asociado a masas ventriculares, dentro de estas arritmias la taquicardia ventricular es una de las principales <sup>17,18</sup>.</p>     <p> Entre los diferentes m&eacute;todos de diagn&oacute;stico para los lipomas cardiacos, que permiten identificar su ubicaci&oacute;n, relaci&oacute;n con el coraz&oacute;n y su diferenciaci&oacute;n con neoplasias malignas, se encuentran la radiograf&iacute;a de t&oacute;rax, el ecocardiograma transtor&aacute;cico, el ecocardiograma transesof&aacute;gico, la tomograf&iacute;a computadorizada y la resonancia magn&eacute;tica<sup> 9,19,20</sup>.</p>     <p> La tomograf&iacute;a computadorizada permite establecer la ubicaci&oacute;n y las caracter&iacute;sticas imaginol&oacute;gicas que los diferencian de otras enfermedades. Sin embargo, la resonancia magn&eacute;tica ha demostrado ser un estudio importante, porque define con mayor detalle las caracter&iacute;sticas de la masa, como su ubicaci&oacute;n y relaci&oacute;n con el coraz&oacute;n, y permite diferenciarlos de enfermedades malignas como el liposarcoma <sup>3,9</sup>. </p>     <p>En la actualidad se describe el ecocardiograma como la piedra angular para el estudio inicial de masas mioc&aacute;rdicas <sup>17</sup>. </p>     <p>Sin embargo con el advenimiento de nuevos m&eacute;todos diagn&oacute;sticos en la actualidad podemos contar con estudios como la Resonancia Nuclear Magn&eacute;tica (RNM) <sup>21</sup> y la Tomograf&iacute;a Axial Computarizada (TAC), que nos permiten identificar con mayor precisi&oacute;n los diferentes l&iacute;mites y bordes de las masas mioc&aacute;rdicas, de esta forma poder planear una cirug&iacute;a con mayor precisi&oacute;n y evitar complicaciones intraoperatorias <sup>22</sup>. </p>     <p>La aproximaci&oacute;n quir&uacute;rgica depende varias variables dentro de las que se encuentran el tama&ntilde;o, la ubicaci&oacute;n de la masa y el compromiso de diferentes cavidades, y de esta aproximaci&oacute;n lograremos determinar el abordaje quir&uacute;rgico <sup>23,24</sup>. </p>     <p>Se han descrito diferentes abordajes como la esternotom&iacute;a, la incisi&oacute;n en concha de almeja (clamshell) o toracotom&iacute;a izquierda o derecha <sup>9,11,25</sup>. </p>     <p>En este caso, la paciente se someti&oacute; a cirug&iacute;a electiva. Se hizo un abordaje quir&uacute;rgico por esternotom&iacute;a, debido a la relaci&oacute;n de la masa con el coraz&oacute;n. Este abordaje nos permiti&oacute; una extirpaci&oacute;n completa, desde su ped&iacute;culo, ubicado en las venas pulmonares derechas, y logrando identificar una resecci&oacute;n completa de la misma. </p>     ]]></body>
<body><![CDATA[<p>En resumen, se describe una enfermedad rara entre los tumores cardiacos, que merece atenci&oacute;n debido a la gran variedad de signos y s&iacute;ntomas que produce y que no permiten un diagn&oacute;stico r&aacute;pido y eficaz para un manejo definitivo, sin embargo con los diferentes m&eacute;todos diagn&oacute;sticos actuales podemos planear de una forma mas acertada los diferentes abordajes quir&uacute;rgicos y evitar posibles complicaciones y recidivas quir&uacute;rgicas <sup>26</sup>.</p> <h4>Referencias </h4>     <!-- ref --><p>1. Auger D, Pressacco J, Marcotte F, Tremblay A, Dore A, Ducharme A. Cardiac masses: an integrative approach using echocardiography and other imaging modalities. 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