<?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>S2011-75822015000400008</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Hernia del hiato de Winslow]]></article-title>
<article-title xml:lang="en"><![CDATA[Hernia through foramen of Winslow]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cabrera]]></surname>
<given-names><![CDATA[Paulo A]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mosquera]]></surname>
<given-names><![CDATA[Manuel Santiago]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kadamani]]></surname>
<given-names><![CDATA[Akram]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[Gabriel]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[Jorge Hernán]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Fundación Cardioinfantil Servicio de Cirugía General ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Fundación Cardioinfantil Servicio de Cirugía General ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Fundación Cardioinfantil Servicio de Cirugía General ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A04">
<institution><![CDATA[,Universidad de La Sabana Departamento de Cirugía ]]></institution>
<addr-line><![CDATA[Chía ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<volume>30</volume>
<numero>4</numero>
<fpage>306</fpage>
<lpage>310</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S2011-75822015000400008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S2011-75822015000400008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S2011-75822015000400008&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Las hernias internas corresponden de 0,2 a 0,9 % de todos los casos de obstrucción intestinal. De ellas, el 8 % son hernias del hiato de Winslow. Este tipo de hernia se asocia frecuentemente a obstrucción intestinal y a algún grado de isquemia. Su diagnóstico prequirúrgico es difícil y se da en menos del 10 % de los casos. Su manejo es quirúrgico y la mortalidad está alrededor del 50 % cuando existe compromiso vascular. Se han descrito cuatro tipos de hernias del hiato de Winslow, dependiendo del órgano comprometido. Se presenta el caso de una paciente que ingresó al servicio de urgencias con dolor abdominal de inicio súbito, progresivo, asociado a náuseas, emesis y compromiso de su estado general. Fue sometida a laparotomía exploratoria. Se encontró una hernia del hiato de Winslow, con necrosis isquémica del íleon terminal, el ciego y el colon ascendente, por lo cual requirió resección intestinal, con ileostomía y fístula mucosa. Durante el posoperatorio necesitó soporte en la unidad de cuidados intensivos y, posteriormente, en salas de hospitalización, y fue dada de alta una vez su condición clínica se estabilizó.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Internal hernias constitute 0.2% - 0.9% of all cases of intestinal obstruction. Of these, hernias through the foramen of Winslow represent about 8%. This type of hernia is often associated with intestinal obstruction and some degree of ischemia. Preoperative diagnosis is difficult and occurs in less than 10% of cases. Treatment is surgical and mortality rate is about 50% when there is vascular compromise. Four types of hernias through the foramen of Winslow are described depending on the organ involved. We report the case of a 73 year old female who was admitted to the emergency department with sudden progressive abdominal pain associated with nausea, emesis, and systemic compromise evidenced by metabolic acidosis and hyperlactatemia. At exploratory celiotomy a large hernia through the foramen of Winslow with ischemic necrosis of the terminal ileum, cecum and ascending colon was encountered, requiring bowel resection, ileostomy and mucous fistula. The patient required initial support in the ICU and was discharged once the clinical condition was stable.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[hiato de Winslow]]></kwd>
<kwd lng="es"><![CDATA[hernia hiatal]]></kwd>
<kwd lng="es"><![CDATA[hernia abdominal]]></kwd>
<kwd lng="es"><![CDATA[epiplón]]></kwd>
<kwd lng="es"><![CDATA[obstrucción intestinal]]></kwd>
<kwd lng="en"><![CDATA[Winslow hiatus]]></kwd>
<kwd lng="en"><![CDATA[hernia]]></kwd>
<kwd lng="en"><![CDATA[hiatal]]></kwd>
<kwd lng="en"><![CDATA[hernia]]></kwd>
<kwd lng="en"><![CDATA[abdominal]]></kwd>
<kwd lng="en"><![CDATA[omentum]]></kwd>
<kwd lng="en"><![CDATA[intestinal obstruction]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  <font size="2" face="Verdana">     <p>    <center><font size="4" face="Verdana"><b>Hernia del hiato de Winslow</b></font></center></p>     <p>    <center><font size="3" face="Verdana"><b>Hernia through foramen of Winslow</b></font></center></p>     <p>    <center>Paulo A Cabrera<sup>1</sup>, Manuel Santiago Mosquera<sup>2</sup>, Akram Kadamani<sup>1</sup>, Gabriel S&aacute;nchez<sup>3</sup>, Jorge Hern&aacute;n Santos<sup>4</sup></center></p>     <p><sup>1</sup>	M&eacute;dico, cirujano general, Servicio de Cirug&iacute;a General, Fundaci&oacute;n Cardioinfantil, Bogot&aacute;, D.C., Colombia.    <br> <sup>2</sup> 	M&eacute;dico, cirujano gastrointestinal, Servicio de Cirug&iacute;a General, Fundaci&oacute;n Cardioinfantil, Bogot&aacute;, D.C., Colombia.    <br> <sup>3</sup> 	M&eacute;dico, cirujano de cabeza y cuello, Servicio de Cirug&iacute;a General, Fundaci&oacute;n Cardioinfantil, Bogot&aacute;, Colombia.    ]]></body>
<body><![CDATA[<br> <sup>4</sup> 	M&eacute;dico residente, Departamento de Cirug&iacute;a, Universidad de La Sabana, Ch&iacute;a, Colombia.</p>     <p><b>Correspondencia</b>: Paulo Cabrera, MD., Bogot&aacute;, D.C. Correo electr&oacute;nico: <a href="mailto:theepaulo@gmail.com">theepaulo@gmail.com</a></p>     <p>Fecha de recibido: 4 de mayo de 2015. Fecha de aprobaci&oacute;n: 23 de junio de 2015.</p> <hr size="1">     <p> <font size="3" face="Verdana"><b>Resumen</b></font></p>     <p>Las hernias internas corresponden de 0,2 a 0,9 % de todos los casos de obstrucci&oacute;n intestinal. De ellas, el 8 % son hernias del hiato de Winslow. Este tipo de hernia se asocia frecuentemente a obstrucci&oacute;n intestinal y a alg&uacute;n grado de isquemia. Su diagn&oacute;stico prequir&uacute;rgico es dif&iacute;cil y se da en menos del 10 % de los casos. Su manejo es quir&uacute;rgico y la mortalidad est&aacute; alrededor del 50 % cuando existe compromiso vascular. Se han descrito cuatro tipos de hernias del hiato de Winslow, dependiendo del &oacute;rgano comprometido.</p>     <p>Se presenta el caso de una paciente que ingres&oacute; al servicio de urgencias con dolor abdominal de inicio s&uacute;bito, progresivo, asociado a n&aacute;useas, emesis y compromiso de su estado general. Fue sometida a laparotom&iacute;a exploratoria. Se encontr&oacute; una hernia del hiato de Winslow, con necrosis isqu&eacute;mica del &iacute;leon terminal, el ciego y el colon ascendente, por lo cual requiri&oacute; resecci&oacute;n intestinal, con ileostom&iacute;a y f&iacute;stula mucosa. Durante el posoperatorio necesit&oacute; soporte en la unidad de cuidados intensivos y, posteriormente, en salas de hospitalizaci&oacute;n, y fue dada de alta una vez su condici&oacute;n cl&iacute;nica se estabiliz&oacute;. </p>     <p><b><i>Palabras clave</i></b>: hiato de Winslow; hernia hiatal, hernia abdominal; epipl&oacute;n; obstrucci&oacute;n intestinal.</p> <hr size="1">     <p> <font size="3" face="Verdana"><b>Abstract</b></font></p>     <p>Internal hernias constitute 0.2% - 0.9% of all cases of intestinal obstruction. Of these, hernias  through the foramen of Winslow represent about 8%. This type of hernia is often associated with intestinal obstruction and some degree of ischemia. </p>     <p>Preoperative diagnosis is difficult and occurs in less than 10% of cases. </p>     ]]></body>
<body><![CDATA[<p>Treatment is surgical and mortality rate is about 50% when there is vascular compromise. </p>     <p>Four types of hernias through the foramen of Winslow are described depending on the organ involved. We report the case of a 73 year old female who was admitted to the emergency department with sudden progressive abdominal pain associated with nausea, emesis, and systemic compromise evidenced by metabolic acidosis and hyperlactatemia. At exploratory celiotomy a large hernia through the foramen of Winslow with ischemic necrosis of the terminal ileum, cecum and ascending colon was encountered, requiring bowel resection, ileostomy and mucous fistula. The patient required initial support in the ICU and was discharged once the clinical condition was stable.</p>     <p><b><i>Key words</i></b>: Winslow hiatus; hernia, hiatal; hernia, abdominal; omentum; intestinal obstruction.</p> <hr size="1">     <p> <font size="3" face="Verdana"><b>Introducci&oacute;n</b></font></p>     <p>Las hernias internas constituyen una peque&ntilde;a minor&iacute;a de las causas de obstrucci&oacute;n intestinal, cuya incidencia es menor de 1 %. Las hernias del hiato de Winslow corresponden al 8 % de ellas, siendo muy infrecuentes <sup>1-3</sup>. Su curso puede variar desde la instauraci&oacute;n aguda, pasando por s&iacute;ntomas cr&oacute;nicos e inespec&iacute;ficos, e incluso, casos descritos durante necropsias por otras causas. Actualmente, se describen cuatro tipos de hernias del hiato de Winslow, dependiendo del &oacute;rgano herniado<sup> 4</sup>. Es una entidad de dif&iacute;cil diagn&oacute;stico preoperatorio y el pron&oacute;stico del paciente depende de la rapidez en la instauraci&oacute;n del tratamiento quir&uacute;rgico, ya que la morbimortalidad se acerca al 50 % cuando existe compromiso vascular del &oacute;rgano afectado <sup>1-10</sup>.</p>     <p> <font size="3" face="Verdana"><b>Presentaci&oacute;n del caso</b></font></p>     <p>Se trata de una paciente de 74 a&ntilde;os de edad, con hipertensi&oacute;n arterial sist&eacute;mica controlada como &uacute;nica enfermedad y sin antecedentes quir&uacute;rgicos, que ingres&oacute; al servicio de urgencias de la Fundaci&oacute;n Cardioinfantil (Bogot&aacute;, Colombia). Presentaba un cuadro cl&iacute;nico de 36 horas de evoluci&oacute;n de dolor abdominal de inicio s&uacute;bito, el cual era progresivo en intensidad y se asociaba a sensaci&oacute;n de distensi&oacute;n abdominal, n&aacute;useas y m&uacute;ltiples episodios de v&oacute;mito. En sus ex&aacute;menes paracl&iacute;nicos de ingreso se encontraron 24.500 leucocitos por ml, y la gasimetr&iacute;a arterial mostr&oacute; acidemia metab&oacute;lica e hiperlactatemia. </p>     <p>Fue sometida a laparotom&iacute;a exploratoria urgente con los siguientes hallazgos intraoperatorios: importante distensi&oacute;n g&aacute;strica, presencia en la transcavidad de los epiplones del &iacute;leon distal, el ap&eacute;ndice, el ciego y el colon ascendente, los cuales se encontraban herniados a trav&eacute;s del hiato de Winslow, con compromiso isqu&eacute;mico y necrosis transmural sin perforaci&oacute;n (figuras <a href="#figura1">1</a> y<a href="#figura2"> 2</a>). Se practic&oacute; hemicolectom&iacute;a derecha sin reducir la hernia y la pieza quir&uacute;rgica se extrajo a trav&eacute;s de la transcavidad de los epiplones y exponiendo el hiato de Winslow (figuras <a href="#figura2">2</a>, <a href="#figura3">3</a>, <a href="#figura4">4</a>). Por su condici&oacute;n cl&iacute;nica fue necesario realizar ileostom&iacute;a y f&iacute;stula mucosa. Se traslad&oacute; a la unidad de cuidados intensivos para monitoreo posquir&uacute;rgico y continu&oacute; hospitalizada hasta que su condici&oacute;n cl&iacute;nica se estabiliz&oacute; para ser dada de alta. </p>     <p>    <center><a name="figura1"></a>    ]]></body>
<body><![CDATA[<br> <img src="img/revistas/rcci/v30n4/v30n4a8f1.gif"></center></p>     <p>    <center><a name="figura2"></a>    <br> <img src="img/revistas/rcci/v30n4/v30n4a8f2.gif"></center></p>     <p>    <center><a name="figura3"></a>    <br> <img src="img/revistas/rcci/v30n4/v30n4a8f3.gif"></center></p>     <p>    <center><a name="figura4"></a>    <br> <img src="img/revistas/rcci/v30n4/v30n4a8f4.gif"></center></p>      ]]></body>
<body><![CDATA[<p> <font size="3" face="Verdana"><b>Discusi&oacute;n</b></font></p>     <p>La cavidad peritoneal consiste en dos principales espacios, el saco mayor o cavidad peritoneal general y la bolsa epiploica (<i>bursa omentalis</i>), saco menor o transcavidad de los epiplones. Estas cavidades est&aacute;n conectadas por el foramen epiploico de Winslow <sup>1-8</sup>. El hiato de Winslow, o foramen epiploico, es una comunicaci&oacute;n virtual entre la cavidad peritoneal mayor y la transcavidad de los epiplones; est&aacute; limitado en su aspecto anterior por el ligamento hepatoduodenal, en el posterior por la vena cava inferior, en el superior por el l&oacute;bulo caudado y en el inferior por el duodeno. Se encuentra obliterado por la propia presi&oacute;n intraabdominal, pero es f&aacute;cilmente franqueable <sup>3</sup>. Las hernias internas se definen como la protrusi&oacute;n de una v&iacute;scera a trav&eacute;s de un orificio natural de la cavidad abdominal. Se le atribuye a Bladin, en 1834, el reporte del primer caso de hernia del hiato de Winslow y, desde entonces, se han reportado poco m&aacute;s de 200 casos, la mayor&iacute;a de ellos asociados a obstrucci&oacute;n intestinal. <sup>6,11</sup>. Por lo general, este tipo de hernia se diagnostica durante el procedimiento quir&uacute;rgico <sup>12</sup>.</p>     <p>Una herniaci&oacute;n intestinal a trav&eacute;s del hiato de Winslow suele iniciarse de derecha a izquierda y progresar de dos formas: a) disecando el espacio del hiato y ocupando la transcavidad de los epiplones, con desplazamiento del est&oacute;mago hacia adelante y a la izquierda; o, b) protruyendo la delgada l&aacute;mina que constituye el epipl&oacute;n menor hasta romperla, con la consiguiente angulaci&oacute;n de la v&iacute;scera herniada por delante del est&oacute;mago, dejando este &uacute;ltimo en situaci&oacute;n posterior. Raramente, la hernia del hiato de Winslow se desarrolla de izquierda a derecha; en estos casos, la presi&oacute;n de la v&iacute;scera sobre el epipl&oacute;n menor permite franquear el hiato y emerger por el lado derecho <sup>1-20</sup>.</p>     <p>Las hernias internas son responsables de 0,2 a 0,9 % de todos los casos de obstrucci&oacute;n intestinal. Las hernias del hiato de Winslow corresponden a cerca del 8 % de todas las hernias internas y est&aacute;n frecuentemente asociadas a obstrucci&oacute;n. Se presentan usualmente entre los 20 y los 60 a&ntilde;os, y afectan a hombres y mujeres por igual <sup>9-18</sup>. Comprometen principalmente el intestino delgado (60-70 %), seguido por el ciego, el &iacute;leon terminal y el colon ascendente (25-30 %), y en menor proporci&oacute;n, otras estructuras anat&oacute;micas. Se describen cuatro tipos de hernias del hiato de Winslow: tipo I, hernia aislada de intestino delgado (50-70 %); tipo II, incluye &iacute;leon distal, ciego y colon ascendente (25-30 %); tipo III, incluye el colon transverso (7% de los casos); y tipo IV, incluye ves&iacute;cula biliar, epipl&oacute;n mayor y divert&iacute;culo de Meckel o solamente este &uacute;ltimo (1 %) <sup>4</sup>. </p>     <p>Su presentaci&oacute;n cl&iacute;nica es variable, con s&iacute;ntomas y signos inespec&iacute;ficos, de evoluci&oacute;n insidiosa o instauraci&oacute;n aguda y, en algunos casos, de resoluci&oacute;n espont&aacute;nea. Suele existir oclusi&oacute;n con isquemia de grado variable, pero puede tambi&eacute;n presentarse como ictericia obstructiva, c&oacute;lico biliar, pancreatitis secundaria y herniaci&oacute;n no sintom&aacute;tica. Se han relacionado algunos casos con la fundoplicatura de Niessen y la colecistectom&iacute;a laparosc&oacute;pica <sup>3,19-22</sup>.</p>     <p>Los pacientes se presentan con s&iacute;ntomas de obstrucci&oacute;n intestinal aguda alta, inclusive en casos de herniaci&oacute;n del colon. Estos s&iacute;ntomas son causados por la presi&oacute;n y la distensi&oacute;n de la v&iacute;scera herniada sobre el est&oacute;mago. Se han publicado otros casos de pacientes con s&iacute;ntomas cr&oacute;nicos o intermitentes, o incluso, otros que eran completamente asintom&aacute;ticos y a quienes se les hizo el diagn&oacute;stico de manera incidental durante una laparotom&iacute;a por otra raz&oacute;n. Semiol&oacute;gicamente, el dolor puede reducirse con la flexi&oacute;n de la cadera y las rodillas, ya que en la posici&oacute;n de pie el foramen de Winslow causa un aumento de la presi&oacute;n del asa intestinal herniada <sup>23-25</sup>.</p>     <p>La mayor&iacute;a de las hernias internas se originan como una entidad primaria; sin embargo, en 1987, se describi&oacute; un caso de herniaci&oacute;n a trav&eacute;s del hiato de Winslow tres d&iacute;as despu&eacute;s de una colecistectom&iacute;a <sup>3,22</sup>. Las causas reales de la herniaci&oacute;n a trav&eacute;s del hiato de Winslow se desconocen. Sin embargo, se han descrito los siguientes factores que predisponen a su presentaci&oacute;n: mesenterio muy largo; hiato muy amplio, generalmente mayor del trav&eacute;s de dedo; falta de fijaci&oacute;n del colon a la pared abdominal posterior (ciego m&oacute;vil); l&oacute;bulo hep&aacute;tico derecho (l&oacute;bulo de Riedel) agrandado; defectos del ligamento gastrohep&aacute;tico, atrofia del epipl&oacute;n mayor; mala rotaci&oacute;n o rotaci&oacute;n intestinal incompleta, y procedimientos quir&uacute;rgicos, como fundoplicatura de Niessen, trasplante hep&aacute;tico, derivaci&oacute;n g&aacute;strico y colecistectom&iacute;a <sup>19-26</sup>.</p>     <p>En la tomograf&iacute;a computadorizada (TC) pueden verse asas de intestino delgado o de colon en la transcavidad de los epiplones, distendidas y agrupadas, y los vasos tensos pasando a trav&eacute;s del hiato <sup>1,11,14-16</sup>. Para su tratamiento, debe reducirse la hernia por simple tracci&oacute;n, si es posible, o con procedimientos un poco m&aacute;s complejos, como la maniobra de Kocher o la apertura de la transcavidad de los epiplones. Una vez reducida, se deben recolocar las v&iacute;sceras herniadas en posici&oacute;n anat&oacute;mica. Se postula que el hiato de Winslow se cierra espont&aacute;neamente debido a la reacci&oacute;n inflamatoria posperatoria, por lo que el cierre quir&uacute;rgico no es una recomendaci&oacute;n constante. En caso de existir compromiso de las asas intestinales, debe hacerse la resecci&oacute;n correspondiente. El diagn&oacute;stico preoperatorio certero o de sospecha de hernia del hiato de Winslow, s&oacute;lo se hace en 10 % de los casos y la indicaci&oacute;n de cirug&iacute;a urgente es el &uacute;nico factor que disminuye su morbimortalidad <sup>1-25</sup>. Cuando se compromete el colon, en la TC se pueden observar niveles hidroa&eacute;reos caracter&iacute;sticos a nivel del epigastrio, del hilio hep&aacute;tico o ambos, ausencia del ciego en la fosa iliaca derecha, as&iacute; como desplazamiento g&aacute;strico anterior o posterior y hacia la izquierda. El examen de v&iacute;as digestivas altas con Gastrografin<sup>&reg;</sup> y el colon por enema, as&iacute; como la ecograf&iacute;a, tambi&eacute;n pueden ser de utilidad <sup>1,13,14-16</sup>.</p>     <p>En algunos reportes no se recomienda el cierre del foramen debido al riesgo de lesi&oacute;n de la arteria hep&aacute;tica o de los conductos biliares y de trombosis de la vena porta, y por el hecho de que no existen reportes de recurrencia despu&eacute;s de cirug&iacute;a <sup>1,2,4,7</sup>. Sin embargo, algunos cirujanos lo han cerrado mediante fijaci&oacute;n quir&uacute;rgica del duodeno, del epipl&oacute;n o de la flexura c&oacute;lica derecha, sin complicaciones <sup>9</sup>.</p>     <p> <font size="3" face="Verdana"><b>Referencias</b></font></p>     ]]></body>
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