<?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>0034-7434</journal-id>
<journal-title><![CDATA[Revista Colombiana de Obstetricia y Ginecología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Colomb Obstet Ginecol]]></abbrev-journal-title>
<issn>0034-7434</issn>
<publisher>
<publisher-name><![CDATA[Federación Colombiana de Obstetricia y GinecologíaRevista Colombiana de Obstetricia y Ginecología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-74342003000100004</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Hernia diafragmática congénita: presentación de un caso y revisión de la literatura]]></article-title>
<article-title xml:lang="en"><![CDATA[Congenital diaphragmatic hernia: a case report and review of literature]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sepúlveda Agudelo]]></surname>
<given-names><![CDATA[Janer]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Becerra Mojica]]></surname>
<given-names><![CDATA[Carlos Hernán]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ariza Cadena]]></surname>
<given-names><![CDATA[Fredy]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Acosta Puentes]]></surname>
<given-names><![CDATA[Diana M]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arévalo Pardo]]></surname>
<given-names><![CDATA[Javier]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Industrial de Santander Ginecología y Obstetricia ]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad Industrial de Santander Hospital Universitario Ramón González Valencia Departamento de Ginecología y Obstetricia]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
</aff>
<aff id="A03">
<institution><![CDATA[,Hospital San Juan de Dios de Vélez  ]]></institution>
<addr-line><![CDATA[Vélez Santander]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2003</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2003</year>
</pub-date>
<volume>54</volume>
<numero>1</numero>
<fpage>17</fpage>
<lpage>24</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0034-74342003000100004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0034-74342003000100004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0034-74342003000100004&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Presentamos el caso de una gestante de 14 años cuyo embarazo fue diagnosticado en el hospital San Juan de Dios de Vélez, Colombia. El producto presentó hernia diafragmática congénita; esta alteración ocurre con una frecuencia de 1 en 2 000 embarazos, por lo cual se hace una revisión detallada de la literatura de esta patología.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[We present a case of a 14 years old woman diagnosed in the San Juan de Dios hospital at Vélez, Colombia with a product suffering congenital diaphragmatic hernia has an incidence of one in 2 000 pregnancies, we review the literature of this pathology.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[hernia diafragmática congénita]]></kwd>
<kwd lng="es"><![CDATA[diafragma]]></kwd>
<kwd lng="es"><![CDATA[surfactante]]></kwd>
<kwd lng="es"><![CDATA[hipoplasia pulmonar]]></kwd>
<kwd lng="es"><![CDATA[cirugía fetal]]></kwd>
<kwd lng="en"><![CDATA[congenital diaphragmatic hernia]]></kwd>
<kwd lng="en"><![CDATA[diaphragm]]></kwd>
<kwd lng="en"><![CDATA[surfactant]]></kwd>
<kwd lng="en"><![CDATA[pulmonary hypoplasia fetal surgery]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p>    <center><b>Hernia diafragm&aacute;tica cong&eacute;nita: presentaci&oacute;n de un caso y revisi&oacute;n de la literatura</b></center></p>     <p>Janer Sep&uacute;lveda Agudelo, M.D.<sup>*</sup>, Carlos Hern&aacute;n Becerra Mojica, M.D.<sup>**</sup>, Fredy Ariza Cadena, M.D.<sup>***</sup>, Diana M. Acosta Puentes, M.D.<sup>***</sup>, Javier Ar&eacute;valo Pardo, M.D.<sup>***</sup></p>     <p>    <center>Recibido: agosto 1/2002 - Revisado: agosto 6/2002 - Aceptado: agosto 22/2002</center></p>     <p><sup>*</sup> M&eacute;dico especialista en Ginecolog&iacute;a y Obstetricia. Profesor de c&aacute;tedra Universidad Industrial de Santander. </p>     <p><sup>**</sup> M&eacute;dico ginecobstetra perinat&oacute;logo. Profesor Asistente, departamento de Ginecolog&iacute;a y Obstetricia. Universidad Industrial de Santander, Hospital Universitario Ram&oacute;n Gonz&aacute;lez Valencia, Bucaramanga. </p>     <p><sup>***</sup> M&eacute;dico de planta, Hospital San Juan de Dios de V&eacute;lez, Santander. </p>     <p>Correspondencia: Dr. Janer Sep&uacute;lveda Agudelo, Calle 52 No. 34-27, Bucaramanga, Tel&eacute;fono: 6474405. </p>     <p><b>RESUMEN</b> </p>     ]]></body>
<body><![CDATA[<p>Presentamos el caso de una gestante de 14 a&ntilde;os cuyo embarazo fue diagnosticado en el hospital San Juan de Dios de V&eacute;lez, Colombia. El producto present&oacute; hernia diafragm&aacute;tica cong&eacute;nita; esta alteraci&oacute;n ocurre con una frecuencia de 1 en 2 000 embarazos, por lo cual se hace una revisi&oacute;n detallada de la literatura de esta patolog&iacute;a. </p>     <p><b>Palabras clave: </b>hernia diafragm&aacute;tica cong&eacute;nita, diafragma, surfactante, hipoplasia pulmonar, cirug&iacute;a fetal. </p>     <p>    <center><b>Congenital diaphragmatic hernia: a case report and review of literature </b></center></p>     <p><b>SUMMARY</b> </p>     <p>We present a case of a 14 years old woman diagnosed in the San Juan de Dios hospital at V&eacute;lez, Colombia with a product suffering congenital diaphragmatic hernia has an incidence of one in 2 000 pregnancies, we review the literature of this pathology. </p>     <p><b>Key words: </b>congenital diaphragmatic hernia, diaphragm, surfactant, pulmonary hypoplasia fetal surgery </p>     <p><b>INTRODUCCI&Oacute;N</b> </p>     <p>La hernia diafragm&aacute;tica cong&eacute;nita (HDC) es la anormalidad de desarrollo m&aacute;s com&uacute;n del diafragma(1,2) y una de las malformaciones m&aacute;s comunes en el neonato ocurre con una frecuencia de 1 en 2 000 embarazos y 1 en 2 200 a 5 000 nacidos vivos.(2-6) La relaci&oacute;n hombre: mujer es de 1:1,8.(6)</p>     <p>La etiolog&iacute;a generalmente se desconoce y es probable que casi todos los casos sean multifactoriales; tambi&eacute;n se ha asociado con anomal&iacute;as cromos&oacute;micas desde un 20% a un 53% y se ha descrito una forma autos&oacute;mica recesiva.(7)</p>     ]]></body>
<body><![CDATA[<p>A pesar de la intensa investigaci&oacute;n y una intervenci&oacute;n terap&eacute;utica agresiva en los infantes con HDC se contin&uacute;a con una morbimortalidad elevada entre un 40% y 70% debido a que la hipoplasia y la hipertensi&oacute;n pulmonar persistente que se presentan en estos pacientes complican los esfuerzos por mantener un intercambio gaseoso con ventilaci&oacute;n convencional.(8) </p>     <p><b>CASO CL&Iacute;NICO</b> </p>     <p>Paciente de 14 a&ntilde;os procedente del &aacute;rea rural de la Belleza, Santander, quien asiste a la unidad de ecograf&iacute;a del Hospital San Juan de Dios de V&eacute;lez, Santander, para realizaci&oacute;n de ecograf&iacute;a obst&eacute;trica. </p>     <p>Antecedentes: G<SUB>0</SUB>P<SUB>0</SUB>A<SUB>0</SUB>, menarquia a los 11 a&ntilde;os, ciclos regulares 28/3-4, fecha de &uacute;ltima menstruaci&oacute;n desconocida, grupo O Rh negativo. Resto de antecedentes sin importancia. Al examen f&iacute;sico se encuentra una paciente buenas condiciones generales. Cabeza, cuello y cardiopulmonar normal. Abdomen globoso por &uacute;tero gr&aacute;vido, feto &uacute;nico vivo, longitudinal cef&aacute;lico, dorso derecho con altura uterina de 32 cent&iacute;metros. Tacto vaginal: cuello cerrado sin cambios cervicales, extremidades normales. Se realiza ecograf&iacute;a que muestra embarazo con edad gestacional estimada por biometr&iacute;a 28 ±2,4 semanas, con sospecha de hernia diafragm&aacute;tica por visualizaci&oacute;n de asas intestinales y est&oacute;mago en cavidad tor&aacute;cica, dextrocardia, resto de la anatom&iacute;a fetal normal. Polihidramnios y placenta normal. </p>     <p>Se remite a la unidad materno-fetal del hospital Ram&oacute;n Gonz&aacute;lez Valencia, donde se confirma el diagn&oacute;stico y se informa a la pareja del diagn&oacute;stico, pron&oacute;stico y terap&eacute;utica. </p>     <p>Se realiza ces&aacute;rea segmentaria programada a las 38 semanas de embarazo. Se obtiene reci&eacute;n nacido de sexo femenino con Apgar de 5/10 al minuto y 7/10 a los 5 minutos pero a pesar del cuidado neonatal fallece a las 4 horas de vida; no fue intervenida quir&uacute;rgicamente. </p>     <p><b>DISCUSI&Oacute;N</b> </p>     <p>El desarrollo del diafragma el cual separa la cavidad tor&aacute;cica de la abdominal es complicado y no est&aacute; completamente entendido.(6) </p>     <p>El diafragma muscular se forma entre la sexta y la decimocuarta semana de gestaci&oacute;n como resultado de una complicada cadena de fen&oacute;menos que implican la fusi&oacute;n de 4 estructuras:(1,9)</p>     <p>1. El septum transversum: forma la parte tendinosa del diafragma, es la estructura m&aacute;s importante que divide la cavidad cel&oacute;mica intraembrionaria. De origen mesod&eacute;rmico, se encuentra entre la cavidad tor&aacute;cica y el ped&iacute;culo del saco vitelino. </p>     ]]></body>
<body><![CDATA[<p>2. Membranas pleuroperitoneales: cierran los canales pericardioperitoneales en la parte posterior del septum transversum. Tienen la funci&oacute;n de permitir el crecimiento de los esbozos pulmonares, permiti&eacute;ndoles un espacio libre de expansi&oacute;n. </p>     <p>3. Componentes musculares de las paredes corporales lateral y dorsal (mioblastos provenientes de la pared, los cuales penetran en las membranas formando la parte muscular). La cara m&aacute;s posterior del diafragma derivada de la pared corporal es la &uacute;ltima en formarse. </p>     <p>4. Mesenterio esof&aacute;gico: da origen a los pilares del diafragma. </p>     <p>Schumpelick y colaboradores (6) afirman que estos 4 componentes no delinean precisamente el diafragma definitivo y se necesitan adicionalmente investigaciones embriol&oacute;gicas detalladas. </p>     <p>Hacia el fin de la octava semana menstrual, el diafragma primitivo est&aacute; intacto, la falta de fusi&oacute;n de alguno de estos procesos provoca un defecto diafragm&aacute;tico que posibilita la herniaci&oacute;n de v&iacute;sceras abdominales hacia el t&oacute;rax. </p>     <p>La HDC se presenta mas com&uacute;nmente del lado izquierdo en el 75% a 90% de los casos,(1,9) y la mayor&iacute;a son unilaterales en un 97%.(1) El 92% son defectos posterolaterales o hernia de Bochdalek.(1,10)</p>     <p>Existen otos tipos menos comunes de HDC que incluyen la hernia paraesternal donde el saco peritoneal penetra al t&oacute;rax entre las porciones esternal y costal del diafragma y la hernia esof&aacute;gica debida m&aacute;s a un acortamiento cong&eacute;nito de la longitud esof&aacute;gica, permaneciendo en t&oacute;rax el cardias y la porci&oacute;n superior del est&oacute;mago, con constricci&oacute;n de este &uacute;ltimo a nivel del diafragma.(2) </p>     <p>Esta patolog&iacute;a se asocia pr&aacute;cticamente siempre con efecto de masa, que se manifiesta en el feto por desplazamiento del mediastino, compresi&oacute;n pulmonar y reducci&oacute;n del tejido pulmonar funcional;(3,11) la compresi&oacute;n del tejido pulmonar antes de la semana 16, momento en que el desarrollo bronquial es completo determina reducci&oacute;n del n&uacute;mero de bronquios y alv&eacute;olos del pulm&oacute;n en desarrollo lo que conlleva a la hipoplasia pulmonar vista en estos pacientes. </p>     <p>Se observ&oacute; que en los modelos de HDC inducidos experimentalmente con nitrof&eacute;n(12,13)<sup> </sup>no exist&iacute;a retardo en la aparici&oacute;n de las yemas pulmonares, aunque si hubo una disminuci&oacute;n en su n&uacute;mero final asociada a una disminuci&oacute;n significativa de las c&eacute;lulas epiteliales y mesenquimales con desorganizaci&oacute;n y compactaci&oacute;n del tejido particularmente alrededor de los espacios a&eacute;reos. En estudios post m&oacute;rtem se ha evidenciado subdesarrollo del lecho vascular pulmonar y aumento de la musculatura de las arterias preacinares.(14) </p>     <p>El pulm&oacute;n hipopl&aacute;sico en HDC presenta una reducci&oacute;n cuantitativa y cualitativa de surfactante y un compromiso de la distensibilidad pulmonar.(15-17) Se ha reportado recientemente el rol del ox&iacute;geno como regulador del gen que codifica para la prote&iacute;na asociada al surfactante (SP) en pulmones sanos al incrementar su expresi&oacute;n, la cual se encuentra notablemente disminuida en los pacientes con HDC.(13) IJsselstijn y colaboradores no encontraron deficiencia de surfactante en pacientes con HDC.(18)</p>     ]]></body>
<body><![CDATA[<p><b>MALFORMACIONES ASOCIADAS</b> </p>     <p>Del 20% al 53% de los fetos con HDC presentan malformaciones asociadas, sobre todo defectos cardiacos (9% a 23%), defectos del tubo neural (28%), trisom&iacute;as y ciertos s&iacute;ndromes bien definidos.(6,19,20) En algunas ocasiones la HDC se encuentra asociada con anomal&iacute;as cong&eacute;nitas del &aacute;rbol bronquial (17,9%), las cuales se asocian con una pobre supervivencia.(12) </p>     <p><b>DIAGN&Oacute;STICO PRENATAL</b> </p>     <p>El diagn&oacute;stico se realiza por ecograf&iacute;a, se basa en la visualizaci&oacute;n de &oacute;rganos abdominales en el t&oacute;rax y el signo ecogr&aacute;fico distintivo es una masa ocupada por l&iacute;quido inmediatamente por detr&aacute;s de la aur&iacute;cula y el ventr&iacute;culo izquierdos en la parte inferior del t&oacute;rax visualizado en una vista transversal.(1,6,21,22) </p>     <p>Otros signos ecogr&aacute;ficos que hacen sospechar el diagn&oacute;stico son la ausencia del est&oacute;mago en el abdomen, desplazamiento del mediastino, per&iacute;metro abdominal fetal peque&ntilde;o y polihidramnios.(1,22)<sup> </sup>Sebire et al. encontraron incremento en la translucencia nucal, entre la 10 y 14 semana de embarazo en pacientes con HDC que puede ser un marcador de compresi&oacute;n intrator&aacute;cica, relacionado con hipoplasia pulmonar.(21) </p>     <p><b>MORBIMORTALIDAD</b> </p>     <p>Los resultados en torno a la HDC permanecen pobres a pesar de los recientes avances en el cuidado neonatal con una cifra de mortalidad variable, entre 40% a 70%.(23) Sin embargo recientemente el grupo de estudio multic&eacute;ntrico de HDC report&oacute; una tasa de supervivencia del 63% en un estudio con 442 pacientes.(3,6) Se ha observado una correlaci&oacute;n entre la sobrevida y el volumen pulmonar encontrando que un m&iacute;nimo de 45% del volumen pulmonar esperado para la edad gestacional es necesario para la supervivencia.(23) En un estudio anal&iacute;tico de seguimiento a embarazos con HDC se observ&oacute; que un 35% de estos se perdieron tempranamente 22,6% presentaron muerte perinatal, 12,9% muerte tard&iacute;a y 29% sobrevivieron. De estos &uacute;ltimos el 44% presentaron recuperaci&oacute;n total y el 55% quedaron con morbilidad persistente. El 50% fueron HDC simples, un 25% se asoci&oacute; con anomal&iacute;as cardiacas (defectos septoventriculares, septoauriculares, ductus arterioso persistente y dilataci&oacute;n ventricular), y el 25% restante se relacion&oacute; con anomal&iacute;as severas (trisom&iacute;as 18 y 13, pentalog&iacute;a de Cantrell, higroma qu&iacute;stico y tetralog&iacute;a de Fallot).(24) </p>     <p>El pron&oacute;stico tambi&eacute;n guarda una relaci&oacute;n estrecha con la presencia de malformaciones asociadas, el volumen del contenido intestinal herniado y el momento de la herniaci&oacute;n; por lo tanto las hernias m&aacute;s grandes y las que se producen durante las primeras semanas de gestaci&oacute;n son de peor pron&oacute;stico.(7) </p>     <p>Dependiendo de los hallazgos ultrasonogr&aacute;ficos se puede predecir la supervivencia fetal comenzando por la edad gestacional temprana (&lt; 25 semanas) y la presencia de polihidramnios que fueron relacionados con alta mortalidad.(23-27) </p>     <p>Algunos &iacute;ndices han sido utilizados para determinar la respuesta y el pron&oacute;stico al tratamiento quir&uacute;rgico como son el &iacute;ndice de McGoon que relaciona el tama&ntilde;o de la arteria pulmonar con el tama&ntilde;o de la aorta descendente, y el &iacute;ndice de Nakata que relaciona estos mismos par&aacute;metros con el &aacute;rea de superficie corporal.(14) Otro es el &iacute;ndice de McGoon modificado: (RPA+LPA)/DA, donde RPA y LPA son los di&aacute;metros de las arterias pulmonares derecha e izquierda los cuales son medidos en la bifurcaci&oacute;n de las mismas durante la s&iacute;stole, y DA es el di&aacute;metro de la aorta descendente medido a nivel del diafragma. &Iacute;ndices mayores de 1,7 han sido correlacionados con aumento de la supervivencia mientras que &iacute;ndices menores de 1,3 representados en hipoplasia pulmonar severa, disminuyen considerablemente las posibilidades de vida en estos pacientes (sensibilidad 85% y especificidad 100%).(14) </p>     ]]></body>
<body><![CDATA[<p>El &iacute;ndice de la relaci&oacute;n del &aacute;rea del pulm&oacute;n derecho sobre la circunferencia cef&aacute;lica parece ser el mejor factor para predecir la supervivencia. Fetos con &iacute;ndice menor o igual a 1,0 tienen una mortalidad mayor del 90%, e &iacute;ndices iguales o mayores a 1,4, la supervivencia es cercana al 100%.(28) </p>     <p>Otros signos ecogr&aacute;ficos asociados con mal pron&oacute;stico son la presencia de dilataci&oacute;n persistente del est&oacute;mago en el t&oacute;rax y el subdesarrollo cardiaco izquierdo.(1,27) </p>     <p>La hernia hep&aacute;tica hacia el t&oacute;rax tampoco predice bien la supervivencia en HDC.(27,29) </p>     <p>Walsh DS, et al. afirman que se puede predecir el pron&oacute;stico fetal determinando la herniaci&oacute;n del h&iacute;gado y el volumen del h&iacute;gado dentro del pulm&oacute;n por resonancia nuclear magn&eacute;tica.(30) </p>     <p>Badalian et al. y Fox et al. sugieren que la ausencia de flujo de l&iacute;quido nasal relacionado con la respiraci&oacute;n y medido por Doppler puede ser usado como marcador de mal pron&oacute;stico perinatal, porque est&aacute; relacionado directamente con hipoplasia pulmonar.(31,32) </p>     <p>Desde el punto de vista ecogr&aacute;fico la HDC puede ser confundida con otras anormalidades fetales intrator&aacute;cicas como la malformaci&oacute;n adenoqu&iacute;stica cong&eacute;nita, los quistes broncog&eacute;nicos y el secuestro extrolobular.(1) </p>     <p><b>TRATAMIENTO</b> </p>     <p>Cuando el diagn&oacute;stico se realiza antes de la semana 28 se debe realizar ecograf&iacute;a de detalle anat&oacute;mico, amniocentesis o cordocentesis para determinar cariotipo y un ecocardiograma para excluir otras anomal&iacute;as.(24) </p>     <p>El tratamiento incluye terapias como el uso de corticosteroides, la ventilaci&oacute;n de alta frecuencia, oxigenaci&oacute;n con membrana extracorp&oacute;rea (ECMO), terapia con surfactante, &oacute;xido n&iacute;trico y cirug&iacute;a fetal.(3,33-37) En modelos animales con HDC se ha documentado una inmadurez pulmonar histol&oacute;gica y bioqu&iacute;mica(38) similar a los fetos prematuros en los que se demostr&oacute; una mejor&iacute;a significativa con corticoides;(8,39) algunos estudios demuestran una similitud en los resultados con el tratamiento con corticoides, debido a que estos medicamentos espec&iacute;ficamente incrementan el contenido de fosfatidilcolina desaturada pulmonar, reduce la concentraci&oacute;n de glic&oacute;geno pulmonar, aumenta el tama&ntilde;o alveolar y la fracci&oacute;n de volumen alveolar.(5) Se demostr&oacute; tambi&eacute;n una inducci&oacute;n significativa de prote&iacute;nas asociadas a surfactante A y B.(5,40) Esta terapia es bastante atractiva por ser muy c&oacute;moda para el ginec&oacute;logo, es no invasiva y se podr&iacute;a combinar con reparaci&oacute;n quir&uacute;rgica in &uacute;tero,(41) distensi&oacute;n pulmonar por oclusi&oacute;n traqueal o distensi&oacute;n de la v&iacute;a a&eacute;rea con fluidos(42) y m&aacute;s a&uacute;n puede ser razonable su utilizaci&oacute;n postnatal ya que se ha visto alg&uacute;n beneficio con esta terapia en infantes prematuros con s&iacute;ndrome de dificultad respiratoria.(43,44)</p> <b>    <p>Cirug&iacute;a fetal</p> </b>    ]]></body>
<body><![CDATA[<p>En 1901 Ave efectu&oacute; la primera reparaci&oacute;n satisfactoria de una hernia diafragm&aacute;tica cong&eacute;nita en un ni&ntilde;o de nueve a&ntilde;os de edad, el cual sobrevivi&oacute;. En 1928 Betman y Hess operaron a un lactante de 3,5 meses de edad con &eacute;xito. En 1946 Gross public&oacute; una serie de 63 neonatos a quienes se les realiz&oacute; cirug&iacute;a, de los cuales 55 sobrevivieron; a 57 reci&eacute;n nacidos se les realiz&oacute; el procedimiento quir&uacute;rgico en las primeras 24 horas.(22) Desde 1984 hasta 1992 la Extracorporeal Life Support Organization, inform&oacute; 1318 casos con supervivencia cercana al 60%.(22) </p>     <p>En la d&eacute;cada de los 80 se dio inicio al tratamiento fetal mediante histerotom&iacute;a y exposici&oacute;n fetal para correcci&oacute;n de patolog&iacute;as letales. La primera correcci&oacute;n de la hernia diafragm&aacute;tica se realiz&oacute; en este mismo decenio, sin embargo los resultados no fueron los esperados dada la presencia de hipoplasia pulmonar, y por tanto el procedimiento fue abandonado.(29)</p>     <p>El tratamiento prenatal inicial consisti&oacute; en cerrar el defecto del diafragma, pero fetos con herniaci&oacute;n del l&oacute;bulo izquierdo del h&iacute;gado no pueden ser salvados con esta t&eacute;cnica porque la reducci&oacute;n de la v&iacute;scera hacia el abdomen tuerce la vena umbilical. Este tratamiento fue abandonado cuando no se mostr&oacute; ventaja de supervivencia en fetos sin herniaci&oacute;n hep&aacute;tica.(28) </p>     <p>Una estrategia terap&eacute;utica interesante es la obstrucci&oacute;n traqueal para prevenir el flujo normal del l&iacute;quido pulmonar fetal, esta oclusi&oacute;n positiva, normal en los pulmones en desarrollo, que es creada por producci&oacute;n de l&iacute;quido pulmonar hace crecer los pulmones hipopl&aacute;sicos y reduce las v&iacute;sceras hacia el abdomen.(29) La oclusi&oacute;n traqueal se ha logrado mediante tapones intratraqueales y grapas de aplicaci&oacute;n externa.(29,45) </p>     <p>Flake y cols. publicaron una experiencia con 15 casos con cirug&iacute;a fetal abierta y realizando oclusi&oacute;n traqueal con dos clips logrando una supervivencia del 33% en fetos con pobre pron&oacute;stico (&iacute;ndice de la relaci&oacute;n circunferencial cef&aacute;lica y &aacute;rea del pulm&oacute;n derecho = 1 y herniaci&oacute;n del l&oacute;bulo izquierdo del h&iacute;gado) pero con una alta tasa de morbilidad especialmente neurol&oacute;gica que alcanz&oacute; el 60%.(28) </p>     <p>Quintero y colaboradores describieron un caso utilizando cirug&iacute;a endosc&oacute;pica e introduciendo un tap&oacute;n en la tr&aacute;quea para oclusi&oacute;n que dura aproximadamente de 2 a 3 semanas y luego se retira en el postparto. Este procedimiento evita las complicaciones que ha revelado la cirug&iacute;a abierta que incluye lesi&oacute;n del nervio lar&iacute;ngeo recurrente, parto pret&eacute;rmino, secuelas neurol&oacute;gicas y edema pulmonar materno.(46) </p>     <p>Harrison y cols. describieron dos casos utilizando un bal&oacute;n inflabe para oclusi&oacute;n traqueal por v&iacute;a endosc&oacute;pica con buenos resultados.(47) </p>     <p>Harrison, Mychaliska y Abanese en un periodo de evaluaci&oacute;n de tres a&ntilde;os en 34 fetos de 86 con los criterios de pobre pron&oacute;stico antes mencionado; 13 pacientes con tratamiento postnatal, 13 con oclusi&oacute;n traqueal fetal abierta y 8 con oclusi&oacute;n traqueal endosc&oacute;pica reportaron una tasa de supervivencia del 38%, 15% y 75% respectivamente, demostrando que estos fetos se benefician de la oclusi&oacute;n traqueal endosc&oacute;pica mas no de la cirug&iacute;a abierta.(48) </p>     <p><b>BIBLIOGRAF&Iacute;A</b> </p>     <!-- ref --><p>1. 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