<?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>1130-0108</journal-id>
<journal-title><![CDATA[Revista Española de Enfermedades Digestivas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. esp. enferm. dig.]]></abbrev-journal-title>
<issn>1130-0108</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Española de Patología Digestiva]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1130-01082008001100010</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Toxicidad hepática recurrente secundaria a metilprednisolona intravenosa]]></article-title>
<article-title xml:lang="en"><![CDATA[Recurrent acute liver toxicity from intravenous methyprednisolone]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rivero Fernández]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Riesco]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moreira]]></surname>
<given-names><![CDATA[V. F.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moreno]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López San Román]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arranz]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruiz del Árbol]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Hospital Ramón y Cajal Servicio de Gastroenterología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Hospital Ramón y Cajal Servicio de Anatomía Patológica ]]></institution>
<addr-line><![CDATA[Madrid ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>11</month>
<year>2008</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>11</month>
<year>2008</year>
</pub-date>
<volume>100</volume>
<numero>11</numero>
<fpage>720</fpage>
<lpage>723</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_arttext&amp;pid=S1130-01082008001100010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_abstract&amp;pid=S1130-01082008001100010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_pdf&amp;pid=S1130-01082008001100010&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Las reacciones adversas hepáticas relacionadas con la administración de fármacos (hepatotoxicidad) son cuadros relativamente frecuentes que presentan una amplia variabilidad clínica e histológica. La identificación precoz de estos cuadros es fundamental en la práctica clínica debido a su potencial gravedad. En la mayoría de los casos la suspensión del fármaco desencadenante es suficiente para la resolución del cuadro clínico. A pesar de que los esteroides son utilizados en una amplia variedad de situaciones clínicas, la notificación de cuadros de hepatotoxicidad secundaria a esteroides intravenosos es excepcional. Presentamos el caso clínico de una mujer diagnosticada de esclerosis múltiple, que recibió metilprednisolona a altas dosis en forma de "pulsos" intravenosos como tratamiento de las reagudizaciones de su enfermedad y presentó 3 brotes recurrentes de hepatitis de predominio hepatocelular con un patrón clínico, analítico e histológico compatible con toxicidad hepática aguda secundaria a metilprednisolona intravenosa. En el tercer episodio se realizó una biopsia hepática que demostró un patrón de hepatitis aguda con necrosis líticas confluentes, histología no descrita previamente en pacientes tratados con esteroides intravenosos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Adverse drug reactions (hepatotoxicity) are a frequent cause of acute liver injury with a wide clinical and histological spectrum. An early recognition of drug-related liver disease has been considered essential in clinical practice due to potential risks. In most cases exposure discontinuation improves the clinical picture. Steroids are used in a variety of clinical settings. However, intravenous steroids have rarely been associated with hepatotoxicity. We report the case of a middle-aged woman with multiple sclerosis who received a bolus of methylprednisolone on three occasions for the management of relapsing disease, with the development of repeated episodes of elevated liver enzymes after corticoid administration. In the third episode a liver biopsy was performed, which showed acute hepatitis with bridging necrosis; such histological picture has not been described before in patients treated with intravenous steroids.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Metilprednisolona]]></kwd>
<kwd lng="es"><![CDATA[Hepatotoxicidad]]></kwd>
<kwd lng="es"><![CDATA[Esclerosis múltiple]]></kwd>
<kwd lng="en"><![CDATA[Methylprednisolone]]></kwd>
<kwd lng="en"><![CDATA[Hepatotoxicity]]></kwd>
<kwd lng="en"><![CDATA[Multiple sclerosis]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="right"><font face="Verdana" size="2"><b><a name="top"></a>NOTAS CLÍNICAS</b></font></p>     <p>&nbsp;</p>     <p><font face="Verdana" size="4"><b>Toxicidad hep&aacute;tica recurrente secundaria a metilprednisolona intravenosa</b></font></p>     <p><font face="Verdana" size="4"><b>Recurrent acute liver toxicity from intravenous methyprednisolone</b></font></P>     <p>&nbsp;</P>     <p>&nbsp;</p>     <P><font face="Verdana" size="2"><b>M. Rivero Fern&aacute;ndez, J. M. Riesco<sup>1</sup>, V. F. Moreira, A. Moreno<sup>1</sup>, A. L&oacute;pez San Rom&aacute;n, G. Arranz y L. Ruiz del &Aacute;rbol</b></font></p>     <P><font face="Verdana" size="2">Servicios de Gastroenterolog&iacute;a y <sup>1</sup>Anatom&iacute;a Patol&oacute;gica. Hospital Ram&oacute;n y Cajal. Madrid</font></p>     <p><font face="Verdana" size="2"><a href="#bajo">Dirección para correspondencia</a></font></p>     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p><hr size="1">     <p><font face="Verdana" size="2"><b>RESUMEN</b></font></p>     <p><font face="Verdana" size="2">Las reacciones adversas hep&aacute;ticas relacionadas con la administraci&oacute;n de f&aacute;rmacos (hepatotoxicidad) son cuadros relativamente frecuentes que presentan una amplia variabilidad cl&iacute;nica e histol&oacute;gica. La identificaci&oacute;n precoz de estos cuadros es fundamental en la pr&aacute;ctica cl&iacute;nica debido a su potencial gravedad. En la mayor&iacute;a de los casos la suspensi&oacute;n del f&aacute;rmaco desencadenante es suficiente para la resoluci&oacute;n del cuadro cl&iacute;nico.    <br>A pesar de que los esteroides son utilizados en una amplia variedad de situaciones cl&iacute;nicas, la notificaci&oacute;n de cuadros de hepatotoxicidad secundaria a esteroides intravenosos es excepcional.    <br>Presentamos el caso cl&iacute;nico de una mujer diagnosticada de esclerosis m&uacute;ltiple, que recibi&oacute; metilprednisolona a altas dosis en forma de "pulsos" intravenosos como tratamiento de las reagudizaciones de su enfermedad y present&oacute; 3 brotes recurrentes de hepatitis de predominio hepatocelular con un patr&oacute;n cl&iacute;nico, anal&iacute;tico e histol&oacute;gico compatible con toxicidad hep&aacute;tica aguda secundaria a metilprednisolona intravenosa. En el tercer episodio se realiz&oacute; una biopsia hep&aacute;tica que demostr&oacute; un patr&oacute;n de hepatitis aguda con necrosis l&iacute;ticas confluentes, histolog&iacute;a no descrita previamente en pacientes tratados con esteroides intravenosos.</font></p>     <p><font face="Verdana" size="2"><b>Palabras clave:</b> Metilprednisolona. Hepatotoxicidad. Esclerosis m&uacute;ltiple.</font></p> <hr size="1">     <p><font face="Verdana" size="2"><b>ABSTRACT</b></font></p>     <p><font face="Verdana" size="2">Adverse drug reactions (hepatotoxicity) are a frequent cause of acute liver injury with a wide clinical and histological spectrum. An early recognition of drug-related liver disease has been considered essential in clinical practice due to potential risks. In most cases exposure discontinuation improves the clinical picture.    <br>Steroids are used in a variety of clinical settings. However, intravenous steroids have rarely been associated with hepatotoxicity. We report the case of a middle-aged woman with multiple sclerosis who received a bolus of methylprednisolone on three occasions for the management of relapsing disease, with the development of repeated episodes of elevated liver enzymes after corticoid administration. In the third episode a liver biopsy was performed, which showed acute hepatitis with bridging necrosis; such histological picture has not been described before in patients treated with intravenous steroids.</font></P>     <p><font face="Verdana" size="2"><b>Key words:</b> Methylprednisolone. Hepatotoxicity. Multiple sclerosis.</font></p> <hr size="1">     ]]></body>
<body><![CDATA[<p>&nbsp;</p>     <p><font face="Verdana"><b>Introducci&oacute;n</b></font></p>     <p><font face="Verdana" size="2">La hepatotoxicidad inducida por f&aacute;rmacos es una de las etiolog&iacute;as m&aacute;s comunes de hepatitis aguda en nuestro medio y representa la causa m&aacute;s frecuente de fallo hep&aacute;tico fulminante en EE. UU. (1). Sin embargo, las tasas reales de hepatitis secundaria a f&aacute;rmacos son desconocidas (2). La expresi&oacute;n cl&iacute;nica de estos cuadros es muy variable, oscilando entre alteraciones asintom&aacute;ticas de las enzimas hep&aacute;ticas hasta fallo hep&aacute;tico agudo fulminante y su diagn&oacute;stico precisa de un alto &iacute;ndice de sospecha y se sustenta en una correcta anamnesis y la exclusi&oacute;n de las causas m&aacute;s comunes potencialmente responsables (3,4). Las escalas o algoritmos diagn&oacute;sticos son herramientas &uacute;tiles para valorar objetivamente la relaci&oacute;n de causalidad.</font></p>     <p><font face="Verdana" size="2">Los cuadros de hepatotoxicidad secundaria al uso de esteroides son poco frecuentes en la pr&aacute;ctica cl&iacute;nica. Una de las formas de aplicaci&oacute;n de esteroides a altas dosis es la pulsoterapia o "pulsos" intravenosos, alternativa terap&eacute;utica muy com&uacute;n en el tratamiento de las reagudizaciones graves de pacientes con enfermedades autoinmunes.</font></p>    <p> <font face="Verdana" size="2">A nuestro juicio, el caso cl&iacute;nico expuesto representa el primer caso confirmado histol&oacute;gicamente de hepatotoxicidad recurrente en relaci&oacute;n al uso de metilprednisolona administrada en "pulsos" intravenosos con patr&oacute;n de hepatitis aguda con necrosis.</font></p>     <p>&nbsp;</p>     <p><font face="Verdana"><b>Caso cl&iacute;nico</b></font></p>     <p><font face="Verdana" size="2">Mujer de 57 a&ntilde;os diagnosticada a los 44 a&ntilde;os de esclerosis m&uacute;ltiple (EM) que recibi&oacute; 3 cursos de 6-metilprednisolona a dosis de 1.000 mg intravenosa (i.v.) administrada en forma de "pulsos" por exacerbaci&oacute;n de su EM. La paciente previamente presentaba una anal&iacute;tica hep&aacute;tica rigurosamente normal, no reconoc&iacute;a ingesta habitual de alcohol y no tomaba f&aacute;rmacos potencialmente hepatot&oacute;xicos. A los 3 d&iacute;as de recibir el &uacute;ltimo "pulso" de 6-metilprednisolona i.v. present&oacute; la siguiente alteraci&oacute;n del perfil hep&aacute;tico en el an&aacute;lisis de rutina: GOT (AST): 543 U/l (N &lt; 50), GPT (ALT): 1223 U/l (N &lt; 40), BT: 1,2 mg/dl, GGT: 71 U/l (N &lt; 50), FA: 113 U/l (N &lt; 120), LDH: 423 U/l con posterior normalizaci&oacute;n de dichos valores 3 meses m&aacute;s tarde tras suspender la administraci&oacute;n del f&aacute;rmaco. Doce meses despu&eacute;s la paciente present&oacute; un nuevo episodio de exacerbaci&oacute;n de su EM por lo que recibi&oacute; nuevamente un ciclo de 3 bolos de 6-metilprednisolona (1 g/d&iacute;a i.v. durante 3 d&iacute;as) con reaparici&oacute;n de la alteraci&oacute;n del perfil hep&aacute;tico a los 5 d&iacute;as tras concluir la administraci&oacute;n del tratamiento (GOT: 541 U/l, GPT: 883 U/l, GGT: 82 U/l, FA: 100 U/l) con posterior normalizaci&oacute;n anal&iacute;tica a los 4 meses. Diecisiete meses tras la segunda exposici&oacute;n, recibi&oacute; nuevamente "bolos" de 3 d&iacute;as de 6-metilprednisolona i.v. a las mismas dosis, presentando un nuevo episodio de elevaci&oacute;n asintom&aacute;tica de las enzimas hep&aacute;ticas (GOT: 1328 U/l, GPT: 2685 U/l, GGT: 56 U/l, FA: 115 U/l) con posterior normalizaci&oacute;n de los par&aacute;metros bioqu&iacute;micos al mes de suspender el tratamiento. El resumen de la evoluci&oacute;n de los par&aacute;metros anal&iacute;ticos del paciente se presentan en la <a href="#f1">figura 1</a>.</font></p>     <p align="center"><font face="Verdana" size="2"><a name="f1"><img src="/img/revistas/diges/v100n11/nota1_01.jpg" width="377" height="357"></a></font></p>     <p><font face="Verdana" size="2">Durante la fase aguda de estos cuadros de alteraci&oacute;n de la bioqu&iacute;mica hep&aacute;tica, se determinaron la serolog&iacute;a del VHB (HBsAg, IgM HBcAc), VHC (PCR, anti-VHC, VHC-RNA) y VHA (anti-HA IgM e IgG) que fueron negativas, al igual que los anticuerpos antinucleares, antimitocondriales, antim&uacute;sculo liso, anti-LKM, antigliadina y antiendomisio. El cobre y la ceruloplasmina s&eacute;ricos, junto con la cupruria de 24 horas, la ferritina, la TSH y la &alpha;1-antitripsina estuvieron en rango normal. Las ecogra-f&iacute;as abdominales en relaci&oacute;n con los 3 episodios de alteraci&oacute;n de la bioqu&iacute;mica hep&aacute;tica no mostraron hallazgos patol&oacute;gicos. Un mes despu&eacute;s de la detecci&oacute;n del &uacute;ltimo brote de hepatitis aguda se decidi&oacute; la realizaci&oacute;n una de una biopsia hep&aacute;tica donde se identificaron lesiones histol&oacute;gicas caracter&iacute;sticas de hepatitis aguda con presencia de necrosis l&iacute;ticas e hiperplasia macrof&aacute;gica con ceroide (<a href="#f2">Fig. 2</a>).</font></p>     ]]></body>
<body><![CDATA[<p align="center"><font face="Verdana" size="2"><a name="f2"><img src="/img/revistas/diges/v100n11/nota1_02.jpg" width="377" height="360"></a></font></p>     <p><font face="Verdana" size="2">La conjunci&oacute;n de datos cl&iacute;nicos, anal&iacute;ticos e histol&oacute;gicos, una vez excluidas otras causas de potencial alteraci&oacute;n del perfil hep&aacute;tico sugirieron el diagn&oacute;stico de hepatitis aguda t&oacute;xica recurrente secundaria a metilprednisolona intravenosa.</font></p>     <p>&nbsp;</p>     <p><font face="Verdana"><b>Discusi&oacute;n</b></font></p>     <p><font face="Verdana" size="2">Las reacciones adversas hep&aacute;ticas relacionadas con la administraci&oacute;n de f&aacute;rmacos resultan de vital importancia en la pr&aacute;ctica cl&iacute;nica habitual debido a su potencial gravedad. Representan la causa m&aacute;s frecuente de restricci&oacute;n de uso y retirada de medicamentos del mercado farmac&eacute;utico (5).</font></p>     <p><font face="Verdana" size="2">Un estudio realizado en Francia sugiere que la tasa de incidencia anual de da&ntilde;o hep&aacute;tico inducido por f&aacute;rmacos es de 13,9 por cada 100.000 habitantes (6).</font></p>     <p><font face="Verdana" size="2">La mayor&iacute;a de los f&aacute;rmacos utilizados en la pr&aacute;ctica cl&iacute;nica son potencialmente hepatot&oacute;xicos. La toxicidad hep&aacute;tica es habitualmente idiosincr&aacute;sica, determinada por la susceptibilidad individual y no se relaciona con la dosis de f&aacute;rmaco (7).</font></p>     <p><font face="Verdana" size="2">Existen varios patrones de hepatotoxicidad: citot&oacute;xico (citol&iacute;tico), colest&aacute;sico, mixto y esteat&oacute;sico (8) y se ha sugerido que las formas citol&iacute;ticas evolucionan con mayor frecuencia a da&ntilde;o hep&aacute;tico fulminante (9). El diagn&oacute;stico precisa de un alto &iacute;ndice de sospecha y se sustenta en una correcta anamnesis y la exclusi&oacute;n de las causas m&aacute;s comunes potencialmente responsables. Entre los criterios favorables al diagn&oacute;stico de hepatotoxicidad se incluye la demostraci&oacute;n de una r&aacute;pida mejor&iacute;a cl&iacute;nica y biol&oacute;gica tras la retirada del f&aacute;rmaco <i>(dechallenge) </i>y la reaparici&oacute;n de las alteraciones tras la re-exposici&oacute;n al agente causal <i>(rechallenge)</i>. En la actualidad se utilizan la escala de Naranjo (10), la escala de CIOMS/RUCAM (11) y la escala diagn&oacute;stica cl&iacute;nica (CDS) (12) para valorar la relaci&oacute;n de causalidad.</font></p>     <p><font face="Verdana" size="2">La mayor&iacute;a de los cuadros mejoran suprimiendo el f&aacute;rmaco desencadenante.</font></p>     <p><font face="Verdana" size="2">Las alteraciones de la funci&oacute;n hep&aacute;tica tras el uso de esteroides pueden responder a varios mecanismos: reactivaci&oacute;n de infecciones hep&aacute;ticas virales (13), esteatosis/esteatohepatitis o hepatitis inmunoal&eacute;rgica (en relaci&oacute;n al excipiente de las preparaciones parenterales) (14). Adem&aacute;s, en los pacientes con esclerosis m&uacute;ltiple, como en el caso de nuestra paciente, debe considerarse el diagn&oacute;stico de hepatitis autoinmune cuando existe alteraci&oacute;n de los par&aacute;metros de la bioqu&iacute;mica hep&aacute;tica (15). Iancu y cols. sugirieron que la hepatomegalia tras el uso de esteroides era el resultado de la acumulaci&oacute;n reversible de gluc&oacute;geno y no tanto de la existencia de da&ntilde;o o disfunci&oacute;n hep&aacute;tica (16).</font></p>     ]]></body>
<body><![CDATA[<p><font face="Verdana" size="2">Revisando la literatura hemos encontrado &uacute;nicamente 5 casos publicados de hepatotoxidad inducida por esteroides intravenosos. Dos casos de hepatitis fulminante asociada a prednisolona, ambos con histolog&iacute;a de esteatohepatitis no alcoh&oacute;lica, a diferencia de nuestro caso (17,18).</font></p>     <p><font face="Verdana" size="2">El tercero de los casos, el de un var&oacute;n de 76 a&ntilde;os que sufri&oacute; la aparici&oacute;n de un fallo hep&aacute;tico fulminante no dispone de confirmaci&oacute;n histol&oacute;gica (19).</font></p>     <p><font face="Verdana" size="2">S&oacute;lo hemos encontrado dos casos publicados de episodios recurrentes de elevaci&oacute;n de enzimas hep&aacute;ticas en relaci&oacute;n a la administraci&oacute;n de pulsos de esteroides; el primero de ellos se trata de una mujer de 46 a&ntilde;os diagnosticada de esclerosis m&uacute;ltiple, que present&oacute; 3 episodios de elevaci&oacute;n asintom&aacute;tica de las enzimas hep&aacute;ticas tras recibir pulsos de metilprednisolona aunque durante ninguno de estos episodios se realiz&oacute; biopsia hep&aacute;tica (20). El segundo de ellos, el de una mujer de 48 a&ntilde;os con EM que present&oacute; alteraci&oacute;n de las enzimas a las 6 semanas de recibir 3 ciclos de metilprednisolona, present&oacute; cambios histol&oacute;gicos sugerentes de hepatitis inmunoal&eacute;rgica (infiltrado mixto del par&eacute;nquima hep&aacute;tico por linfocitos, eosin&oacute;filos y c&eacute;lulas plasm&aacute;ticas) (21).</font></p>     <p><font face="Verdana" size="2">En los casos citados en los que se dispuso de biopsia hep&aacute;tica, en ninguno se observ&oacute; un patr&oacute;n histol&oacute;gico como el presentado en nuestro caso.</font></p>     <p><font face="Verdana" size="2">En nuestro caso, la relaci&oacute;n temporal entre la administraci&oacute;n del f&aacute;rmaco y la aparici&oacute;n de alteraciones en la anal&iacute;tica hep&aacute;tica (de forma repetida), con posterior normalizaci&oacute;n tras la retirada del esteroide (<i>dechallenge</i> y <i>rechallenge</i>), junto con la exclusi&oacute;n de otros factores potencialmente hepatot&oacute;xicos y los hallazgos histol&oacute;gicos de la biopsia hep&aacute;tica, apoyan el diagn&oacute;stico de hepatitis aguda t&oacute;xica por esteroides. Al aplicar los algoritmos diagn&oacute;sticos de causalidad obtuvimos una puntuaci&oacute;n de 9 puntos en la escala de Naranjo (relaci&oacute;n "definitiva") y una puntuaci&oacute;n de 12 en las escala de la CIOMS (relaci&oacute;n "altamente probable"). Creemos adem&aacute;s que nuestra comunicaci&oacute;n, a diferencia del resto de casos publicados previamente, es relevante ya que, adem&aacute;s de tratarse de episodios recurrentes, representa el primer caso histol&oacute;gicamente confirmado de hepatitis aguda con necrosis asociada al uso de metilprednisolona en forma de "pulsos" intravenosos. Este hecho adquiere mayor inter&eacute;s si se tiene en cuenta que este patr&oacute;n histol&oacute;gico identifica aquellas formas que tienden a evolucionar cl&iacute;nicamente de una forma m&aacute;s desfavorable (22).</font></p>     <p><font face="Verdana" size="2">Llama la atenci&oacute;n que los casos de toxicidad hep&aacute;tica secundaria a esteroides intravenosos son poco numerosos, aunque potencialmente muy graves y en ocasiones recurrentes, por lo que es fundamental reconocer el cuadro cl&iacute;nico-histol&oacute;gico, suspender el tratamiento precozmente y tener este hecho muy presente en posteriores administraciones del f&aacute;rmaco por la posibilidad de desarrollo de fallo hep&aacute;tico asociado al patr&oacute;n de necrosis confluente (23). Adem&aacute;s, creemos que este caso ilustra la posibilidad de que un mismo f&aacute;rmaco produzca un espectro histol&oacute;gico lesivo diferente seg&uacute;n las caracter&iacute;sticas del paciente.</font></p>     <p>&nbsp;</p>     <p><font face="Verdana"><b>Bibliograf&iacute;a</b></font></p>     <!-- ref --><p><font face="Verdana" size="2">1. Ostapowicz G, Fontana RJ, Schidiot FV, et al. Results of a prospective study of acute liver failure at 17 tertiary care centers in the United States. Ann Intern Med 2002; 137: 947-54.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=5270746&pid=S1130-0108200800110001000001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p><font face="Verdana" size="2">2. Lucena, MI, Andrade RJ. 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World J Gastroenterol 2007; 13: 329-40.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=5270748&pid=S1130-0108200800110001000003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p><font face="Verdana" size="2">4. Andrade RJ, L&oacute;pez-Ortega S. Hepatitis t&oacute;xicas. Rev Esp Enferm Dig 2006; 9: 701.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=5270749&pid=S1130-0108200800110001000004&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p><font face="Verdana" size="2">5. Bakke OM, Manocchia M, De Abajo F, Kaitin KI, Lasagna L. 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Recurrent acute hepatitis in patient receiving pulsed methylprednisolone for multiple esclerosis. Indian J Gastroenterol 2006; 25: 314-6.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=5270766&pid=S1130-0108200800110001000021&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p><font face="Verdana" size="2">22. Fern&aacute;ndez-Casta&ntilde;er A, Garc&iacute;a-Cort&eacute;s M, Lucena MI, Borraz Y, Pel&aacute;ez G, Costa J, et al. An&aacute;lisis de las causas, caracter&iacute;sticas y consecuencias de la reexposici&oacute;n al f&aacute;rmaco o compuesto responsable de un episodio de hepatotoxicidad. Rev Esp Enferm Dig 2008; 100: 278-84.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=5270767&pid=S1130-0108200800110001000022&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p><font face="Verdana" size="2">23. Andrade RJ, Robles M, Ortiz N, Lucena MI. Reexposici&oacute;n en hepatotoxicidad: ¿prueba de concepto o accidente terap&eacute;utico? Rev Esp Enferm Dig 2008; 100: 255-8.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=5270768&pid=S1130-0108200800110001000023&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><p>&nbsp;</p>     <p>&nbsp;</p>     <p><font face="Verdana" size="2"><b><a href="#top"><img border="0" src="/img/revistas/diges/v100n11/seta.gif" width="15" height="17"></a> <a name="bajo"></a>Dirección para correspondencia:</b>    <br>Miguel Rivero Fernández.    <br>Servicio de Gastroenterología.    <br>Hospital Ramón y Cajal.    <br>Ctra. de Colmenar, km 9,100.    <br>28034 Madrid.    <br>e-mail: <a href="mailto:rivernautaes@yahoo.es">rivernautaes@yahoo.es</a></font></p>     ]]></body>
<body><![CDATA[<p><font face="Verdana" size="2">Recibido: 11-03-08.    <br>Aceptado: 15-07-08.</font></p>      ]]></body><back>
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