<?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>0120-9957</journal-id>
<journal-title><![CDATA[Revista colombiana de Gastroenterología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Col Gastroenterol]]></abbrev-journal-title>
<issn>0120-9957</issn>
<publisher>
<publisher-name><![CDATA[Asociación Colombiana de Gastroenterología  ]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-99572014000200005</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Hígado graso: aspectos clínicos en un centro de tercer nivel en Bogotá - período 2009-2013]]></article-title>
<article-title xml:lang="en"><![CDATA[Clinical Aspects of Fatty Liver Disease at a Tertiary Medical Center in Bogotá from 2009 to 2013]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Prieto Ortiz]]></surname>
<given-names><![CDATA[Jhon E]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez Pardo]]></surname>
<given-names><![CDATA[Santiago]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas Díaz]]></surname>
<given-names><![CDATA[Leonardo]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Huertas Pacheco]]></surname>
<given-names><![CDATA[Sandra]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Clínica Universitaria Colombia  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Fundación Universitaria Sanitas  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Clínica Univesitaria Colombia Patología y epidemiología ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>06</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>06</month>
<year>2014</year>
</pub-date>
<volume>29</volume>
<numero>2</numero>
<fpage>117</fpage>
<lpage>122</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-99572014000200005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-99572014000200005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-99572014000200005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Introducción: La enfermedad hepática grasa no alcohólica, o hígado graso (NAFLD, nonalcoholic fatty liver disease) es una de las principales causas de enfermedad hepática a nivel mundial, con una prevalencia aproximada del 30% en adultos. En nuestro medio no se conocen las características clínicas de estos pacientes. Metodología: Estudio descriptivo, retrospectivo, con revisión de historias clínicas de 266 pacientes con diagnóstico de hígado graso, de la consulta externa de hepatología, de Clínica Universitaria Colombia, desde el 1 de enero de 2009 hasta el 31 de mayo de 2013, describiendo las características clínicas. Resultados: De los 266 pacientes incluidos en el estudio, 52,3% eran hombres y 47,7% mujeres, la edad promedio de diagnóstico fue de 51,6 años. El antecedente de importancia encontrado con mayor frecuencia fue la dislipidemia, la cual se presentó en 113 pacientes (42,5%); 127 (47,8%) pacientes presentaron esteatohepatitis no alcohólica (NASH, del inglés nonalcoholic steatohepatitis), 108 (40,6%) esteatosis simple y 31 (11,6%) cirrosis; estos últimos se clasificaron de acuerdo a la escala de CHILD, encontrando: 22 (70,9%) clasificados como A, 8 (25,8%) como B y 1 (3,2%) como C. La biopsia hepática se realizó en 31 pacientes (11,6%). Conclusiones: En los pacientes con hígado graso se identificaron, frecuentemente, elementos del síndrome metabólico, siendo el principal, la dislipidemia. La mayoría se encuentran en estadios iniciales de la enfermedad, con un bajo porcentaje de pacientes cirróticos, lo cual podría sugerir una evolución más lenta de la enfermedad en nuestro medio, hipótesis que debe ser validada en otros estudios]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Introduction: Nonalcoholic fatty liver disease (NAFLD), or simply fatty liver, is a major cause of hepatic disease worldwide: its prevalence is approximately 30% in adults. In our environment the clinical characteristics of these patients are not known. Methodology: This was a descriptive and retrospective review of medical records from January 1, 2009 to May 31, 2013 of 266 patients diagnosed with fatty liver disease in the hepatology outpatient service at the Clínica Universitaria Colombia. Results: Of the 266 patients included in this study, 52.3 % were men and 47.7 % were women. The mean age at diagnosis was 51.6 years. The most frequently found antecedent of importance to the development of NAFLD was dyslipidemia which was found in 113 patients (42.5 %). 127 (47.8%) patients had nonalcoholic steatohepatitis (NASH), and 108 (40.6%) had simple steatosis. Thirty-one patients (11.6%) had cirrhosis which was classified according to CHILD scale: 22 (70.9%) were classified as A, 8 (25.8%) were classified as B, and one (3.2 %) was classified as C. Liver biopsies were taken from 31 patients (11.6%). Conclusions: Elements of metabolic syndrome, especially dyslipidemia, are often identified in our patients with FLD. Since most of these patients are in early stages of the disease with a low percentage of cirrhotic patients, it may be that the disease progresses more slowly in our environment than elsewhere. This is a hypothesis that should be validated in other studies]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Hígado graso]]></kwd>
<kwd lng="es"><![CDATA[factores de riesgo]]></kwd>
<kwd lng="es"><![CDATA[NASH]]></kwd>
<kwd lng="es"><![CDATA[NAFLD]]></kwd>
<kwd lng="es"><![CDATA[esteatosis hepática]]></kwd>
<kwd lng="es"><![CDATA[cirrosis hepática]]></kwd>
<kwd lng="es"><![CDATA[fibrosis]]></kwd>
<kwd lng="en"><![CDATA[Fatty liver]]></kwd>
<kwd lng="en"><![CDATA[risk factors]]></kwd>
<kwd lng="en"><![CDATA[NASH]]></kwd>
<kwd lng="en"><![CDATA[NAFLD]]></kwd>
<kwd lng="en"><![CDATA[hepatic steatosis]]></kwd>
<kwd lng="en"><![CDATA[liver cirrhosis]]></kwd>
<kwd lng="en"><![CDATA[fibrosis]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  <FONT FACE="Verdana" SIZE=4>    <p align="center"><b>H&iacute;gado graso: aspectos cl&iacute;nicos en un centro de tercer   nivel en Bogot&aacute; - per&iacute;odo 2009-2013</b></p></FONT> <FONT FACE="Verdana" SIZE=2>    <p align="center">Jhon E. Prieto Ortiz MD. (1), Santiago S&aacute;nchez Pardo MD. (2), Leonardo Rojas D&iacute;az MD. (2), Sandra Huertas Pacheco MD. (3) </p>     <p>(1) Gastroenter&oacute;logo, Hepat&oacute;logo, Cl&iacute;nica Universitaria   Colombia. Bogot&aacute;, Colombia.</p>     <p>(2) M&eacute;dico, Fundaci&oacute;n Universitaria Sanitas. Bogot&aacute;,   Colombia.</p>     <p>(3) Pat&oacute;loga, Epidemi&oacute;loga, Cl&iacute;nica Universitaria   Colombia. Bogot&aacute;, Colombia. </p>     <p>Fecha recibido: 11-12-13   Fecha aceptado: 08-05-14</p>     <p><b>Resumen</b></p>     <p><b>Introducci&oacute;n</b>: La enfermedad hep&aacute;tica grasa no   alcoh&oacute;lica, o h&iacute;gado graso (NAFLD, nonalcoholic fatty liver disease) es una de   las principales causas de enfermedad hep&aacute;tica a nivel mundial, con una   prevalencia aproximada del 30% en adultos. En nuestro medio no se conocen las   caracter&iacute;sticas cl&iacute;nicas de estos pacientes. </p>     <p><b>Metodolog&iacute;a</b>: Estudio descriptivo,   retrospectivo, con revisi&oacute;n de historias cl&iacute;nicas de 266 pacientes con   diagn&oacute;stico de h&iacute;gado graso, de la consulta externa de hepatolog&iacute;a, de Cl&iacute;nica   Universitaria Colombia, desde el 1 de enero de 2009 hasta el 31 de mayo de   2013, describiendo las caracter&iacute;sticas cl&iacute;nicas. </p>     ]]></body>
<body><![CDATA[<p><b>Resultados</b>: De los 266   pacientes incluidos en el estudio, 52,3% eran hombres y 47,7% mujeres, la edad   promedio de diagn&oacute;stico fue de 51,6 a&ntilde;os. El antecedente de importancia encontrado   con mayor frecuencia fue la dislipidemia, la cual se present&oacute; en 113 pacientes   (42,5%); 127 (47,8%) pacientes presentaron esteatohepatitis no alcoh&oacute;lica   (NASH, del ingl&eacute;s nonalcoholic steatohepatitis), 108 (40,6%) esteatosis simple   y 31 (11,6%) cirrosis; estos &uacute;ltimos se clasificaron de acuerdo a la escala de   CHILD, encontrando: 22 (70,9%) clasificados como A, 8 (25,8%) como B y 1 (3,2%)   como C. La biopsia hep&aacute;tica se realiz&oacute; en 31 pacientes (11,6%). </p>     <p><b>Conclusiones</b>: En   los pacientes con h&iacute;gado   graso se identificaron, frecuentemente, elementos del s&iacute;ndrome metab&oacute;lico,   siendo el principal, la dislipidemia. La mayor&iacute;a se encuentran en estadios   iniciales de la enfermedad, con un bajo porcentaje de pacientes cirr&oacute;ticos, lo   cual podr&iacute;a sugerir una evoluci&oacute;n m&aacute;s lenta de la enfermedad en nuestro medio,   hip&oacute;tesis que debe ser validada en otros estudios. </p>     <p><b>Palabras clave</b></p>     <p>H&iacute;gado graso, factores de riesgo, NASH, NAFLD,   esteatosis hep&aacute;tica, cirrosis hep&aacute;tica, fibrosis.</p>     <p><b>INTRODUCCI&Oacute;N Y DEFINICI&Oacute;N</b></p>     <p>El h&iacute;gado graso o enfermedad hep&aacute;tica grasa no   alcoh&oacute;lica (NAFLD, del ingl&eacute;s nonalcoholic fatty liver disease), entidad   descrita originalmente en los a&ntilde;os 80 por Ludwig (1), es un motivo frecuente de   consulta por transaminasas elevadas en forma asintom&aacute;tica (2,4) y una de las   principales causas de enfermedad hep&aacute;tica a nivel mundial.</p>     <p><b>Definici&oacute;n</b></p>     <p>El t&eacute;rmino de h&iacute;gado graso o NAFLD, desde el punto de   vista histol&oacute;gico, abarca un espectro que va desde la esteatosis grasa simple   (condici&oacute;n benigna), pasando por el h&iacute;gado graso, con elevaci&oacute;n de   transaminasas o esteatohepatitis no alcoh&oacute;lica (NASH, del ingl&eacute;s nonalcoholic   steatohepatitis), en la cual la esteatosis est&aacute; acompa&ntilde;ada por los fen&oacute;menos de   balonizaci&oacute;n e inflamaci&oacute;n, con fibrosis progresiva, que puede llevar hasta la   cirrosis, con sus complicaciones inherentes (2-6).</p>     <p>El h&iacute;gado graso se define como la presencia de   esteatosis hep&aacute;tica en el ultrasonido, con o sin inflamaci&oacute;n y/o fibrosis, en   ausencia de causas secundarias, mencionadas a continuaci&oacute;n (5,6): </p>     <p>- Consumo de alcohol mayor a 20 g/d&iacute;a para hombres y 10   g/d&iacute;a para mujeres. </p>     ]]></body>
<body><![CDATA[<p>- Uso de medicamentos hepatot&oacute;xicos como   (glucocorticoides, isoniazida, metrotexate, amiodarona y tamoxifeno) dentro de   los &uacute;ltimos 6 meses previos al estudio.</p>     <p>- Serolog&iacute;a positiva para hepatitis B y C. </p>     <p>- Concentraci&oacute;n de ferritina &gt;1000 mg/L. </p>     <p>- T&iacute;tulos s&eacute;ricos de anticuerpos antim&uacute;sculo liso   &gt;1:160 o anticuerpos antimitocondriales &gt;1:140.</p>     <p><b>PREVALENCIA</b></p>     <p>Se estima una prevalencia mundial del 20% al 30% en   adultos; estos valores pueden variar seg&uacute;n la poblaci&oacute;n estudiada y del m&eacute;todo   utilizado para su diagn&oacute;stico (ultrasonograf&iacute;a, biopsia hep&aacute;tica o elevaci&oacute;n de   las enzimas hep&aacute;ticas) (7-10). Es mucho m&aacute;s frecuente en pa&iacute;ses   industrializados, en donde la mayor&iacute;a de pacientes se diagnostican entre los 40   y 50 a&ntilde;os, aunque se est&aacute; incrementando el diagn&oacute;stico en la poblaci&oacute;n infantil   (11).</p>     <p>Se asocia a factores de riesgo como la obesidad y el   alcoholismo hasta en un 30%-100% de los casos, a diabetes mellitus tipo 2 entre   un 10%-75%, a dislipidemia en un 90% y al s&iacute;ndrome metab&oacute;lico (SM) en 25% (el h&iacute;gado   graso es la manifestaci&oacute;n hep&aacute;tica de este s&iacute;ndrome, el 90% de los pacientes   con NAFLD presentan al menos una caracter&iacute;stica del SM y una tercera parte   presenta todos los criterios) (3,4-6,). Es importante resaltar que la entidad   se puede presentar en pacientes sin sobrepeso (12).</p>     <p>Por otra parte, la presencia de h&iacute;gado graso se asocia   con un mayor riesgo de muerte por cualquier causa, siendo predictor de eventos   cardiovasculares futuros, independientemente de la edad, sexo, niveles de LDL,   tabaquismo y SM (13-16). Varios estudios han demostrado la asociaci&oacute;n entre la   existencia de h&iacute;gado graso con la aparici&oacute;n de diabetes, independientemente de   la presencia de factores de riesgo convencionales como: obesidad, resistencia a   la insulina y SM, lo que sugiere que la presencia de h&iacute;gado graso puede tener   relaci&oacute;n causal con la g&eacute;nesis de la diabetes, probablemente asociada a la   resistencia a la insulina a nivel hep&aacute;tico (17-20). La entidad se presenta con   una distribuci&oacute;n &eacute;tnica, siendo los hispanos los m&aacute;s afectados (58%), seguidos   de los cauc&aacute;sicos (44%) y, por &uacute;ltimo, los afroamericanos (35%) (9,13-14).   Datos recientes muestran un incremento en la incidencia en los &uacute;ltimos a&ntilde;os,   paralelo al aumento de la obesidad y la diabetes a nivel mundial, como elementos   del SM (9,13,17).</p>     <p><b>HISTORIA NATURAL</b></p>     <p>Se sabe que la esteatosis simple puede progresar a   NASH, y de all&iacute; a cirrosis. El riesgo de progresar a cirrosis, a partir de una   esteatosis simple despu&eacute;s de 10 a 20 a&ntilde;os es de 0%-4%, en contraste con un   5-10% de los pacientes que presentan NASH, los cuales pueden desarrollar   cirrosis en aproximadamente 5 a&ntilde;os (2,4-6,13,21,22). El estudio de Rahman   concluye que, aproximadamente, 20% de los casos de esteatosis grasa simple   progresan a NASH, y que de ellos, aproximadamente, el 20% progresan a cirrosis,   algunos con presencia de hepatocarcinoma (23), este &uacute;ltimo ha sido descrito, incluso, en pacientes con   NASH sin cirrosis, por lo cual se ha establecido que el h&iacute;gado graso es un   factor de riesgo para dicho tumor (23,24).</p>     ]]></body>
<body><![CDATA[<p><b>PATOGENIA</b></p>     <p>La patog&eacute;nesis del h&iacute;gado graso no ha sido   completamente dilucidada, sin embargo la teor&iacute;a m&aacute;s apoyada implica la   secuencia de dos eventos fundamentales: i) resistencia a la insulina, con una   progresiva acumulaci&oacute;n de &aacute;cidos grasos en los hepatocitos, c&uacute;mulos de l&iacute;pidos   en forma de glicerol&iacute;pidos, glicerofosfol&iacute;pidos y esteroles; y ii) alteraci&oacute;n   de la funci&oacute;n mitocondrial del hepatocito, generando acumulaci&oacute;n de los &aacute;cidos   grasos antes mencionados, incapacidad de mantener la b-oxidaci&oacute;n, disminuci&oacute;n   de la secreci&oacute;n de VLDL, aumento del estr&eacute;s oxidativo, peroxidaci&oacute;n lip&iacute;dica,   apoptosis, aumento de la respuesta inflamatoria mediada por la liberaci&oacute;n de   factor de necrosis tumoral (TNF) implicado en la balonizaci&oacute;n, fibrosis y   hialina de Mallory (3-6,25,26), disfunci&oacute;n en la se&ntilde;alizaci&oacute;n de la insulina   responsable de la peroxidaci&oacute;n lip&iacute;dica y el estr&eacute;s oxidativo, lo que causa   inflamaci&oacute;n y apoptosis, a trav&eacute;s de factores de transcripci&oacute;n y v&iacute;as de   se&ntilde;alizaci&oacute;n dependientes de cinasas (27-29).</p>     <p><b>CL&Iacute;NICA Y HALLAZGOS DE LABORATORIO</b></p>     <p>La mayor&iacute;a de los pacientes son asintom&aacute;ticos, en casos   aislados refieren astenia, adinamia y dolor en hipocondrio derecho; en fases   avanzadas la cl&iacute;nica se asocia a complicaciones de la hipertensi&oacute;n portal y la   cirrosis (2,4,6,13).</p>     <p>Las transaminasas, usualmente, se elevan en forma leve   a moderada, aunque los resultados normales no excluyen el diagn&oacute;stico. La   elevaci&oacute;n de la ALT tiene relevancia cl&iacute;nica, ya que est&aacute; demostrada como   predictor de la g&eacute;nesis de la resistencia a la insulina, diabetes mellitus,   enfermedades cardiovasculares y SM, en los pacientes con h&iacute;gado graso (30,40).   Otros hallazgos de laboratorio incluyen la elevaci&oacute;n de la fosfatasa alcalina   (FA) m&aacute;s   de 3 veces su valor normal, elevaci&oacute;n de la ferritina (31), la albumina,   bilirrubinas y tiempos de coagulaci&oacute;n, que solamente se alteran en estados de   cirrosis (6,13,32-34).</p>     <p><b>BIOPSIA HEP&Aacute;TICA</b></p>     <p>Es la mejor herramienta para la confirmaci&oacute;n del   diagn&oacute;stico, evaluaci&oacute;n de la inflamaci&oacute;n y fibrosis, y aporta informaci&oacute;n   acerca del pron&oacute;stico (6,10,32). Algunos autores sugieren que se realice en   grupos de mayor riesgo, tales como: pacientes con obesidad, diabetes mellitus,   edad mayor a 45 a&ntilde;os, una relaci&oacute;n ASAT/ALAT&gt;1, resistencia insul&iacute;nica,   hipertensi&oacute;n arterial e hipertrigliceridemia (8,22,35,36). Dadas las   limitaciones de la biopsia hep&aacute;tica y las controversias de su uso, se han   estudiado distintos biomarcadores para hacer el diagn&oacute;stico de h&iacute;gado graso   como: &#945;-fetoprote&iacute;na, niveles de ALT, GGT, &aacute;cidos grasos no   esterificados, niveles de glicemia alterados, etc., buscando determinar el   grado de fibrosis; todos ellos sin lograr igualar a la biopsia hep&aacute;tica en   cuanto informaci&oacute;n acerca del pron&oacute;stico de la enfermedad, lo que incentiva su   uso y aplicaci&oacute;n sistem&aacute;tica (32,33,35,36). Los hallazgos histol&oacute;gicos de la   enfermedad grasa hep&aacute;tica, van desde la simple infiltraci&oacute;n grasa mayor, al 5%   de los hepatocitos (clasificada como leve &#91;5%-33%&#93;, moderada &#91;34%-66%&#93; y grave   &#91;&gt;66%&#93;), hasta su asociaci&oacute;n con inflamaci&oacute;n lobular, balonizaci&oacute;n y   fibrosis (36-39).</p>     <p><b>TRATAMIENTO </b></p>     <p>El tratamiento est&aacute; basado en la modificaci&oacute;n de los   estilos de vida y los factores de riesgo, incentivando el ejercicio, la p&eacute;rdida   de peso, la dieta sana baja en calor&iacute;as, y con un seguimiento permanente para   la detecci&oacute;n temprana de fibrosis y/o cirrosis; sumado a lo anterior, se han   desarrollado terapias efectivas con m&iacute;nimos efectos adversos para controlar la   progresi&oacute;n de la enfermedad, como las intervenciones con antioxidantes   (vitamina E y C), los cuales han demostrado revertir los niveles elevados de   transaminasas, colesterol y &aacute;cido hialur&oacute;nico, aunque no mejoran los niveles   elevados de citocinas ni la inflamaci&oacute;n (4,6,18,41). La p&eacute;rdida de peso, as&iacute;   sea como factor aislado o &uacute;nico, se relaciona con una mejor&iacute;a histol&oacute;gica   (41-42). Los hipolipemiantes, como las estatinas, en el estudio europeo GREACE   (43) demostraron beneficio y mejor&iacute;a del h&iacute;gado graso, adem&aacute;s de la reducci&oacute;n   del riesgo cardiovascular.</p>     <p>Otras intervenciones incluyen sensibilizadores   perif&eacute;ricos de insulina, como las biguanidas y tiazolidinedionas, las cuales   han demostrado normalizar los niveles de transaminasas; la respuesta   inflamatoria y la esteatosis hep&aacute;tica. Los inhibidores del receptor de   angiotensina II (ARA II); el &aacute;cido ursodesoxic&oacute;lico; la L-carnitina, encargada   del transporte lip&iacute;dico a nivel mitocondrial; y la administraci&oacute;n de   probi&oacute;ticos, al reducir la translocaci&oacute;n bacteriana intestinal, disminuyen la   respuesta inflamatoria a nivel hep&aacute;tico (44-50). Las intervenciones   quir&uacute;rgicas, como la cirug&iacute;a bari&aacute;trica, espec&iacute;ficamente la combinaci&oacute;n de la   variedad restrictiva y malabsortiva, con la t&eacute;cnica de bypass g&aacute;strico en Y de   Roux, con la t&eacute;cnica modificada de Fobi-Capella, han mostrado beneficio y   mejor&iacute;a de la inflamaci&oacute;n, la cual es demostrada mediante la biopsia hep&aacute;tica   (51).</p>     ]]></body>
<body><![CDATA[<p>Desconocemos, en nuestro medio (Cl&iacute;nica Universitaria   Colombia), las caracter&iacute;sticas cl&iacute;nicas de los pacientes con diagn&oacute;stico de   h&iacute;gado graso y la relaci&oacute;n con enfermedades metab&oacute;licas. No se tienen   estad&iacute;sticas propias y, por lo tanto, tampoco datos epidemiol&oacute;gicos. Los que   manejamos son basados en literatura internacional. Por lo anterior, el presente   estudio describe las caracter&iacute;sticas cl&iacute;nicas del h&iacute;gado graso en una serie de   266 pacientes.</p>     <p><b>OBJETIVO</b></p>     <p>Describir las caracter&iacute;sticas cl&iacute;nicas de 266 pacientes   con diagn&oacute;stico de h&iacute;gado graso, que consultaron al servicio de hepatolog&iacute;a de   la Cl&iacute;nica Universitaria Colombia, durante el per&iacute;odo de estudio, en Bogot&aacute;.</p>     <p><b>METODOLOG&Iacute;A </b></p>     <p>Se revisaron las historias cl&iacute;nicas de los pacientes   con diagn&oacute;stico de h&iacute;gado graso, que asistieron a consulta externa del Servicio   de Hepatolog&iacute;a de la Cl&iacute;nica Universitaria Colombia, durante el per&iacute;odo   comprendido entre el 1 de enero de 2009 y el 31 de mayo de 2013. Se realiz&oacute; el   an&aacute;lisis descriptivo de cada una de las variables de estudio. Para las   variables continuas, se estimaron promedios y desviaciones est&aacute;ndar; para las   variables categ&oacute;ricas, se estimaron proporciones y se presentaron en textos,   tablas y/o gr&aacute;ficas, empleando Excel y SPSS.</p>     <p><b>Dise&ntilde;o, poblaci&oacute;n y definici&oacute;n de variables</b></p>     <p>Estudio descriptivo, retrospectivo, con revisi&oacute;n de las   historias cl&iacute;nicas de pacientes adultos con diagn&oacute;stico de h&iacute;gado graso, que   asistieron a consulta de hepatolog&iacute;a de la Cl&iacute;nica Universitaria Colombia. Se   incluyeron &uacute;nicamente aquellos pacientes en los que se conoc&iacute;a el diagn&oacute;stico   de h&iacute;gado graso, basados en hallazgos ecogr&aacute;ficos y/o elevaci&oacute;n de   transaminasas y/o biopsia hep&aacute;tica. Se agruparon y tabularon las   caracter&iacute;sticas demogr&aacute;ficas, el motivo de remisi&oacute;n del paciente, los   antecedentes referidos en la historia cl&iacute;nica, los datos del examen f&iacute;sico y   las pruebas de laboratorio.</p>     <p><b>Consideraciones &eacute;ticas</b></p>     <p>Este es un estudio retrospectivo que utiliz&oacute; datos de   las historias cl&iacute;nicas de pacientes. No se realiz&oacute; ninguna intervenci&oacute;n o   modificaci&oacute;n intencionada de las variables biol&oacute;gicas, fisiol&oacute;gicas,   psicol&oacute;gicas o sociales de los individuos. Se condujo de acuerdo con los principios   declarados en la XVIII Asamblea M&eacute;dica Mundial (Helsinki, 1964). Los datos de   identificaci&oacute;n de los pacientes incluidos, as&iacute; como sus diagn&oacute;sticos, no fueron   consignados dentro de las publicaciones. El grupo de investigadores manej&oacute; con   total confidencialidad los datos de historia cl&iacute;nica.</p>     <p><b>RESULTADOS</b></p>     ]]></body>
<body><![CDATA[<p>De 266 pacientes con diagn&oacute;stico de h&iacute;gado graso, la   edad promedio fue de 51,6 a&ntilde;os (13-86 a&ntilde;os) con   la siguiente distribuci&oacute;n por grupos de edad: 13-29 a&ntilde;os: 15 pacientes, 30-45   a&ntilde;os: 61 pacientes, 46-65 a&ntilde;os: 126 pacientes, 66-86 a&ntilde;os: 38 pacientes (<a href="#figura1">figura   1</a>). La distribuci&oacute;n por g&eacute;nero mostr&oacute; 139 pacientes hombres (52,3%) y 127   mujeres (47,7%). Los principales motivos de remisi&oacute;n a la consulta por   hepatolog&iacute;a fueron: remisi&oacute;n con diagn&oacute;stico de h&iacute;gado graso en 129 pacientes   (48,5%), transaminasas elevadas en 59 pacientes (22,2%), cirrosis en 17   pacientes (6,4%), ictericia en 9 (3,4%), sangrado varicial en 4 (1,5%), masa   hep&aacute;tica en 3 (1,1%) y otros en 45 (16,9%) (<a href="#tabla1">tabla 1</a>). Los par&aacute;metros de   laboratorio al ingreso a consulta de los pacientes se presentan en la <a href="#tabla2">tabla 2</a>.   De estos par&aacute;metros cabe destacar la media de las transaminasas, la cual se   encuentra en 65 y 46 U/L para ALT y AST, respectivamente, con valores tan altos   como 290 y 272 U/L. El colesterol y triglic&eacute;ridos presentaron medias de 208 y   196, con valores m&aacute;ximos de 373 y 640 mg/dL, respectivamente. Los valores de   glicemia en ayunas se encontraron en un valor promedio de 108,2 mg/dL y con un   valor m&aacute;ximo de 369 mg/dL. Las caracter&iacute;sticas demogr&aacute;ficas de los pacientes se   presentan en la <a href="#tabla1">tabla 1</a>.</p>     <p align="center"><img src="img/revistas/rcg/v29n2/v29n2a05f1.jpg" width="430" height="330"><a name="figura1"></a></p>     <p align="center"><img src="img/revistas/rcg/v29n2/v29n2a05t1.jpg" width="430" height="365"><a name="tabla2"></a></p>     <p align="center"><img src="img/revistas/rcg/v29n2/v29n2a05t2.jpg" width="580" height="325"><a name="figura2"></a></p>     <p><b>Antecedentes personales relacionados con enfermedades   metab&oacute;licas y cardiovasculares e h&iacute;gado graso</b></p>     <p>Dentro de los antecedentes de importancia relacionados   con h&iacute;gado graso y SM se encontr&oacute;: dislipidemia en 113 pacientes (42,5%),   hipertensi&oacute;n arterial en 56 (21,1%), diabetes mellitus en 46 (16%), obesidad en   38 (14,3%) y enfermedad coronaria en 4 (1,5%). Algunos de los pacientes   presentan m&aacute;s de un antecedente. El &iacute;ndice de masa corporal (IMC) de los pacientes   tiene una media de 27 kg/m2, con valores tan altos como 45 kg/m2, valor que   denota la presencia de sobrepeso y obesidad (<a href="#figura2">figura 2</a>).</p>     <p align="center"><img src="img/revistas/rcg/v29n2/v29n2a05f2.jpg" width="430" height="350"></p>     <p><b>Clasificaci&oacute;n cl&iacute;nica de la enfermedad hep&aacute;tica</b></p>     <p>De los 266 pacientes con diagn&oacute;stico de h&iacute;gado graso o   NAFLD se encontr&oacute; que 127 (47,8%) presentaban NASH, 108 (40,6%) esteatosis   simple y 31 (11,6%) cirrosis, estos &uacute;ltimos se clasificaron de acuerdo a la   escala de CHILD, encontrando 22 (70,9%) clasificados como A, 8 (25,8%) como B y   1 (3,2%) como C.</p>     <p><b>Biopsia hep&aacute;tica</b></p>     ]]></body>
<body><![CDATA[<p>Se realiz&oacute; en 31 pacientes (11,6%), de los cuales 20   (64,5%) ten&iacute;an diagn&oacute;stico de cambio graso no significativo o esteatosis simple   (&lt;5%), 4 (12,9%) NASH y cirrosis en 7 pacientes, que representan el (22,6%).   Los datos se presentan en la <a href="#figura3">figura 3</a>.</p>     <p align="center"><img src="img/revistas/rcg/v29n2/v29n2a05f3.jpg" width="430" height="379"><a name="figura3"></a></p>     <p><b>DISCUSI&Oacute;N</b></p>     <p>Para esta serie, la edad promedio de los pacientes fue   de 51,3 a&ntilde;os, y el grupo con un mayor n&uacute;mero de pacientes diagnosticados fue el   de los 46-65 a&ntilde;os; dato que coincide con estudios internacionales, en donde la   edad promedio de diagn&oacute;stico es entre los 40 y 50 a&ntilde;os. La distribuci&oacute;n por   g&eacute;nero se comport&oacute; de manera similar, siendo m&aacute;s frecuente el diagn&oacute;stico en   hombres, que en mujeres, con 52,3% y 47,7%, respectivamente (5,6,10). Se   encontr&oacute; dislipidemia en el 42,5% de los pacientes, hipertensi&oacute;n arterial en el   21,1%, diabetes en el 16%, obesidad en el 14,3% y enfermedad coronaria en el   1,5% (todos ellos, factores del s&iacute;ndrome metab&oacute;lico), reflejando la relaci&oacute;n   descrita en la literatura entre el h&iacute;gado graso y las enfermedades metab&oacute;licas   (6-26). Solo en 1,5% de los pacientes se encontr&oacute; el antecedente de enfermedad   coronaria. En cuanto a los hallazgos de laboratorio se encontraron valores de   transaminasas y l&iacute;pidos, que concuerdan con los referidos en la literatura   internacional (5,30,40).</p>     <p>La cirrosis se encontr&oacute; en 31 pacientes (11,6%),   diagnosticada por la cl&iacute;nica, la mayor&iacute;a de ellos se encontraban en CHILD A.   Por histolog&iacute;a, en un grupo de pacientes muy seleccionados (n=31), el mismo   diagn&oacute;stico se encontr&oacute; en el 22,6%. Aunque estos datos permitir&iacute;an pensar en   una cirrosis, de relativa benignidad, en la historia natural del h&iacute;gado graso,   hay que recordar que en la actualidad es una enfermedad que afecta hasta un 30%   de la poblaci&oacute;n mundial y alerta sobre un posible diagn&oacute;stico tard&iacute;o del   cuadro, con lo cual se debe enfatizar en medidas de diagn&oacute;stico precoz y   prevenci&oacute;n de la enfermedad (4,6,13). Como dato final, cabe resaltar que ning&uacute;n   paciente tuvo diagn&oacute;stico de hepatocarcinoma, aunque el riesgo de presentaci&oacute;n   en este grupo de pacientes est&aacute; descrito; y al paciente cirr&oacute;tico por h&iacute;gado   graso, se le debe hacer el tamizaje para esta entidad, cada 6 meses.</p>     <p>En conclusi&oacute;n, se encontr&oacute; una alta frecuencia de   factores del s&iacute;ndrome metab&oacute;lico en nuestros pacientes con NAFLD. Se deben   generar estudios prospectivos, que aporten directrices en muestro medio,   encaminadas a la detecci&oacute;n e intervenci&oacute;n precoz de la enfermedad.</p>     <p><b>REFERENCIAS</b></p>     <!-- ref --><p>1. Ludwig J, Viggiano TR, McGill DB, Oh BJ. Nonalcoholic   steatohepatitis: Mayo Clinic experiences with a hitherto unnamed disease. 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