<?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>2072-8174</journal-id>
<journal-title><![CDATA[Revista del Nacional (Itauguá)]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Nac. (Itauguá)]]></abbrev-journal-title>
<issn>2072-8174</issn>
<publisher>
<publisher-name><![CDATA[Hospital Nacional (Itauguá)]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2072-81742011000200002</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[La Enfermedad celiaca en el Paraguay]]></article-title>
<article-title xml:lang="en"><![CDATA[Coeliac disease in Paraguay]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Real Delor]]></surname>
<given-names><![CDATA[Raúl Emilio]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arza]]></surname>
<given-names><![CDATA[Gloria]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chamorro]]></surname>
<given-names><![CDATA[María Elena]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dalles]]></surname>
<given-names><![CDATA[Idalina]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ibarra Douglas]]></surname>
<given-names><![CDATA[Andrea]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Médico Especialista en Medicina Interna  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Médica Especialista en Pediatría  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A03">
<institution><![CDATA[,Doctora en Bioquímica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A04">
<institution><![CDATA[,Fundación Paraguaya de Celiacos Licenciada en Nutrición ]]></institution>
<addr-line><![CDATA[Asunción ]]></addr-line>
<country>Paraguay</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2011</year>
</pub-date>
<volume>3</volume>
<numero>2</numero>
<fpage>7</fpage>
<lpage>15</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_arttext&amp;pid=S2072-81742011000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_abstract&amp;pid=S2072-81742011000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_pdf&amp;pid=S2072-81742011000200002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Introducción: la Enfermedad celiaca (EC) es una enteropatía inducida por el gluten de la dieta en personas genéticamente susceptibles y en quienes produce lesiones características en la mucosa intestinal, que llevan a un estado de malabsorción. Objetivos: describir las características demográficas y clínicas de los portadores de EC en el Paraguay y comparar las formas de presentación clínica entre niños/adolescentes y adultos. Material y métodos: estudio observacional, retrospectivo, descriptivo y analítico de datos de filiación y características clínicas al momento del diagnóstico de la EC en personas que concurrieron a la Fundación Paraguaya de Celiacos entre 1995 y octubre 2011. Fueron incluidos 656 adultos y niños con cuadro clínico, serología específica y biopsia duodenal compatibles con EC. Resultados: predominaron celiacos del sexo femenino (72,4%), la edad media fue 25±18 años. Las diarreas crónicas fueron la causa más frecuente de consulta (62,7%). La Dermatitis herpetiforme se presentó en 33,8%, las formas familiares en 17,6%. La tiroiditis crónica autoinmune acompaña al 6,6% de los casos. Conclusiones: la EC se presentó en el Paraguay con sobre todo en el sexo femenino, debut a diferentes edades, con predominio de la forma clásica de diarreas crónicas (62,7%).]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Introduction: Celiac disease (CD) is an enteropathy induced by dietary gluten in genetically susceptible individuals and produce characteristic lesions in the intestinal mucosa, leading to a state of malabsorption. Objectives: To describe the demographic and clinical characteristics of carriers of CD in Paraguay and compare clinical presentation between children/adolescents and adults. Material and Methods: observational, retrospective, descriptive and analytical study from affiliation and clinical data at the time of diagnosis of CD in people who attended the Paraguayan Coeliac Foundation between 1995 and October 2011. We included 656 adults and children with clinical symptoms, specific serology and duodenal biopsy compatible with CD. Results: there was a female predominance (72.4%), the mean age was 25 ± 18 years. Chronic diarrheas were the most frequent cause of consultation (62.7%). Dermatitis herpetiformis occurred in 33.8% and family forms in 17.6%. Chronic autoimmune thyroiditis was found in 6.6% of cases. Conclusions: CD is presented in Paraguay mostly in women, debut at different ages, with predominantly classic form of chronic diarrhea (62.7%).]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Palabras claves: enfermedad celiaca; síndrome malabsorción intestinal; dermatitis herpetiforme; Paraguay]]></kwd>
<kwd lng="en"><![CDATA[Key word: coeliac disease, chronic diarrhea, intestinal malabsorption syndrome, dermatitis herpetiformis; Paraguay]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="right"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">ART&Iacute;CULO ORIGINAL</font></p>     <p>&nbsp;</p>     <p><font size="4" face="Verdana, Arial, Helvetica, sans-serif"><b>La Enfermedad celiaca en el Paraguay</b></font></p>     <p>&nbsp;</p>    <p>&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>Coeliac disease in Paraguay</b></font></p>     <p>&nbsp;</p>    <p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b><a name="autor"></a><a href="#corres">*</a>Ra&uacute;l Emilio Real Delor<SUP>(1)</SUP>, Gloria Arza<SUP>(2)</SUP>, Mar&iacute;a Elena Chamorro<SUP>(3)</SUP>, Idalina Dalles<SUP>(3)</SUP>, Andrea Ibarra Douglas<SUP>(4)</SUP></b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">1. M&eacute;dico Especialista en Medicina Interna    ]]></body>
<body><![CDATA[<br> 2. M&eacute;dica Especialista en Pediatr&iacute;a    <br> 3. Doctora en Bioqu&iacute;mica    <br> 4. Licenciada en Nutrici&oacute;n. Fundaci&oacute;n Paraguaya de Celiacos. Asunci&oacute;n, Paraguay (<a href="http://www.fupacel.org.py">www.fupacel.org.py</a>)    <br> Art&iacute;culo recibido: 05 de septiembre de 2011. Aprobado: 20 de octubre de 2011.</font></p>     <p>&nbsp;</p> <hr size="1" noshade>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>RESUMEN</b></font></p>      <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Introducci&oacute;n:</b> la Enfermedad celiaca (EC) es una enteropat&iacute;a inducida por el gluten de la dieta en personas gen&eacute;ticamente susceptibles y en quienes produce lesiones caracter&iacute;sticas en la mucosa intestinal, que llevan a un estado de malabsorci&oacute;n. <B>Objetivos:</B> describir las caracter&iacute;sticas demogr&aacute;ficas y cl&iacute;nicas de los portadores de EC en el Paraguay y comparar las formas de presentaci&oacute;n cl&iacute;nica entre ni&ntilde;os/adolescentes y adultos. <B>Material y m&eacute;todos:</B> estudio observacional, retrospectivo, descriptivo y anal&iacute;tico de datos de filiaci&oacute;n y caracter&iacute;sticas cl&iacute;nicas al momento del diagn&oacute;stico de la EC en personas que concurrieron a la Fundaci&oacute;n Paraguaya de Celiacos entre 1995 y octubre 2011. Fueron incluidos 656 adultos y ni&ntilde;os con cuadro cl&iacute;nico, serolog&iacute;a espec&iacute;fica y biopsia duodenal compatibles con EC. <B>Resultados:</B> predominaron celiacos del sexo femenino (72,4%), la edad media fue 25±18 a&ntilde;os. Las diarreas cr&oacute;nicas fueron la causa m&aacute;s frecuente de consulta (62,7%). La Dermatitis herpetiforme se present&oacute; en 33,8%, las formas familiares en 17,6%. La tiroiditis cr&oacute;nica autoinmune acompa&ntilde;a al 6,6% de los casos. <B>Conclusiones:</B> la EC se present&oacute; en el Paraguay con sobre todo en el sexo femenino, debut a diferentes edades, con predominio de la forma cl&aacute;sica de diarreas cr&oacute;nicas (62,7%).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Palabras claves:</b> enfermedad celiaca; s&iacute;ndrome malabsorci&oacute;n intestinal; dermatitis herpetiforme; Paraguay.</font></p> <hr size="1" noshade>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>ABSTRACT</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Introduction:</b> Celiac disease (CD) is an enteropathy induced by dietary gluten in genetically susceptible individuals and produce characteristic lesions in the intestinal mucosa, leading to a state of malabsorption. <B>Objectives:</B> To describe the demographic and clinical characteristics of carriers of CD in Paraguay and compare clinical presentation between children/adolescents and adults. <B>Material and Methods:</B> observational, retrospective, descriptive and analytical study from affiliation and clinical data at the time of diagnosis of CD in people who attended the Paraguayan Coeliac Foundation between 1995 and October 2011. We included 656 adults and children with clinical symptoms, specific serology and duodenal biopsy compatible with CD. <B>Results:</B> there was a female predominance (72.4%), the mean age was 25 ± 18 years. Chronic diarrheas were the most frequent cause of consultation (62.7%). Dermatitis herpetiformis occurred in 33.8% and family forms in 17.6%. Chronic autoimmune thyroiditis was found in 6.6% of cases. <B>Conclusions:</B> CD is presented in Paraguay mostly in women, debut at different ages, with predominantly classic form of chronic diarrhea (62.7%).</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Key word:</b> coeliac disease, chronic diarrhea, intestinal malabsorption syndrome, dermatitis herpetiformis; Paraguay.</font></p> <hr size="1" noshade>     <p>&nbsp;</p>    <p>&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>INTRODUCCION</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La Enfermedad celiaca (EC) es una enteropat&iacute;a inducida por el gluten de la dieta en personas gen&eacute;ticamente susceptibles y en quienes produce lesiones caracter&iacute;sticas en la mucosa intestinal, que llevan a un estado de malabsorci&oacute;n. El gluten desencadenante de esta enfermedad se encuentra en el trigo, avena, cebada  y centeno.<SUP>1-3</SUP></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La prevalencia de la EC es m&aacute;s elevada en europeos donde alcanza proporciones del 2 % en la poblaci&oacute;n general. En los Estados Unidos es tan frecuente como en Europa: 0,5 - 2%.<SUP>4,5</SUP> En Sudam&eacute;rica es propio de sujetos con ascendencia mediterr&aacute;nea.<SUP>6,7 </SUP>Estudios recientes est&aacute;n hallando casos a&uacute;n en chinos, raza que se cre&iacute;a no portaba el gen predisponente.<SUP>8</SUP></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La EC es en general m&aacute;s frecuente en las mujeres, con una  relaci&oacute;n 7:3.<SUP>9 </SUP>Estudios gen&eacute;ticos demuestran que la EC aparece en sujetos susceptibles y portadores del ant&iacute;geno de histocompatibilidad HLA-DQ2 en el 90 % y HLA-DQ8 en el 10 % restante. La concordancia de la EC entre gemelos monocig&oacute;ticos es superior al 70 % en comparaci&oacute;n al 20 -30 % entre hermanos que han heredado el mismo HLA.<SUP>10-12</SUP></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En relaci&oacute;n a la patogenia, recientemente se ha comprobado la existencia de una prote&iacute;na de peso molecular de 47 KDa denominada zonulina que es producida por los enterocitos y posee capacidad de modificar el funcionamiento de las uniones intercelulares densas de los enterocitos o z&oacute;nula occludens.<SUP> </SUP>La zonulina est&aacute; involucrada en la patogenia del estadio inicial de la EC, al demostrarse que la gliadina activa la liberaci&oacute;n de zonulina en el epitelio intestinal normal de sujetos gen&eacute;ticamente susceptibles. Esta mol&eacute;culas de gliadina pasan intactas a trav&eacute;s de la z&oacute;nula occludens incompetente y alcanzan los macr&oacute;fagos con el gen HLA y activan a los linfocitos de la submucosa. As&iacute; tambi&eacute;n ingresar&iacute;an al cuerpo otros ant&iacute;genos desencadenantes de otras enfermedades autoinmunes como la diabetes mellitus tipo 1, tiroiditis cr&oacute;nica, hepatitis autoinmune, colagenosis. Al activarse los linfocitos, se inicia una cascada inflamatoria que lesiona la mucosa intestinal.<SUP>13,14</SUP></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Los s&iacute;ntomas de la EC se manifiestan cl&aacute;sicamente en la ni&ntilde;ez, pero hay otro pico de aparici&oacute;n en la edad adulta: entre los 30 y 50 a&ntilde;os,  aunque se conocen casos de diagn&oacute;stico reci&eacute;n a los 60 y 70 a&ntilde;os.<SUP>15-17</SUP></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El retraso en el diagn&oacute;stico puede durar de 7 a 17 a&ntilde;os pero se citan 28 a&ntilde;os de retraso.<SUP>18</SUP> Esto se debe a que existe un amplio espectro cl&iacute;nico de EC que se agrupa en las siguientes formas cl&iacute;nicas:<SUP>19-24</SUP></font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>a) <I>EC manifiesta</I>:</b> es la que se presenta con s&iacute;ntomas. La forma cl&aacute;sica o t&iacute;pica se presentan con diarreas cr&oacute;nicas con esteatorrea, meteorismo, dolor abdominal difuso, p&eacute;rdida de peso y desnutrici&oacute;n.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En algunos pacientes la presentaci&oacute;n es at&iacute;pica: anemia ferrop&eacute;nica, dispepsia, estre&ntilde;imiento, estatura baja, dificultad para subir de peso, aftas bucales a repetici&oacute;n, manifestaciones ginecol&oacute;gicas como menarca tard&iacute;a, retraso del desarrollo puberal, menopausia precoz, infertilidad, reci&eacute;n nacidos con defectos del tubo neural.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>b) <I>EC latente</I>:</b> es la observada en pacientes celiacos que realizaron una dieta libre de gluten por lo que no tienen s&iacute;ntomas, los marcadores serol&oacute;gicos son negativos y la biopsia intestinal es normal o presenta alg&uacute;n grado de atrofia. Pero el cuadro cl&iacute;nico puede aflorar en cualquier momento al ingerir un m&iacute;nimo de gluten.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>c) <I>EC silente &oacute; subcl&iacute;nica</I>:</b> en ella el sujeto portador de EC est&aacute; asintom&aacute;tico a pesar de consumir gluten, presenta los anticuerpos elevados y las lesiones intestinales caracter&iacute;sticas (desde infiltraci&oacute;n de linfocitos intraepiteliales hasta atrofia vellositaria total). Se trata sobre todo de adolescentes y adultos, que pueden ser reconocidos por ser familiares consangu&iacute;neos de conocidos celiacos o por pertenecer a los grupos de riesgo de esta enfermedad. La causa de la forma silente es la afectaci&oacute;n parcelar de las lesiones intestinales, que son compensadas por el intestino delgado distal.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Existen numerosas enfermedades asociadas a la EC debido sobre todo a causas gen&eacute;ticas: d&eacute;ficit cong&eacute;nito y selectivo de IgA, enfermedades autoinmunes (diabetes mellitus tipo 1, tiroiditis cr&oacute;nicas autoinmunes, hepatitis autoinmune, adrenalitis autoinmune, lupus eritematoso sist&eacute;mico, artritis reumatoide), enfermedades al&eacute;rgicas (asma bronquial, dermatitis at&oacute;picas), afecciones dermatol&oacute;gicas<SUP> </SUP> (dermatitis herpetiforme, psoriasis, alopecia areata, vitiligo).<SUP>25-32</SUP></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Debido a que la gran mayor&iacute;a de las personas afectas de EC se halla en forma oligosintom&aacute;tica o silente, las gu&iacute;as y consensos recomiendan investigar a aquellas que con mayor probabilidad presentar&iacute;an la enfermedad.<SUP>33,34</SUP> Dichas personas constituyen los llamados grupos de riesgo de EC, ya que tienen una prevalencia m&aacute;s alta de esta enfermedad que la poblaci&oacute;n general. Estos grupos son:</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">1- Familiares consangu&iacute;neos de EC: con prevalencia de EC  entre 8,3 y 30 %.    <br> 2- Pacientes con enfermedades autoinmunes (diabetes mellitus tipo 1, tiroiditis de Hashimoto, hepatitis autoinmune, adrenalitis autoinmune, colagenosis): se asocian a EC entre 6,7 % y 30 %.    <br> 3- S&iacute;ndrome de Down, s&iacute;ndrome de Turner, s&iacute;ndrome de William.    <br> 4- Dermatitis herpetiforme.    ]]></body>
<body><![CDATA[<br> 5- Sujetos de baja estatura, anemia ferrop&eacute;nica de causa no explicada o refractaria al tratamiento, amenorrea, esterilidad, dispepsia, diarreas, constipaci&oacute;n, S&iacute;ndrome de intestino irritable, p&eacute;rdida de peso o fatiga cr&oacute;nica de causas no obvias.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El diagn&oacute;stico de EC se realiza teniendo alta sospecha de esta afecci&oacute;n y solicitando los marcadores serol&oacute;gicos de anticuerpos contra la gliadina, endomisio, transglutaminasa tisular y reticulina, cada uno con diferente sensibilidad y especificidad. Actualmente, la detecci&oacute;n serol&oacute;gica del anticuerpo IgA antitransglutaminasa es la m&aacute;s recomendada por ser una prueba altamente espec&iacute;fica y sensible, objetiva en su interpretaci&oacute;n y de menor costo. Concomitantemente se debe solicitar la medici&oacute;n del valor de la IgA s&eacute;rica, debido a la frecuente presencia de d&eacute;ficit cong&eacute;nito de IgA en los celiacos, que podr&iacute;a dar falsos resultados negativos en la determinaci&oacute;n propuesta.<SUP>35-39</SUP></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El diagn&oacute;stico definitivo se realiza con los hallazgos histol&oacute;gicos obtenidos con la biopsia duodenal, donde se observa el infiltrado linfoplasmocitario de la mucosa, la atrofia de las microvellosidades intestinales y la hiperplasia de las gl&aacute;ndulas submucosas (<a href="#2a02f1">fotos 1</a> y <a href="#2a02f2">2</a>). El diagn&oacute;stico se reconfirma con la mejor&iacute;a cl&iacute;nica tras la supresi&oacute;n total del gluten en la dieta.<SUP>33,34,40</SUP></font></p>     <p>&nbsp;</p>     <p align="center"><a name="2a02f1"></a><img src="/img/revistas/hn/v3n2/2a02f1.jpg">     <p>&nbsp;</p>     <p align="center"><a name="2a02f2"></a><img src="/img/revistas/hn/v3n2/2a02f2.jpg">     <p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En el Paraguay existe desde el a&ntilde;o 1995 la Fundaci&oacute;n Paraguaya de Celiacos (<a href="http://www.fupacel.org.py">www.fupacel.org.py</a>) cuyo objetivo principal es mejorar la calidad de vida de los celiacos. Cuando &eacute;stos concurren a la misma, son censados con sus datos cl&iacute;nicos, se les explica su condici&oacute;n de salud, se les instruye en la dieta sin gluten, reciben gu&iacute;as de alimentos y medicamentos aptos, participan en clases de cocina y los ni&ntilde;os asisten a talleres l&uacute;dicos-educativos para integrarlos a la sociedad. Se ha demostrado que los grupos de autoayuda y contenci&oacute;n emocional aportan mucho para sobrellevar esta condici&oacute;n de vida.<SUP>41-44</SUP></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El prop&oacute;sito de este estudio es llamar la atenci&oacute;n de la comunidad m&eacute;dica del pa&iacute;s de las formas de presentaci&oacute;n cl&iacute;nica de la EC. La detecci&oacute;n de las formas cl&iacute;nicas poco evidentes es muy importante porque con el tratamiento de la EC mejora el pron&oacute;stico, se previenen complicaciones graves como las neoplasias del tubo digestivo<B>(linfomas y carcinomas)</B>, osteoporosis, enfermedades autoinmunes y otras enfermedades asociadas.<SUP>45-49 </SUP>En suma, la calidad de vida del celiaco cambia totalmente tras su diagn&oacute;stico, con una permanente y estricta dieta libre de gluten.</font></p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>OBJETIVOS</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">• Describir las caracter&iacute;sticas demogr&aacute;ficas y cl&iacute;nicas de los sujetos con EC registrados en la Fundaci&oacute;n Paraguaya de Celiacos (FUPACEL).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">• Comparar las formas de presentaci&oacute;n cl&iacute;nica entre adultos y ni&ntilde;os/adolescentes.</font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>MATERIAL  Y  METODO</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Dise&ntilde;o:</b> para el primer objetivo se realiz&oacute; un estudio observacional, retrospectivo, de corte transverso. Para el segundo objetivo se utiliz&oacute; un dise&ntilde;o de cohortes transversal.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Poblaci&oacute;n de estudio:</b> varones y mujeres, de todas las edades, portadores de EC, que concurren a la Fundaci&oacute;n Paraguaya de Celiacos desde el a&ntilde;o 1995 hasta octubre 2011. Las cohortes se realizaron en base a la edad: la cohorte 1 correspondi&oacute; a los ni&ntilde;os y adolescentes hasta los 18 a&ntilde;os y la cohorte 2 a los celiacos mayores de 18 a&ntilde;os.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Criterios de inclusi&oacute;n:</b> EC confirmada con biopsia duodenal.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Muestreo:</b> no probabil&iacute;stico, de casos consecutivos.</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Reclutamiento:</b> las variables fueron extra&iacute;das de los archivos de la Fundaci&oacute;n Paraguaya de Celiacos, donde constan los datos demogr&aacute;ficos y cl&iacute;nicos de los asociados, llenados por ellos mismos, una vez confirmada la EC.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Mediciones:</b> datos de filiaci&oacute;n, s&iacute;ntomas relacionados a la EC, presencia de enfermedades asociadas.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Asuntos estad&iacute;sticos: </b>La estimaci&oacute;n del tama&ntilde;o de la muestra se realiz&oacute; con el programa estad&iacute;stico Epi Info 2000.  Para el estudio descriptivo se esper&oacute; una  prevalencia de diarreas cr&oacute;nicas de 50%<SUP> 1-5 </SUP>en un universo de 1036 celiacos, una precisi&oacute;n de 5%  y un nivel de confianza de 95%, resultando  un tama&ntilde;o de muestra de al menos 280 sujetos</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Para el dise&ntilde;o de cohortes se esper&oacute; una frecuencia de la forma cl&aacute;sica de presentaci&oacute;n en 60% de los ni&ntilde;os y en 30% de los adultos.<SUP>50</SUP> Para un error alfa de 5%, error beta 10%, relaci&oacute;n entre cohortes 1:1, el tama&ntilde;o m&iacute;nimo de casos por cohorte fue 62 sujetos como m&iacute;nimo.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Gesti&oacute;n de datos:</b> los datos se registraron en planilla electr&oacute;nica Microsoft Excel<SUP>&copy;</SUP>. Luego fueron sometidas a estad&iacute;stica descriptiva para estudiar las medidas de tendencia central y las proporciones. Para analizar las diferencias entre las caracter&iacute;sticas cl&iacute;nicas de la EC entre ni&ntilde;os y adultos, se realiz&oacute; una comparaci&oacute;n de variables cuantitativas con la prueba de ANOVA y la comparaci&oacute;n de variables cualitativas con la prueba de Chi<SUP>2</SUP>, del programa Epi Info 2000<SUP>&copy;</SUP>. Se calcul&oacute; el RR y se consider&oacute; significativa toda p&lt;0,05.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Asuntos &eacute;ticos.</b> se respetaron los  principios b&aacute;sicos de la Bio&eacute;tica. Se protegi&oacute; al m&aacute;ximo la confidencialidad.  No existen conflictos de intereses.</font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>RESULTADOS</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En 16 a&ntilde;os de funcionamiento de FUPACEL, fueron registrados 1036 celiacos hasta octubre 2011. La incidencia en los &uacute;ltimos cinco a&ntilde;os fue 5-10 casos nuevos por mes (<a href="#2a02g1">gráfico 1</a>).</font></p>     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p align="center"><a name="2a02g1"></a><img src="/img/revistas/hn/v3n2/2a02g1.jpg">     <p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Para describir las caracter&iacute;sticas demogr&aacute;ficas y cl&iacute;nicas, fueron utilizados 656 registros con datos completos.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Predominaron los sujetos del sexo femenino: 475 casos (72,4%). Proceden de numerosas ciudades de todo el pa&iacute;s, aunque la mayor&iacute;a son de Asunci&oacute;n: 381 casos (41,2%). La edad media de toda la muestra fue 25±18 a&ntilde;os (rango 1-83 a&ntilde;os). La mediana del retraso en el diagn&oacute;stico fue 3 a&ntilde;os (rango 1-57 a&ntilde;os). Se detectaron casos familiares en 116 celiacos (17,6%), sobre todo entre hermanos (ver <a href="#2a02t1">tabla 1</a>).</font></p>     <p>&nbsp;</p>     <p align="center"><a name="2a02t1"></a><img src="/img/revistas/hn/v3n2/2a02t1.jpg">     <p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La presentaci&oacute;n cl&iacute;nica predominante fue la forma cl&aacute;sica de diarreas cr&oacute;nicas con cuadro de malabsorci&oacute;n intestinal, acompa&ntilde;adas de meteorismo, crecimiento y dolor abdominal, v&oacute;mitos y p&eacute;rdida de peso (ver <a href="#2a02g2">gráfico 2</a>).</font></p>     <p>&nbsp;</p>     <p align="center"><a name="2a02g2"></a><img src="/img/revistas/hn/v3n2/2a02g2.jpg">     ]]></body>
<body><![CDATA[<p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La forma cl&aacute;sica fue m&aacute;s frecuente entre los varones (67% vs 60%) y la forma at&iacute;pica m&aacute;s frecuente entre las mujeres (32% vs 23%) (p 0,03 prueba Chi<SUP>2</SUP>).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Se consider&oacute; manifestaci&oacute;n at&iacute;pica cuando el &uacute;nico motivo de consulta era un s&iacute;ntoma no diarreico o no acompa&ntilde;aba a la diarrea. Las m&aacute;s frecuentes fueron la dermatitis herpetiforme y la anemia ferrop&eacute;nica (ver <a href="#2a02t2">tabla 2</a>)</font></p>     <p>&nbsp;</p>     <p align="center"><a name="2a02t2"></a><img src="/img/revistas/hn/v3n2/2a02t2.jpg">     <p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Las afecciones acompa&ntilde;antes m&aacute;s frecuentes fueron: tiroiditis cr&oacute;nica autoinmune: 43 casos (6,6%), enfermedades del col&aacute;geno: 7 casos (1,1%), migra&ntilde;a cl&aacute;sica: 6 casos (0,9%), s&iacute;ndrome de Down: 4 casos (0,6%), y un solo caso de diabetes tipo 1, vit&iacute;ligo, talasemia, hipereosinofilia e hipogammaglobulinemia com&uacute;n. Dos mujeres refer&iacute;an abortos frecuentes (0,4%) y una tuvo menopausia precoz.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Al conformar las cohortes, en el grupo de los ni&ntilde;os y adolescentes se incluyeron 274 casos, con edad media 7 ± 4 a&ntilde;os (rango 1-18 a&ntilde;os). En la cohorte de adultos se incluyeron 382 casos, con edad media 38 ± 13 a&ntilde;os (rango 19-83 a&ntilde;os).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Para analizar las caracter&iacute;sticas cl&iacute;nicas cl&aacute;sicas entre ambas cohortes, se incluyeron todos los s&iacute;ntomas referidos al ingreso, muchos de ellos en forma concomitante. As&iacute; destacan la p&eacute;rdida de peso, los v&oacute;mitos y la talla baja por su mayor frecuencia en la cohorte de ni&ntilde;os y adolescentes (ver <a href="#2a02t3">tabla 3</a>).</font></p>     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p align="center"><a name="2a02t3"></a><img src="/img/revistas/hn/v3n2/2a02t3.jpg">     <p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Analizando las manifestaciones cl&iacute;nicas at&iacute;picas de la EC en relaci&oacute;n a los grupos etarios, destacan la mayor frecuencia de anemia ferrop&eacute;nica, dermatitis herpetiforme, aftas bucales y tiroiditis de Hashimoto en la cohorte de adultos celiacos (ver <a href="#2a02t4">tabla 4</a>).</font></p>     <p>&nbsp;</p>     <p align="center"><a name="2a02t4"></a><img src="/img/revistas/hn/v3n2/2a02t4.jpg">     <p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Retrospectivamente se indagaba a cada sujeto sobre la edad de los primeros s&iacute;ntomas relacionados a la EC y la edad al momento del diagn&oacute;stico. As&iacute; se calcul&oacute; el tiempo medio de retraso en el diagn&oacute;stico, resultando en la cohorte de ni&ntilde;os y adolescentes una mediana de 2 a&ntilde;os (rango 1-14 a&ntilde;os). En la cohorte de adultos la mediana fue 3 a&ntilde;os (rango 1-57 a&ntilde;os). La diferencia de medianas fue significativa (p 0,0001 Test de Kruskal-Wallis para dos grupos).</font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>DISCUSION</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La incidencia en aumento en los &uacute;ltimos a&ntilde;os podr&iacute;a deberse a la mayor difusi&oacute;n de la EC en el ambiente de salud, ya que muchos m&eacute;dicos a&uacute;n creen que esta entidad afecta s&oacute;lo a los europeos y es rara en el Paraguay. Pero se sabe que la poblaci&oacute;n del pa&iacute;s es mayormente mestiza con emigrantes europeos, sobre todo del &aacute;rea del Mediterr&aacute;neo. Faltan estudios poblacionales sobre la carga gen&eacute;tica del HLA en el Paraguay. En pa&iacute;ses vecinos se ha encontrado la predominancia del gen HLA DQ2.<SUP>51</SUP></font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La preponderancia del sexo femenino (72,4%) y de casos familiares es caracter&iacute;stica de la EC y acorde a otros reportes.<SUP>2,5,9</SUP> De ah&iacute; que es recomendable que cuando se detecta un caso, todos los familiares consangu&iacute;neos deber&iacute;an testarse buscando esta afecci&oacute;n, que puede hallarse silente.<SUP>3,4</SUP></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La distribuci&oacute;n de las formas cl&iacute;nicas de EC es semejante a otras publicaciones,<SUP>22</SUP> alert&aacute;ndonos de que esta enfermedad no siempre se presenta con diarreas cr&oacute;nicas. Entre las manifestaciones at&iacute;picas llama la atenci&oacute;n la elevada frecuencia de la presentaci&oacute;n con constipaci&oacute;n.<SUP>16</SUP> Este fen&oacute;meno puede deberse al estado inflamatorio del intestino delgado que enlentece el peristaltismo normal o a un disbalance del sistema nervioso aut&oacute;nomo, con predominio del simp&aacute;tico.<SUP>52</SUP> Pero en este estudio, se asoci&oacute; significativamente al hipotiroidismo (RR 1,6 IC  95% 1,1-2,4  p=0,03), asociaci&oacute;n com&oacute;rbida que no debe olvidarse.<SUP>25</SUP></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La frecuencia de osteoporosis fue muy baja (1%), a pesar del retraso general en el diagn&oacute;stico y la gran cantidad de sujetos a&ntilde;osos, posiblemente porque la detecci&oacute;n de la osteoporosis no se realiza rutinariamente en los celiacos. Este tema debe ser investigado pr&oacute;ximamente.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Llam&oacute; la atenci&oacute;n la baja proporci&oacute;n de celiacos con diabetes tipo 1, dado que comparten la misma predisposici&oacute;n gen&eacute;tica y es una de las enfermedades autoinmunes m&aacute;s frecuentes en la EC.<SUP>29</SUP> Tal vez se deba a que los diab&eacute;ticos tipo 1 no son a&uacute;n testados rutinariamente con los marcadores serol&oacute;gicos de EC, como se recomiendan en las gu&iacute;as y consensos.<SUP>33,34</SUP></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Al comparar la cohorte de ni&ntilde;os y adolescentes vs la de adultos, la talla baja y la p&eacute;rdida de peso resultaron significativamente m&aacute;s frecuentes en la primera cohorte. Este fen&oacute;meno podr&iacute;a deberse al estrecho control de peso y talla que realizan los m&eacute;dicos Pediatras o tal vez a que llaman m&aacute;s la atenci&oacute;n los ni&ntilde;os que no crecen o suben de peso cuando se comparan con sus cong&eacute;neres de la misma edad.<SUP>16,21,50</SUP></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Contrariamente, las manifestaciones at&iacute;picas fueron m&aacute;s frecuentes en la cohorte de adultos. Se aduce que cuanto mayor es el tiempo de exposici&oacute;n al gluten, mayor es el riesgo de aparici&oacute;n de enfermedades autoinmunes.<SUP>25,27</SUP> Es por ello recomendable realizar el diagn&oacute;stico de EC, a&uacute;n de las formas silentes, en fases tempranas de la vida y evitar la aparici&oacute;n de las m&uacute;ltiples complicaciones que trae aparejada la ingesta de gluten en estos sujetos susceptibles.<SUP>41,45,46</SUP></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Un tema pendiente en este estudio es evaluar el grado de cumplimiento de la dieta sin gluten y la calidad de vida de los celiacos y sus familiares.<SUP>42-44</SUP></font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>CONCLUSIONES</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Las caracter&iacute;sticas demogr&aacute;ficas de los sujetos con EC registrados en la Fundaci&oacute;n Paraguaya de Celiacos (FUPACEL) son: predominancia en el sexo femenino (72,4%), edad media de presentaci&oacute;n a 25±18 a&ntilde;os, mediana de retraso en el diagn&oacute;stico de 6 a&ntilde;os, frecuencia de 17,6% de casos familiares.</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La presentaci&oacute;n cl&iacute;nica como s&iacute;ndrome diarreico cr&oacute;nico (forma cl&aacute;sica) en fue la m&aacute;s frecuente (62,7%), seguida de la forma at&iacute;pica (30,2%) y la silente (7,2%).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La diferencia en la presentaci&oacute;n cl&iacute;nica de la EC entre adultos y ni&ntilde;os/adolescentes fue la mayor proporci&oacute;n de v&oacute;mitos, p&eacute;rdida de peso y talla baja en la cohorte de ni&ntilde;os y adolescentes. En relaci&oacute;n a las manifestaciones at&iacute;picas, en la cohorte de adultos predominan las aftas bucales, la anemia ferrop&eacute;nica, la tiroiditis de Hashimoto y la Dermatitis herpetiforme.</font></p>     <p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>CONFLICTOS DE INTER&Eacute;S:</b> Los autores declaran no existir conflicto de inter&eacute;s.</font></p>     <p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>AGRADECIMIENTO.</b> A los miembros de la Comisi&oacute;n Directiva de FUDAPEL, por el registro de datos en 16 a&ntilde;os de esta entidad.</font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>REFERENCIAS</b></font></p>     <!-- ref --><p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">1. Cook HB, Burt MJ, Collett JA, Whitehead MR, Frampton CM, Chapman BA. Adult coeliac disease: prevalence and clinical significance.  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