<?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>1688-1249</journal-id>
<journal-title><![CDATA[Archivos de Pediatría del Uruguay]]></journal-title>
<abbrev-journal-title><![CDATA[Arch. Pediatr. Urug.]]></abbrev-journal-title>
<issn>1688-1249</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Uruguaya de Pediatría]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1688-12492012000100005</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Síndrome de Cushing secundario a interacción medicamentosa ritonavir/fluticasona]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguirre]]></surname>
<given-names><![CDATA[Mey]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez]]></surname>
<given-names><![CDATA[Stella]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quian]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[María José]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[Virginia]]></given-names>
</name>
</contrib>
</contrib-group>
<aff id="A">
<institution><![CDATA[,  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2012</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2012</year>
</pub-date>
<volume>83</volume>
<numero>1</numero>
<fpage>21</fpage>
<lpage>25</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S1688-12492012000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S1688-12492012000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S1688-12492012000100005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se presentan tres casos clínicos de niños con infección por el virus de la inmunodeficiencia humana (en tratamiento con ritonavir/lopinavir, zidovudina y lamivudina) y asma persistente y/o rinitis alérgica (en tratamiento con propionato de fluticasona inhalado o intranasal) que luego de terapia concomitante presentan, aumento de peso, cara de luna llena y estrías en muslos. En el caso 1 el diagnóstico fue clínico no lográndose la confirmación por laboratorio. En los casos 2 y 3 el cortisol sérico y ACTH fueron consistentes con supresión adrenal. En el caso 1 al suspender la fluticasona se normalizó examen físico a los 6 meses. En el caso 2 al suspender fluticasona se normalizó examen clínico a los 6 meses, no realizándose paraclínica. En el caso 3 a los 6 meses del cambio de ritonavir se evidencia retroceso de la clínica y normalización de la ACTH y cortisolemia. Se confirma así un síndrome de Cushing iatrogénico secundario a interacción medicamentosa ritonavir/fluticasona]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary We present 3 cases of children infected with human immunodeficiency virus (treated with ritonavir / lopinavir, zidovudine and lamivudine) and persistent asthma, and/or allergic rhinitis (treatment with inhaled fluticasone propionate or intranasal) that later have concomitant therapy, weight gain, moon face, and stretch marks on thighs. In case 1 the diagnosis did not achieve clinical laboratory confirmation. In cases 2 and 3, the serum cortisol and ACTH were consistent with adrenal suppression. In case 1 after discontinuation of fluticasone physical examination was normal at 6 months. In case 2 after stopping fluticasone clinical examination was normal at 6 months, no paraclinical performing. In case 3 to 6 months of ritonavir exchange of clinical regression and normalization of ACTH and cortisol levels was evident. This confirms iatrogenic Cushing's syndrome secondary to ritonavir drug interaction/fluticasone]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[SÍNDROME DE CUSHING]]></kwd>
<kwd lng="es"><![CDATA[INFECCIONES POR VIH]]></kwd>
<kwd lng="es"><![CDATA[ASMA]]></kwd>
<kwd lng="es"><![CDATA[RITONAVIR-efectos adversos]]></kwd>
<kwd lng="es"><![CDATA[CORTICOESTEROIDES- efectos adversos]]></kwd>
<kwd lng="es"><![CDATA[INTERACCIONES DE DROGAS]]></kwd>
<kwd lng="en"><![CDATA[CUSHING SYNDROME]]></kwd>
<kwd lng="en"><![CDATA[HIV INFECTIONS]]></kwd>
<kwd lng="en"><![CDATA[ASTHMA]]></kwd>
<kwd lng="en"><![CDATA[RITONAVIR-adverse effects]]></kwd>
<kwd lng="en"><![CDATA[ADRENAL CORTEX HORMONES-adverse effects]]></kwd>
<kwd lng="en"><![CDATA[DRUG INTERACTIONS]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[     <basefont size="3"> <multicol gutter="18" cols="2"></multicol>     <p align="left"><font color="#1f1a17" face="Verdana" size="2"><strong>CASOS CL&Iacute;NICOS</strong>    <br>    Arch Pediatr Urug 2012; 83(1)</font></p>        <p align="left">&nbsp;</p>        <p align="left"><b><font color="#1f1a17" face="Verdana" size="4"> S&iacute;ndrome de Cushing secundario    a interacci&oacute;n medicamentosa ritonavir/fluticasona&nbsp; </font></b></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"><a name="1-"></a> Mey Aguirre </font><font color="#1f1a17" face="Times New Roman" size="2"> <a href="#1_"> <font color="#1f1a17" face="Verdana"><sup>1</sup></font></a><font color="#1f1a17" face="Verdana" size="2">, Stella Guti&eacute;rrez</font><font color="#1f1a17" face="Verdana"><sup> </sup></font><a href="#2_"> <font color="#1f1a17" face="Verdana"><sup>2</sup></font></a><font color="#1f1a17" face="Verdana" size="2">, <a name="2-"></a>Jorge Quian</font><font color="#1f1a17" face="Verdana"><sup> <a href="#2_">2</a></sup></font><font color="#1f1a17" face="Verdana" size="2">, <a name="3-"></a>Mar&iacute;a Jos&eacute; Ram&iacute;rez </font><a href="#3_"> <font color="#1f1a17" face="Verdana"><sup>3</sup></font></a><font color="#1f1a17" face="Verdana" size="2">,<a name="4-"></a>  Virginia Gonz&aacute;lez </font><a href="#4_"> <font color="#1f1a17" face="Verdana"><sup>4</sup></font></a><font color="#1f1a17" face="Verdana" size="2">&nbsp;</font></font><font color="#1f1a17" face="Verdana" size="2"> </font></p>    <basefont size="3">     <p align="left"><font color="#1f1a17" face="Verdana" size="2"><a name="1_"></a> <a href="#1-">1</a>. Residente de Pediatr&iacute;a.    <br>   <a name="2_"></a>   <a href="#2-">2</a>. Profesor Agregado de Pediatr&iacute;a.    <br>   <a name="3_"></a><a href="#3-">   3</a>. Pediatra.   Endocrin&oacute;logo.    <br>   <a name="4_"></a>   <a href="#4-">4</a>. Asistente de Pediatr&iacute;a.    ]]></body>
<body><![CDATA[<br>      Fecha recibido: 18 de noviembre   de 2011.    <br>      Fecha aprobado: 8 de mayo de 2012.&nbsp; </font></p>    <font face="Verdana" size="2">        <br>    </font>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Resumen&nbsp; </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> <i>Se presentan tres casos cl&iacute;nicos de ni&ntilde;os con infecci&oacute;n por el virus de  la inmunodeficiencia humana (en tratamiento con ritonavir/lopinavir, zidovudina  y lamivudina) y asma persistente y/o rinitis al&eacute;rgica (en tratamiento con  propionato de fluticasona inhalado o intranasal) que luego de terapia concomitante  presentan, aumento de peso, cara de luna llena y estr&iacute;as en muslos. En  el caso 1 el diagn&oacute;stico fue cl&iacute;nico no logr&aacute;ndose la confirmaci&oacute;n por  laboratorio. En los casos 2 y 3 el cortisol s&eacute;rico y ACTH fueron consistentes  con supresi&oacute;n adrenal. En el caso 1 al suspender la fluticasona se normaliz&oacute;  examen f&iacute;sico a los 6 meses. En el caso 2 al suspender fluticasona se normaliz&oacute;  examen cl&iacute;nico a los 6 meses, no realiz&aacute;ndose paracl&iacute;nica. En el caso 3  a los 6 meses del cambio de ritonavir se evidencia retroceso de la cl&iacute;nica  y normalizaci&oacute;n de la ACTH y cortisolemia. Se confirma as&iacute; un s&iacute;ndrome  de Cushing iatrog&eacute;nico secundario a interacci&oacute;n medicamentosa ritonavir/fluticasona.&nbsp;</i> </font></p>        <p align="left"> <font color="#1f1a17" face="Verdana" size="2">Palabras clave:    <br>    &nbsp;&nbsp;&nbsp;&nbsp;S&Iacute;NDROME DE CUSHING    <br>    &nbsp;&nbsp;&nbsp;&nbsp;INFECCIONES POR VIH    <br>    &nbsp;&nbsp;&nbsp;&nbsp;ASMA    <br>    &nbsp;&nbsp;&nbsp;&nbsp;RITONAVIR-efectos  adversos    ]]></body>
<body><![CDATA[<br>    &nbsp;&nbsp;&nbsp;&nbsp;CORTICOESTEROIDES- efectos adversos    <br>    &nbsp;&nbsp;&nbsp;&nbsp;INTERACCIONES DE DROGAS&nbsp; </font></p>   <font face="Verdana" size="2">       <br>    </font>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Summary&nbsp; </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> <i>We present 3 cases of children infected with human immunodeficiency virus  (treated with ritonavir / lopinavir, zidovudine and lamivudine) and persistent  asthma, and/or allergic rhinitis (treatment with inhaled fluticasone propionate  or intranasal) that later have concomitant therapy, weight gain, moon face,  and stretch marks on thighs. In case 1 the diagnosis did not achieve clinical  laboratory confirmation. In cases 2 and 3, the serum cortisol and ACTH  were consistent with adrenal suppression. In case 1 after discontinuation  of fluticasone physical examination was normal at 6 months. In case 2 after  stopping fluticasone clinical examination was normal at 6 months, no paraclinical  performing. In case 3 to 6 months of ritonavir exchange of clinical regression  and normalization of ACTH and cortisol levels was evident. This confirms  iatrogenic Cushing's syndrome secondary to ritonavir drug interaction/fluticasone.&nbsp;</i> </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> <i>    <br>   </i> </font></p>        <p align="left"> <font color="#1f1a17" face="Verdana" size="2">Key words:    <br>    &nbsp;&nbsp;&nbsp;&nbsp;CUSHING SYNDROME    <br>    &nbsp;&nbsp;&nbsp;&nbsp;HIV INFECTIONS    ]]></body>
<body><![CDATA[<br>    &nbsp;&nbsp;&nbsp;&nbsp;ASTHMA    <br>    &nbsp;&nbsp;&nbsp;&nbsp;RITONAVIR-adverse effects    <br>    &nbsp;&nbsp;&nbsp;&nbsp;ADRENAL  CORTEX HORMONES-adverse effects    <br>    &nbsp;&nbsp;&nbsp;&nbsp;DRUG INTERACTIONS&nbsp; </font></p>   <font face="Verdana" size="2">       <br>     </font>     <multicol gutter="18" cols="2"></multicol>     <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Introducci&oacute;n&nbsp; </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> El tratamiento de la infecci&oacute;n por el virus de la inmunodeficiencia humana  (VIH) ha experimentado cambios sustanciales en los &uacute;ltimos 20 a&ntilde;os. La  implementaci&oacute;n de la terapia antirretroviral (TARV) y la profilaxis y tratamiento  de las infecciones oportunistas ha sido esencial en este grupo vulnerable  de pacientes </font><font color="#1f1a17" face="Times New Roman" size="2"> <font color="#1f1a17" face="Verdana"><sup>(<a name="1.."></a><a href="#1">1</a>,<a name="2.."></a><a href="#2">2</a>)</sup></font><font color="#1f1a17" face="Verdana" size="2">. Se logra de este modo que los ni&ntilde;os afectados mejoren  su calidad de vida disminuyendo la morbimortalidad, las hospitalizaciones  y transformando la infecci&oacute;n por el VIH en una enfermedad cr&oacute;nica </font> <font color="#1f1a17" face="Verdana"><sup>(<a name="3.."></a><a href="#3">3</a>,<a name="4.."></a><a href="#4">4</a>)</sup></font><font color="#1f1a17" face="Verdana" size="2">.&nbsp;</font></font><font color="#1f1a17" face="Verdana" size="2"> </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> El TARV desde la d&eacute;cada de los 90 incluye generalmente un inhibidor de  la proteasa (IP) </font><font color="#1f1a17" face="Times New Roman" size="2"> <font color="#1f1a17" face="Verdana"><sup>(<a name="5-7.."></a><a href="#5">5</a>-<a href="#7">7</a>)</sup></font><font color="#1f1a17" face="Verdana" size="2">. Todo este grupo farmacol&oacute;gico presenta frecuentes  efectos adversos e interacciones medicamentosas </font> <font color="#1f1a17" face="Verdana"><sup><a name="8.."></a>(<a href="#8">8</a>)</sup></font><font color="#1f1a17" face="Verdana" size="2">.&nbsp;</font></font><font color="#1f1a17" face="Verdana" size="2"> </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Desde el inicio de la utilizaci&oacute;n de los IP se describieron efectos adversos  entre los que se incluye s&iacute;ndrome de Cushing y seudo s&iacute;ndrome de Cushing.  En 1999 una correspondencia de Hillebrand y col informan lo que parece  ser la primera comunicaci&oacute;n que un IP, ritonavir utilizado como tratamiento  produjo el s&iacute;ndrome de Cushing en un paciente tratado con fluticasona </font><font color="#1f1a17" face="Times New Roman" size="2"> <font color="#1f1a17" face="Verdana"><sup>(<a name="9.."></a><a href="#9">9</a>,<a name="10.."></a><a href="#10">10</a>)</sup></font><font color="#1f1a17" face="Verdana" size="2">.&nbsp;</font></font><font color="#1f1a17" face="Verdana" size="2"> </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Ritonavir es un IP que ha sufrido modificaciones en su utilizaci&oacute;n. En  una primera etapa se utiliz&oacute; como antirretroviral formando parte del triple  plan; en los &uacute;ltimos a&ntilde;os se utiliza como &ldquo;booster&rdquo; asociado a otro IP  pero en dosis bajas con lo que potencia la acci&oacute;n del otro IP. Ritonavir  inhibe en forma potente el sistema enzim&aacute;tico citocromo P450 por uni&oacute;n  competitiva reversible a la isoenzima CYP3A4 </font><font color="#1f1a17" face="Times New Roman" size="2"> <font color="#1f1a17" face="Verdana"><sup>(<a name="11.."></a><a href="#11">11</a>)</sup></font><font color="#1f1a17" face="Verdana" size="2">. Esta potente inhibici&oacute;n  enzim&aacute;tica permite alcanzar mayores concentraciones de otros IP por lo  que se puede reducir el n&uacute;mero de comprimidos al d&iacute;a lo que mejora la adherencia  y previene fallos de tratamiento por resistencia </font> <font color="#1f1a17" face="Verdana"><sup>(<a name="12.."></a><a href="#12">12</a>,<a name="13.."></a><a href="#13">13</a>)</sup></font><font color="#1f1a17" face="Verdana" size="2"> Los efectos adversos  de ritonavir son varios entre los que se menciona el s&iacute;ndrome de lipodistrofia  que puede confundir cl&iacute;nicamente con el s&iacute;ndrome de Cushing </font> <font color="#1f1a17" face="Verdana"><sup>(<a name="14.."></a><a href="#14">1</a></sup></font><a href="#14"><font color="#1f1a17" face="Verdana"><sup>4</sup></font></a><font color="#1f1a17" face="Verdana"><sup>,<a name="15.."></a>15)</sup></font><font color="#1f1a17" face="Verdana" size="2">.&nbsp;</font></font><font color="#1f1a17" face="Verdana" size="2"> </font></p>        ]]></body>
<body><![CDATA[<p align="left"><font color="#1f1a17" face="Verdana" size="2"> Fluticasona es un glucocorticoide inhalatorio o intranasal utilizado en  la prevenci&oacute;n de las exacerbaciones del asma persistente y de la rinitis  al&eacute;rgica. Habitualmente tiene efectos sist&eacute;micos m&iacute;nimos a las dosis recomendadas  (100-250 &micro;g d&iacute;a).&nbsp; </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Es metabolizada por el mismo sistema enzim&aacute;tico mencionado anteriormente  por lo que la coadministraci&oacute;n con ritonavir resulta en un incremento de  las concentraciones sist&eacute;micas de fluticasona pudiendo causar supresi&oacute;n  del eje hipot&aacute;lamo-hipofiso-adrenal y s&iacute;ndrome de Cushing. Este s&iacute;ndrome  ha sido reportado en pacientes que reciben esta combinaci&oacute;n medicamentosa  frecuentemente en adultos y menos en pediatr&iacute;a </font><font color="#1f1a17" face="Times New Roman" size="2"> <font color="#1f1a17" face="Verdana"><sup>(<a name="16.."></a><a href="#16">16</a>,<a name="17.."></a><a href="#17">17</a>)</sup></font><font color="#1f1a17" face="Verdana" size="2">.&nbsp;</font></font><font color="#1f1a17" face="Verdana" size="2"> </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> El objetivo de la presente comunicaci&oacute;n es describir tres casos cl&iacute;nicos  de Cushing ex&oacute;geno, secundario a la interacci&oacute;n medicamentosa entre ritonavir  y fluticasona y llamar la atenci&oacute;n de quienes utilizan estos medicamentos  sobre el riesgo de aparici&oacute;n de esta interacci&oacute;n medicamentosa.&nbsp; </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Casos cl&iacute;nicos&nbsp; </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> <b>Caso 1. </b>Ni&ntilde;o de 7 a&ntilde;os, infectado por transmisi&oacute;n vertical. Buen crecimiento  y desarrollo, bien inmunizado.&nbsp; </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Tratado con zidovudina (AZT), lamivudina (3TC) y nelfinavir desde los 3  meses de vida. A los 7 a&ntilde;os de edad (a&ntilde;o 2008) se cambi&oacute; nelfinavir por  lopinavir-ritonavir. Seis meses despu&eacute;s, en consulta con neumolog&iacute;a pedi&aacute;trica,  se agreg&oacute; fluticasona 250 &micro;g cada 12 horas por asma persistente. Dos meses  luego de esta indicaci&oacute;n, aumento de peso, giba dorsal, estr&iacute;as en muslos  con escaso desarrollo muscular gl&uacute;teo. Con planteo cl&iacute;nico de s&iacute;ndrome  de Cushing secundario a interacci&oacute;n medicamentosa se suspendi&oacute; fluticasona  con retroceso de los signos cl&iacute;nicos, alcanzando un examen f&iacute;sico normal  a los 6 meses. No se realizaron dosificaciones sangu&iacute;neas.&nbsp; </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Se suspendi&oacute; el tratamiento preventivo del asma quedando s&oacute;lo con tratamiento  de las crisis.&nbsp; </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> <b>Caso 2.</b> Ni&ntilde;o de 7 a&ntilde;os infectado por transmisi&oacute;n vertical. Talla baja y  retraso del desarrollo; bien inmunizado. En tratamiento con AZT, 3TC y  nelfinavir desde los 16 meses de vida. A los 5 a&ntilde;os de edad se cambi&oacute; el  IP por lopinavir/ritonavir. En mayo 2010, a los 7 a&ntilde;os de edad, dada la  persistencia de obstrucci&oacute;n nasal cr&oacute;nica (adenoidismo) y en interconsulta  con otorrinonaring&oacute;logo, se inici&oacute; tratamiento con fluticasona intranasal  100 &micro;g cada 12 horas. Dos meses despu&eacute;s, aumento del apetito y de peso.  En el examen f&iacute;sico cara de luna llena, hipertricosis, obesidad central  y estr&iacute;as rojas en muslos. Se realiz&oacute; diagn&oacute;stico cl&iacute;nico de s&iacute;ndrome de  Cushing secundario a interacci&oacute;n fluticasona/ritonavir.&nbsp; </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Las determinaciones sangu&iacute;neas de ACTH y cortisol fueron indetectables.&nbsp; </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Se suspendi&oacute; fluticasona y se inici&oacute; descenso progresivo con hidrocortisona  10 mg/d&iacute;a con buena evoluci&oacute;n. Se reemplaz&oacute; la fluticasona por budesonida.&nbsp; </font></p>        ]]></body>
<body><![CDATA[<p align="left"><font color="#1f1a17" face="Verdana" size="2"> <b>Caso 3.</b> Adolescente de 14 a&ntilde;os de sexo femenino con antecedentes personales  de neumon&iacute;as reiteradas y asma persistente moderada tratada con fluticasona  250 &micro;g cada 12 horas desde enero de 2008 con buena respuesta terap&eacute;utica.  Buen crecimiento y desarrollo, inmunizaciones vigentes. En febrero 2009,  candidiasis orofar&iacute;ngea severa que condujo al diagn&oacute;stico de infecci&oacute;n  por VIH de mecanismo de transmisi&oacute;n desconocida, comenzando tratamiento  con AZT, 3TC y lopinavir/ritonavir. Al mes de iniciada la TARV present&oacute;  en forma progresiva cambio de car&aacute;cter con irritabilidad, aumento del apetito  y de peso, cara de luna llena, brillante, estr&iacute;as en cara interna de ambos  muslos. Carga viral indetectable. El crecimiento se detuvo.&nbsp; </font></p>     <multicol gutter="18" cols="2"></multicol>     <p align="left"><font color="#1f1a17" face="Verdana" size="2"> La cara de luna llena y las estr&iacute;as se muestran en las figuras <a href="#fig1">1</a> y <a href="#fig2">2</a>; el  incremento de peso y detenci&oacute;n de la talla en las figuras <a href="#fig3">3</a> y <a href="#fig4">4</a>.&nbsp; </font></p>        <p align="left"><font face="Verdana"><a name="fig1"><font size="2"></font></a> <font size="2"><img style="width: 318px; height: 279px;" alt="" src="/img/revistas/adp/v83n1/1a05f1.JPG">    <br>   </font></font><font size="2">   </p>        <p><font face="Verdana"><a name="fig2"></a><img style="width: 324px; height: 250px;" alt="" src="/img/revistas/adp/v83n1/1a05f2.JPG"></font></p>         <p align="left"><font face="Verdana"><a name="fig3"></a><img style="width: 346px; height: 292px;" alt="" src="/img/revistas/adp/v83n1/1a05f3.JPG">    <br>   </font>   </p>   </font><font size="2" face="Verdana">   <a name="fig4"></a><img style="width: 354px; height: 302px;" alt="" src="/img/revistas/adp/v83n1/1a05f4.JPG"> </font>       <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Se realiz&oacute; diagn&oacute;stico de s&iacute;ndrome de Cushing secundario a interacci&oacute;n  fluticasona-ritonavir. ACTH y cortisol fueron indetectables en sangre.&nbsp; </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Dada la gravedad de su asma, continu&oacute; con fluticasona disminuyendo la dosis  a 250 &micro;g/d&iacute;a y se suspendi&oacute; lopinavir/ritonavir sustituy&eacute;ndolo por efavirenz.  Se inici&oacute; hidrocortisona 15 mg/d&iacute;a con descenso progresivo.&nbsp; </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> A los 6 meses del cambio de medicaci&oacute;n ARV, present&oacute; desaparici&oacute;n de los  signos cl&iacute;nicos con valores de cortisol y ACTH normales.&nbsp; </font></p>        ]]></body>
<body><![CDATA[<p align="left"><font color="#1f1a17" face="Verdana" size="2"> Discusi&oacute;n&nbsp; </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Los ARV utilizados en el TARV si bien tienen ya varios a&ntilde;os de indicaci&oacute;n  en ni&ntilde;os y adolescentes, se usan en combinaciones variables entre ellos  y con medicamentos necesarios para otras patolog&iacute;as. Esto ha hecho dificultoso  diagnosticar r&aacute;pidamente los efectos adversos y las interacciones medicamentosas.&nbsp; </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Uno de los primeros planes de TARV utilizados por los autores fue la asociaci&oacute;n  de AZT, 3TC y primero ritonavir y posteriormente nelfinavir como IP. En  el a&ntilde;o 2007 hubo una recomendaci&oacute;n general de no utilizar mas nelfinavir  por sus posibles efectos adversos graves </font><font color="#1f1a17" face="Times New Roman" size="2"> <font color="#1f1a17" face="Verdana"><sup>(<a href="#8">8</a>)</sup></font><font color="#1f1a17" face="Verdana" size="2"> y se decidi&oacute; sustituirlo por  la combinaci&oacute;n lopinavir/ritonavir que anteriormente no se dispon&iacute;a. En  esta combinaci&oacute;n el ritonavir se prescribe a dosis menores que cuando se  utilizaba aislado </font><font color="#1f1a17" face="Verdana"><sup>(<a name="18.."></a><a href="#18">1</a></sup></font><a href="#18"><font color="#1f1a17" face="Verdana"><sup>8</sup></font></a><font color="#1f1a17" face="Verdana"><sup>,<a name="19.."></a>19)</sup></font><font color="#1f1a17" face="Verdana" size="2">.&nbsp;</font></font><font color="#1f1a17" face="Verdana" size="2"> </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Los IP as&iacute; como la mayor&iacute;a de los ARV solos o en combinaci&oacute;n pueden provocar  el s&iacute;ndrome de lipodistrofia, que cl&iacute;nicamente pueden confundirse con el  s&iacute;ndrome de Cushing y que llevan a retardar el diagn&oacute;stico. Hay varias  publicaciones al respecto y sobre todo en los pacientes pedi&aacute;tricos, al  iniciar el TARV se observa que el paciente aumenta de peso, tiene m&aacute;s apetito,  aparecen dep&oacute;sitos de grasa donde previamente exist&iacute;a desnutrici&oacute;n, elementos  que pueden confundir el diagn&oacute;stico </font><font color="#1f1a17" face="Times New Roman" size="2"> <font color="#1f1a17" face="Verdana"><sup>(<a name="20.."></a><a href="#20">20</a>)</sup></font><font color="#1f1a17" face="Verdana" size="2">.&nbsp;</font></font><font color="#1f1a17" face="Verdana" size="2"> </font></p>     <multicol gutter="18" cols="2"></multicol>     <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Reci&eacute;n en el a&ntilde;o 2010 aparecieron las recomendaciones de no combinar ritonavir  con fluticasona </font><font color="#1f1a17" face="Times New Roman" size="2"> <font color="#1f1a17" face="Verdana"><sup>(<a name="21.."></a></sup></font><a href="#21"><font color="#1f1a17" face="Verdana"><sup>21</sup></font></a><font color="#1f1a17" face="Verdana"><sup>)</sup></font><font color="#1f1a17" face="Verdana" size="2">. Los pacientes presentados todos fueron tratados y  diagnosticados antes de esa fecha. Pero no es s&oacute;lo la fluticasona la que  puede provocar este s&iacute;ndrome en conjunci&oacute;n con ritonavir. Hay publicaciones  que involucran a budesonida y triamcinolona </font> <font color="#1f1a17" face="Verdana"><sup>(<a name="22.."></a><a href="#22">2</a></sup></font><a href="#22"><font color="#1f1a17" face="Verdana"><sup>2</sup></font></a><font color="#1f1a17" face="Verdana"><sup>,<a name="23.."></a>23)</sup></font><font color="#1f1a17" face="Verdana" size="2">.&nbsp;</font></font><font color="#1f1a17" face="Verdana" size="2"> </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Por otra parte son frecuentes en los pacientes infectados con VIH la hiperreactividad  bronquial y las enfermedades obstructivas de la v&iacute;a a&eacute;rea </font><font color="#1f1a17" face="Times New Roman" size="2"> <font color="#1f1a17" face="Verdana"><sup>(<a name="24.."></a>24)</sup></font><font color="#1f1a17" face="Verdana" size="2">.&nbsp;</font></font><font color="#1f1a17" face="Verdana" size="2"> </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Son pocos los profesionales pediatras que utilizan ARV; pero son varios  los que ven estos pacientes en sus consultas y los especialistas a quienes  son derivados para optimizar ciertos tratamientos. Es con ese objetivo  que se presentan estos tres casos de ni&ntilde;os infectados con el VIH que tuvieron  enfermedad respiratoria y requirieron consultas especializadas.&nbsp; </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Son dos las posibilidades que se presentan para evitar esta asociaci&oacute;n.  En cuanto a los ARV es posible modificar el IP o por otro IP (aunque muchos  tienen como booster a ritonavir) o a ARV de otra clase. Existen limitaciones  terap&eacute;uticas, porque si bien en el mercado existen m&aacute;s de 20 ARV, muchos  de ellos no son de uso pedi&aacute;trico o no tienen presentaciones adecuadas  y por tanto es necesario ser muy cuidadoso en la indicaci&oacute;n.&nbsp; </font></p>        <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Referencias bibliogr&aacute;ficas&nbsp; </font></p>        <!-- ref --><p align="left"><font color="#1f1a17" face="Verdana" size="2"><a name="1"></a> <a href="#1..">1</a>.&nbsp;&nbsp;&nbsp;&nbsp;<b>Sterne J, Hern&aacute;n M, Ledergerber B, Tilling K, Weber R, Sendi P et al. </b>Long term effectiveness of potent antiretroviral therapy in preventing  AIDS and death: a prospective cohort study.<b> </b>Lancet 2005; 366: 378-84.    <b>&nbsp;</b> </font></p>        <!-- ref --><p align="left"><font color="#1f1a17" face="Verdana" size="2"><a name="2"></a> <a href="#2..">2</a>.&nbsp;&nbsp;&nbsp;&nbsp;<b>Kaplan J, Hanson D, Dworkin M, Frederick T, Bertolli J, Lindegren M et  al. </b>Epidemiology of the HIV associated opportunistic infections in the  United States in the era of highly active antiretroviral therapy. Clin  Infect Dis&nbsp;&nbsp;&nbsp;&nbsp; 2000; 30 (Suppl 1): S5-S14.    &nbsp; </font></p>        <!-- ref --><p align="left"><font color="#1f1a17" face="Verdana" size="2"><a name="3"></a> <a href="#3..">3</a>.&nbsp;&nbsp;&nbsp;&nbsp;<b>Quian J, Gutierrez S, Pujadas M, Gonzalez V, Mas M, Parodi A et al. </b>Hospitalizaciones  de ni&ntilde;os infectados por el VIH.<b> </b>Arch Pediatr Urug 2008; 79(2): 105-12.    <b>&nbsp;</b> </font></p>        <!-- ref --><p align="left"><font color="#1f1a17" face="Verdana" size="2"><a name="4"></a> <a href="#4..">4</a>.&nbsp;&nbsp;&nbsp;&nbsp;<b>Battegay M, N&uuml;esch R, Hirschel B, Kaufmann G. </b>Immunological recovery  and antiretroviral therapy in HIV-1 infection.<b> </b>Lancet Infect Dis 2006;  6: 280-7.    <b>&nbsp;</b> </font></p>        <!-- ref --><p align="left"><font color="#1f1a17" face="Verdana" size="2"><a name="5"></a> <a href="#5-7..">5</a>.&nbsp;&nbsp;&nbsp;&nbsp;<b>Sanchez J, Ramos J, Fernandez S, Gonzalez M, Rojo P, Ferrando P et al. </b>Impact of highly active antiretroviral therapy on the morbidity and mortality  in<b> </b>Spanish HIV-infected children.<b> </b>Pediatr Infect Dis J; 2003; 22: 863-7.    <b>&nbsp;</b> </font></p>        <!-- ref --><p align="left"><font color="#1f1a17" face="Verdana" size="2"><a name="6"></a> <a href="#5-7..">6</a>.&nbsp;&nbsp;&nbsp;&nbsp;<b>Giaquinto C, Morelli E, Fregonese F, Rampon O, Penazzato M, de Rossi  A. </b>Current and future antiretroviral treatment options in Paediatric HIV  infection.<b> </b>Clin Drug Invest 2008; 28 (6): 375-97.    <b>&nbsp;</b> </font></p>        <!-- ref --><p align="left"><font color="#1f1a17" face="Verdana" size="2"><a name="7"></a> <a href="#5-7..">7</a>.&nbsp;&nbsp;&nbsp;&nbsp;<b>Gilkman D, Wlsh L, Valkenburg J, Mangat D, Marcinak J. </b>Hospital-based  directly observed therapy for HIV-infected children and adolescents<b> t</b>o  assess adherence to antiretroviral medications.<b> </b>Pediatrics 2007; 119(5):  e1142-e1148.    <b>&nbsp;</b> </font></p>        <!-- ref --><p align="left"><font color="#1f1a17" face="Verdana" size="2"><a name="8"></a> <a href="#8..">8</a>.&nbsp;&nbsp;&nbsp;&nbsp;<b>Working Group on Antiretroviral Therapy and Medical Management of HIV-Infected  Children. </b>Guidelines for the use of antiretroviral agents in pediatric  HIV infection. 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