<?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>0121-246X</journal-id>
<journal-title><![CDATA[Revista Facultad de Odontología Universidad de Antioquia]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Fac Odontol Univ Antioq]]></abbrev-journal-title>
<issn>0121-246X</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Antioquia ]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0121-246X2010000100010</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Neurofibromatosis: reporte de un caso]]></article-title>
<article-title xml:lang="en"><![CDATA[Neurofibromatosis: a case report]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Duque Serna]]></surname>
<given-names><![CDATA[Francisco Levi]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez Usuga]]></surname>
<given-names><![CDATA[Omar Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de Antioquia Facultad de Odontología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad de Antioquia Facultad de Odontología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>01</month>
<year>2010</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>01</month>
<year>2010</year>
</pub-date>
<volume>21</volume>
<numero>2</numero>
<fpage>218</fpage>
<lpage>225</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0121-246X2010000100010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0121-246X2010000100010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0121-246X2010000100010&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[La neurofibromatosis tipo I (NF1) es una alteración autosómica dominante que se manifiesta con múltiples lesiones cutáneas, llamadas neurofibromas. Las manifestaciones orales han sido reportadas en porcentajes bajos, siendo la lengua el lugar afectado con mayor frecuencia. Presentamos el caso de una paciente afectada por neurofibromas que invaden cavidad oral y lengua que fue tratada en el servicio de Cirugía Oral y Maxilofacial del Hospital Universitario San Vicente de Paúl.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Type I Neurofibromatosis (NF1) is an autosomal dominant disease that presents with multiple cutaneous lesions, named neurofibromas. Oral manifestations have been reported in low percentages, but the tongue has been the most common site. This is a report of a case of a young girl with neurofibroma which invaded the oral cavity and tongue and was treated at the Oral and Maxillofacial Surgery Service of Hospital Universitario San Vicente de Paúl.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[neurofibroma]]></kwd>
<kwd lng="es"><![CDATA[neurofibromatosis]]></kwd>
<kwd lng="es"><![CDATA[enfermedad de von Recklinghausen]]></kwd>
<kwd lng="en"><![CDATA[neurofibroma]]></kwd>
<kwd lng="en"><![CDATA[neurofibromatosis]]></kwd>
<kwd lng="en"><![CDATA[von Recklinghausen disease]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[   <font size="2" face="Verdana">      <p align="right"><b>REPORTE DE CASOS</b></p>          <p>&nbsp;</p>       <p align="center"><font size="4" face="Verdana"><b>Neurofibromatosis: reporte de un caso</b></font></p>          <p>&nbsp;</p>           <p align="center"><font size="3" face="Verdana"><b>Neurofibromatosis: a case report</b></font></p>         <p>&nbsp;</p>          <p>&nbsp;</p>         <p><b>Francisco Levi Duque Serna<sup>1</sup>; Omar Alberto Ram&iacute;rez Usuga<sup>2</sup></b></p>      <p><sup>1</sup> Odont&oacute;logo. Especialista en Estomatolog&iacute;a. Cirug&iacute;a Oral y Maxilofacial. Alta gerencia. Profesor titular Facultad de Odontolog&iacute;a, Universidad de Antioquia. Medell&iacute;n, Colombia. Direcci&oacute;n electr&oacute;nica: <a href="mailto:flds@une.net.co">flds@une.net.co</a>    ]]></body>
<body><![CDATA[<br>  <sup>2</sup> Odont&oacute;logo. Estudiante del posgrado de Cirug&iacute;a Oral y Maxilofacial de la Facultad de Odontolog&iacute;a, Universidad de Antioquia, Medell&iacute;n, Colombia. Direcci&oacute;n electr&oacute;nica: <a href="mailto:omarar@hotmail.com">omarar@hotmail.com</a></a></p>       <p>&nbsp;</p>     <p>&nbsp;</p> <hr noshade>      <p><b>RESUMEN</b></p>           <p>La neurofibromatosis tipo I (NF1) es una alteraci&oacute;n autos&oacute;mica dominante que se manifiesta con m&uacute;ltiples lesiones cut&aacute;neas, llamadas neurofibromas. Las manifestaciones orales han sido reportadas en porcentajes bajos, siendo la lengua el lugar afectado con mayor frecuencia. Presentamos el caso de una paciente afectada por neurofibromas que invaden cavidad oral y lengua que fue tratada en el servicio de Cirug&iacute;a Oral y Maxilofacial del Hospital Universitario San Vicente de Pa&uacute;l.</p>          <p><b>Palabras clave:</b> neurofibroma, neurofibromatosis, enfermedad de von Recklinghausen.</p>   <hr noshade>           <p><b>ABSTRACT</b></p>           <p>Type I Neurofibromatosis (NF1) is an autosomal dominant disease that presents with multiple cutaneous lesions, named neurofibromas. Oral manifestations have been reported in low percentages, but the tongue has been the most common site. This is a report of a case of a young girl with neurofibroma which invaded the oral cavity and tongue and was treated at the Oral and Maxillofacial Surgery Service of Hospital Universitario San Vicente de Pa&uacute;l.</p>      <p><b>Key words:</b> neurofibroma, neurofibromatosis, von Recklinghausen disease.</p>  <hr noshade>     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p>      <p><font size="3" face="Verdana"><b>NEUROFIBROMATOSIS</b></font></p>      <p>La neurofibromatosis tipo 1(NF1) descrita por primera vez por von Recklinghausen en 1884 es una enfermedad de transmisi&oacute;n gen&eacute;tica autos&oacute;mica dominante causada por un espectro de mutaciones al gen NF-1. Su manifestaci&oacute;n cl&iacute;nica m&aacute;s importante es la aparici&oacute;n de lesiones cut&aacute;neas que pueden estar en cantidades de 500 a 1.000, principalmente en torax.<sup>1</sup></p>      <p>Estas lesiones est&aacute;n formadas por la combinaci&oacute;n de c&eacute;lulas de Schwann, fibroblastos, mastocitos y c&eacute;lulas perineurales. Debido a su crecimiento constante pueden comprometer estructuras &oacute;seas, v&iacute;sceras, arterias y venas.<sup>2</sup> Existe una variante clasificada como neurofibromatosis tipo 2(NF2). La NF1 se presenta aproximadamente en 1 de cada 3.000 nacimientos,<sup>3</sup>  mientras que NF2 solo se ha reportado en cerca de 1 en cada 50.000 nacimientos.<sup>4</sup> La NF1 se caracteriza por la presencia de los siguientes signos: seis o m&aacute;s m&aacute;culas de color &ldquo;caf&eacute; en leche&rdquo; de 0,5 cm de di&aacute;metro, m&uacute;ltiples neurofibromas, m&aacute;culas caf&eacute; en leche bajo las axilas y zonas de pliegues de la piel tales como la ingle y las axilas, presencia de n&oacute;dulos de Lisch (hamartomas en el iris ocular).<sup>5-8</sup> La NF2 se conoce como neurofibromatosis ac&uacute;stica bilateral, se caracteriza por la presencia de m&uacute;ltiples tumores y lesiones en cerebro y la m&eacute;dula espinal.<sup>4</sup> El primer s&iacute;ntoma de la enfermedad suele ser el crecimiento de tumores en los nervios auditivos que tienen como consecuencia la p&eacute;rdida de audici&oacute;n,<sup>9</sup> con frecuencia, esto no es evidente hasta finales de la adolescencia o principios de la adultez.<sup>1</sup></p>      <p>Las manifestaciones orales de la NF1 se presentan entre el 5 y 7%. Se han reportado tumores que comprometen todos los tejidos, tanto duros como blandos, pero la lengua es el lugar m&aacute;s com&uacute;n de aparici&oacute;n de los neurofi bromas.<sup>10</sup></p>      <p>Reportamos el caso de una paciente con diagn&oacute;stico confirmado de NF1 que present&oacute; compromiso funcional y est&eacute;tico a partir de neurofi bromas que iniciaron en la regi&oacute;n cervical izquierda y que infi ltraron los tejidos orales, principalmente la lengua.</p>      <p>&nbsp;</p>      <p><font size="3" face="Verdana"><b>CASO CL&Iacute;NICO</b></font></p>      <p>Paciente de sexo femenino de doce a&ntilde;os, procedente de Urrao (Antioquia). El motivo de consulta principal era cefalea constante, acompa&ntilde;ada de disfagia, mareos y con dificultad respiratoria ocasional. La paciente presentaba como antecedente quir&uacute;rgico la resecci&oacute;n parcial de una masa en la regi&oacute;n c&eacute;rvico-occipital derecha a los tres a&ntilde;os de edad, con diagn&oacute;stico de neurofibromatosis. No asisti&oacute; a los controles programados en los &uacute;ltimos ocho a&ntilde;os. Entre los antecedentes familiares de la paciente se encuentran: abuela materna con tumor en sistema nervioso central (SNC) no especificado, madre con m&uacute;ltiples neurofibromas en piel y un tumor en tejidos blandos de regi&oacute;n sacra no especificado.</p>      <p>A la inspecci&oacute;n se encontr&oacute; una paciente consciente, orientada con asimetr&iacute;a marcada caracterizada por aumento de tama&ntilde;o en regi&oacute;n c&eacute;rvico-occipital derecha, donde se observaron dos cicatrices de 85 y 25 mm, asociadas a la primera resecci&oacute;n, a los tres a&ntilde;os de edad. M&uacute;ltiples manchas color &ldquo;caf&eacute; en leche&rdquo; en la regi&oacute;n geniana derecha, cuello, espalda, pies y axila derecha. Presenta labios incompetentes, con lengua protruida en reposo, con amplitud de 54 mm, y que se palpa indurada. Asim&eacute;trica en toda su extensi&oacute;n, con mayor volumen, desde la ra&iacute;z, en el lado derecho. Presenta mordida abierta dental de 9 mm y m&uacute;ltiples diastemas en ambos maxilares. Relaci&oacute;n dental de clase III esquel&eacute;tica y patr&oacute;n de prognatismo mandibular marcado (<a href="#f1">figuras 1</a>, <a href="#f2">2</a> y <a href="#f3">3</a>).</p>      ]]></body>
<body><![CDATA[<p align="center"><a name="f1"><img src=img/revistas/rfoua/v21n2/v21n2a10f1.jpg></a> </p>      <p align="center"><a name="f2"><img src=img/revistas/rfoua/v21n2/v21n2a10f2.jpg></a> </p>      <p align="center"><a name="f3"><img src=img/revistas/rfoua/v21n2/v21n2a10f3.jpg></a> </p>      <p>En la tomograf&iacute;a computarizada (TC) contrastada de cabeza y cuello se observ&oacute; asimetr&iacute;a de los tejidos blandos del cuello del lado derecho y un franco engrosamiento de los tejidos prevertebrales desde la regi&oacute;n de nasofaringe, de aspecto hipodenso que empuja la mucosa en sentido anterior. Adem&aacute;s, se observ&oacute; desplazamiento completo de la v&iacute;a a&eacute;rea hacia el lado izquierdo y del espacio vascular hacia el aspecto lateral, disminuyendo el tama&ntilde;o de la vena yugular, hasta nivel de C6 aproximadamente. En el piso de boca y lengua se identific&oacute; una zona heterog&eacute;nea de bajo coeficiente de atenuaci&oacute;n en la regi&oacute;n de la hipofaringe y a la altura del hioides. La lesi&oacute;n tiene densidad negativa sugestiva de componente graso y tambi&eacute;n genera desplazamiento de las estructuras vasculares. Adicionalmente, se detectaron adenopat&iacute;as en las cadenas cervicales en forma bilateral, con n&oacute;dulos que superan los 10 mm. Finalmente, asimetr&iacute;a en la posici&oacute;n de las gl&aacute;ndulas salivales submandibulares, presentando la del lado derecho desplazamiento caudolateral asociado a la lesi&oacute;n hipodensa del piso de la lengua (<a href="#f4">figura 4</a>).</p>      <p align="center"><a name="f4"><img src=img/revistas/rfoua/v21n2/v21n2a10f4.jpg></a> </p>      <p>En biopsia de la lesi&oacute;n, el estudio histopatol&oacute;gico reporta: &ldquo;proliferaci&oacute;n de forma desorganizada e irregular de unos haces de aspecto neuronal, c&eacute;lulas ahusadas, uniformes, sin atipias, separadas del tejido conectivo adyacente por bandas de tejido fibrocol&aacute;geno&rdquo;, con diagn&oacute;stico de neurofi broma.</p>      <p>El servicio de oftalmolog&iacute;a la evalu&oacute;, confi rm&oacute; la presencia de n&oacute;dulos de Lish en ambos ojos, sin deterioro de la agudeza visual.</p>      <p>De acuerdo con estos hallazgos y con la suma de las caracter&iacute;sticas cl&iacute;nicas se llega a un diagn&oacute;stico de neurofi bromatosis tipo I. La paciente fue hospitalizada para controlar estado neurol&oacute;gico y evaluar compromiso de la v&iacute;a a&eacute;rea, fue tratada en conjunto por el Servicio de Cirug&iacute;a Maxilofacial y Otorrinolaringolog&iacute;a. Posteriormente se le realiz&oacute; cirug&iacute;a para la resecci&oacute;n parcial de la masa en regi&oacute;n cervical y glosectom&iacute;a parcial. La paciente ha asistido a los controles cuatro meses despu&eacute;s y se encuentra estable, con mejor&iacute;a de los s&iacute;ntomas generales y muestra cicatrizaci&oacute;n adecuada en la regi&oacute;n quir&uacute;rgica de la lengua (<a href="#f5">figuras 5</a> y <a href="#f6">6</a>).</p>      <p align="center"><a name="f5"><img src=img/revistas/rfoua/v21n2/v21n2a10f5.jpg></a> </p>      <p align="center"><a name="f6"><img src=img/revistas/rfoua/v21n2/v21n2a10f6.jpg></a> </p>      ]]></body>
<body><![CDATA[<p>&nbsp;</p>      <p><font size="3" face="Verdana"><b>DISCUSI&Oacute;N</b></font></p>      <p>La neurofibromatosis tipo I o neurofi bromatosis de von Recklinghausen, llamada de esta manera por el pat&oacute;logo alem&aacute;n que la describi&oacute; en 1884, es un desorden gen&eacute;tico con caracter&iacute;sticas autos&oacute;micas dominantes. Tiene una incidencia de 1 de cada 3.000 nacimientos alrededor del mundo,<sup>2, 3, 11, 12</sup> lo cual la hace una de las anomal&iacute;as cong&eacute;nitas m&aacute;s comunes. Este desorden tiene una penetrancia de casi el 100% pero tiene una expresi&oacute;n variable,<sup>13</sup> por lo que se pueden presentar grandes variaciones en la forma de presentaci&oacute;n incluso en una misma familia.<sup>14, 15</sup> 50% de los casos se dan de manera espontanea, es decir, a partir de mutaciones directas de c&eacute;lulas germinales.<sup>10</sup></p>      <p>El diagn&oacute;stico de NF1 se basa en criterios cl&iacute;nicos establecidos por el Instituto de Salud Nacional de Estados Unidos en 1988.<sup>7, 8, 11</sup> T&iacute;picamente los individuos con NF1 presentan anomal&iacute;as en la pigmentaci&oacute;n de la piel desde etapas tempranas de la vida, entre estas est&aacute;n las manchas &ldquo;caf&eacute; en leche&rdquo;, m&aacute;culas en pliegues cut&aacute;neos y hamartomas del iris (tambi&eacute;n llamados n&oacute;dulos de Lisch).<sup>5, 6</sup> Las manchas &ldquo;caf&eacute; en leche&rdquo; son el primer signo de NF1, ocurren en 99% de los pacientes menores de un a&ntilde;o.<sup>8</sup> Las m&aacute;culas en los pliegues cut&aacute;neos son el signos m&aacute;s espec&iacute;fico de NF1, son consideradas casi patognom&oacute;nicas, y se dan entre los tres y los cinco a&ntilde;os de edad. Su causa es desconocida.<sup>7, 16</sup></p>      <p>Los ni&ntilde;os con NF1 pueden presentar, antes de los seis a&ntilde;os, tumores gliales de bajo grado que comprometen la v&iacute;a &oacute;ptica, pudiendo ser gliomas o astrocitomas.<sup>13</sup> Aunque estos normalmente no progresan, aquellos que lo hacen pueden resultar en p&eacute;rdida de la visi&oacute;n, disfunci&oacute;n hipotal&aacute;mica y otros s&iacute;ntomas de disfunci&oacute;n neurol&oacute;gica.<sup>17</sup></p>      <p>Las lesiones por NF1 son generalmente tumores que pueden encontrarse en cuatro formas diferentes: cut&aacute;neas, subcut&aacute;neas, plexiformes difusa y plexiforme nodular.<sup>18, 19</sup></p>      <p>Las lesiones cut&aacute;neas por NF1 aparecen com&uacute;nmente antes o durante la adolescencia y aumentan en cantidad y tama&ntilde;o con la edad. Pueden variar en cantidad desde unas pocas hasta miles, con la mayor densidad de estas concentrada en el tronco. El prurito local puede estar asociado con crecimiento acelerado de los tumores y con estr&eacute;s emocional, lo cual puede ser el motivo inicial de consulta de los pacientes.<sup>1, 19</sup></p>      <p>Los neurofi bromas subcut&aacute;neos son similares a las presentaciones cut&aacute;neas y usualmente aparecen al inicio de la adolescencia o en la adultez temprana.<sup>19, 20</sup> Se presentan como n&oacute;dulos firmes, deprimibles, a lo largo del trayecto de nervios perif&eacute;ricos. Tanto las formas cut&aacute;neas como subcut&aacute;neas son benignas y no tienen riesgo de transformaci&oacute;n maligna.<sup>1, 21</sup></p>      <p>Los neurofibromas plexiformes nodulares o difusos se vuelven sintom&aacute;ticos por su gran tama&ntilde;o potencial y la posibilidad de estimular estructuras &oacute;seas profundas o de comprimir tejidos vecinos. A diferencia de las formas cut&aacute;neas y subcut&aacute;neas, los neurofi bromas plexiformes tienen riesgo promedio de 5% (2 a 16%<sup>13</sup>) a lo largo de la vida de transformaci&oacute;n en tumor maligno perif&eacute;rico de la vaina nerviosa.<sup>1, 22, 23</sup></p>      <p>Los neurofibromas plexiformes son cong&eacute;nitos en su mayor&iacute;a y se presentan en el 30% de los pacientes con NF1. Estos tumores representan la principal causa de morbilidad y mortalidad, afectan las porciones largas de nervios perif&eacute;ricos y el tejido adyacente, causando malformaciones muy extendidas y complicaciones mec&aacute;nicas que pueden afectar las estructuras vasculares profundas.<sup>13</sup> De la misma manera, pacientes con NF1 presentan con m&aacute;s frecuencias otros tumores como los feocromocitomas y leucemias.<sup>17</sup></p>      ]]></body>
<body><![CDATA[<p>El gen afectado en la NF1 se presenta en 17q.<sup>11.2,24, 25</sup> un gen de gran tama&ntilde;o que puede medir hasta 350 kb. El producto de este gen, la neurofibromina, es una prote&iacute;na citoplasm&aacute;tica de gran tama&ntilde;o con una regi&oacute;n central que muestra una secuencia similar a la familia de las prote&iacute;nas activadores de las GTPasas (GAP), las cuales est&aacute;n involucradas en la regulaci&oacute;n negativa de ras.<sup>26,27</sup> El aumento en la actividad de ras, asociado con la ausencia de neurofibromina, ha sido relacionado con la aparici&oacute;n de muchos de los tumores que se presentan en los casos de NF1: neurofi bromas,<sup>28</sup> astrocitomas<sup>29</sup> y tumores malignos perif&eacute;ricos de la vaina nerviosa.<sup>30</sup></p>      <p>La anomal&iacute;a en el gen de la neurofibromina, en combinaci&oacute;n con el funcionamiento de otros &ldquo;genes modificadores&rdquo; como el p53, es una de las posibles razones en la expresi&oacute;n variable de esta patolog&iacute;a aun en individuos de una misma familia.<sup>13</sup> Recientemente se han hecho disponibles pruebas a nivel molecular para NF1. Debido al gran tama&ntilde;o del gen NF1 y la falta de mutaciones espec&iacute;ficas, se ha implementado un protocolo escalonado. Algunos expertos opinan que los criterios de diagn&oacute;sticos deber&iacute;an ser modificados para incluir un test molecular positivo como un criterio diagn&oacute;stico definitivo.<sup>19, 31-34</sup></p>      <p>En pacientes con NF1 se deben tener en cuenta otras anomal&iacute;as que pueden estar presentes. Entre las cuales est&aacute;n alteraciones &oacute;seas como escoliosis, displasia de huesos largos, corta estatura, osteopenia y osteoporosis.<sup>8, 35-37</sup> Tambi&eacute;n pueden presentar dificultad de aprendizaje, d&eacute;ficit de atenci&oacute;n o des&oacute;rdenes de hiperactividad.<sup>38-41</sup> Los gliomas &oacute;pticos y los n&oacute;dulos de Lish son patolog&iacute;as oftalmol&oacute;gicas que tambi&eacute;n deben descartarse.<sup>42-48</sup></p>      <p>El diagn&oacute;stico se basa en caracter&iacute;sticas cl&iacute;nicas, para que sea confirmatorio se deben presentar dos o m&aacute;s de las siguientes: 1) seis o m&aacute;s manchas color &ldquo;caf&eacute; en leche&rdquo; que deben ser mayores de 5 mm en pacientes prepuberales, o mayores de 15 mm en pacientes postpuberales, 2) m&aacute;culas en la regi&oacute;n axilar o inguinal, 3) dos o m&aacute;s neurofibromas de cualquier tipo o un neurofibroma plexiforme, 4) lesiones &oacute;seas, 5) un pariente en primer grado de consanguinidad con NF1, 6) glioma &oacute;ptico y 7) dos o m&aacute;s n&oacute;dulos de Lisch.6, 7 El 97% de los pacientes con NF1 cumplir&aacute; estos criterios despu&eacute;s de los ocho a&ntilde;os.<sup>8</sup> A nuestra paciente se le confirmaron seis de estos hallazgos cl&iacute;nicos, exceptuando glioma &oacute;ptico. Los n&oacute;dulos de Lisch fueron confirmados por el servicio de oftalmolog&iacute;a, sin encontrarse cambios en la agudeza visual.</p>      <p>En la regi&oacute;n oral y maxilofacial, la NF1 de tipo plexiforme tiene particular importancia. Estos tumores se originan con frecuencia de ramas del nervio trig&eacute;mino e invaden tanto la cavidad oral como sus paredes laterales.<sup>49</sup> Los cirujanos orales y maxilofaciales han reportado con frecuencia las alteraciones est&eacute;ticas severas asociadas a NF1 y la dificultad para su tratamiento.<sup>10, 49-55</sup></p>      <p>Friedrich<sup>49</sup> enumer&oacute; las alteraciones en la regi&oacute;n maxilofacial asociadas a NF1, entre estas est&aacute;n la elongaci&oacute;n y adelgazamiento de los procesos articular y coronoides, acortamiento de la rama, dientes retenidos e irregularidades del reborde marginal mandibular. Shapiro<sup>10</sup> en un estudio tiene entre sus hallazgos neurofibromas orales, papilas fungiformes aumentadas en volumen, lesiones intra&oacute;seas que afectaban principalmente el hueso mandibular, canal alveolar inferior amplio, foramen mandibular ampliado. Otros autores han asociado la NF1 con aplasia o agenesia de segundos molares o con otras alteraciones en la cantidad de dientes presentes.<sup>49</sup></p>      <p>El tratamiento de esta anomal&iacute;a consiste antes que todo en la concientizaci&oacute;n del paciente y su familia de las caracter&iacute;sticas de la enfermedad, de su transmisi&oacute;n gen&eacute;tica y de las limitaciones de su tratamiento.<sup>11</sup> Los neurofibromas, en cualquiera de sus tipos, solo pueden ser tratados de manera quir&uacute;rgica, buscando mejor&iacute;a en el aspecto cosm&eacute;tico y para evitar un d&eacute;ficit funcional.<sup>1, 8, 19</sup> Actualmente no existe manejo farmacol&oacute;gico disponible, pero se est&aacute;n adelantando estudios con diferentes tipos de f&aacute;rmacos que tratan de controlar el crecimiento de los tumores, mejorar el aspecto de las manifestaciones cut&aacute;neas o disminuir la afecci&oacute;n cognitiva que con frecuencia se da en compa&ntilde;&iacute;a de esta patolog&iacute;a.<sup>56-67</sup></p>      <p>Los conocimientos gen&eacute;ticos de la funci&oacute;n del gen afectado en la NF1 direccionan los estudios cl&iacute;nicos actuales hacia el desarrollo de inhibidores de ras que podr&iacute;an disminuir la expresi&oacute;n fenot&iacute;pica de este tipo de anomal&iacute;as.<sup>13</sup></p>       <p>&nbsp;</p>      <p><font size="3" face="Verdana"><b>REFERENCIAS</b></font></p>      ]]></body>
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Krab LC, de Goede-Bolder A, Aarsen FK, Pluijm SM, Bouman MJ, van der Geest JN et al. Effect of simvastatin on cognitive functioning in children with neurofibromatosis type 1: a randomized controlled trial. JAMA 2008; 300: 287-294.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000129&pid=S0121-246X201000010001000067&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><p>&nbsp;</p>     <p>&nbsp;</p>      <p><b>RECIBIDO: MARZO 31/2009 - ACEPTADO: ENERO 26/2010</b></p>       ]]></body>
<body><![CDATA[<p>&nbsp;</p>     <p>&nbsp;</p>      <p><font size="3" face="Verdana"><b>CORRESPONDENCIA</b></font></p>      <p>Francisco Levi Duque S.    <br> Facultad de Odontolog&iacute;a    <br> Universidad de Antioquia    <br> Medell&iacute;n, Colombia    <br> Correo electr&oacute;nico: <a href="mailto:flds@une.net.co">flds@une.net.co</a>       <p><b>C&oacute;mo citar este art&iacute;culo:</b></p>       <p>Duque FL, Ram&iacute;rez OA. Neurofibromatosis: reporte de un caso. Rev Fac Odontol Univ Antioq 2010; 21(2): 218-225.</p>      ]]></body>
<body><![CDATA[<p>Duque FL, Ram&iacute;rez OA. Neurofibromatosis: a case report. Rev Fac Odontol Univ Antioq 2010; 21(2): 218-225.</p>  </font>       ]]></body><back>
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