<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1130-1473</journal-id>
<journal-title><![CDATA[Neurocirugía]]></journal-title>
<abbrev-journal-title><![CDATA[Neurocirugía]]></abbrev-journal-title>
<issn>1130-1473</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Española de Neurocirugía]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1130-14732011000300006</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Enfermedad de Rosai-Dorfman intracraneal: Presentación de un caso y revisión de la literatura]]></article-title>
<article-title xml:lang="en"><![CDATA[Isolated intracranial Rosai-Dorfman disease: A case report and literature review]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Triana-Pérez]]></surname>
<given-names><![CDATA[A.B.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Medina]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Del Rosario]]></surname>
<given-names><![CDATA[P.A.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Millán-Corada]]></surname>
<given-names><![CDATA[A.M.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez-Perals]]></surname>
<given-names><![CDATA[L.F.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez-Báez]]></surname>
<given-names><![CDATA[J.J.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Hospital Universitario Nuestra Señora de Candelaria Servicio de Neurocirugía ]]></institution>
<addr-line><![CDATA[Santa Cruz de Tenerife ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2011</year>
</pub-date>
<volume>22</volume>
<numero>3</numero>
<fpage>255</fpage>
<lpage>260</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_arttext&amp;pid=S1130-14732011000300006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_abstract&amp;pid=S1130-14732011000300006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_pdf&amp;pid=S1130-14732011000300006&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Introducción. La histiocitosis sinusal con linfadenopatías masivas (HSLM), también conocida como enfermedad de Rosai-Dorfman (ERD), es una histiocitosis idiopática que suele afectar a los ganglios linfáticos. Ocasionalmente puede afectar al SNC, siendo excepcional la afectación intracraneal sin lesiones ganglionares. En ausencia de signos radiológicos típicos, los pacientes afectos son generalmente intervenidos bajo la sospecha de un meningioma, obteniéndose el diagnóstico histológico tras el procedimiento quirúrgico. Es una entidad clínico-patológica poco conocida, existiendo controversia sobre su etiopatogenia, curso clínico y manejo terapéutico. Caso clínico. Presentamos el caso de un paciente de 40 años que debutó con dos crisis tónico-clónicas generalizadas y en la RM cerebral se objetivó una lesión extraaxial parieto-occipital izquierda con extensión hacia la fosa posterior, sin presentar lesiones a otros niveles. Se realizó una resección parcial de la lesión y la anatomía patológica fue informada como enfermedad de Rosai-Dorfman. Conclusiones. A pesar de su baja frecuencia, deberíamos incluir a la ERD en el diagnóstico diferencial de las lesiones nodulares durales, frente a otras más frecuentes como son los meningiomas. Debido a la inespecificidad de las pruebas complementarias su diagnóstico es eminentemente histológico. Se precisan más estudios para definir la mejor opción terapéutica.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Introduction. Sinus histiocytosis with massive lymphadenopathy, also known as Rosai-Dorfman disease (RDD) is an idiopathic histiocytosis that usually affects the lymph nodes. Occasionally it may affect the CNS, being exceptional intracranial involvement without lymph node lesions. In the absence of typical radiological signs, affected patients are generally operated under the suspicion of a meningioma. The histological diagnosis is obtained after the surgical procedure. It is a clinicopathological entity not well known, controversy exists about its pathogenesis, clinical course and therapeutic management. Case report. We report the case of a 40-year-old male presented two generalized tonic-clonic seizures and brain MRI showed a left parieto-occipital extra-axial lesion extending into the posterior fossa, without presenting lesions at other levels. A partial resection of the lesion was performed and the histological findings were reported as Rosai-Dorfman disease. Conclusions. Despite its low frequency, the ERD should be included in the differential diagnosis of dural-based masses, compared to more common, such as meningiomas. Due to lack of specificity of additional studies its diagnosis is fundamentally histologic. More research is needed to define the best therapeutic option.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Enfermedad de Rosai-Dorfman]]></kwd>
<kwd lng="es"><![CDATA[Histiocitosis sinusal con linfadenopatías masivas]]></kwd>
<kwd lng="es"><![CDATA[Emperipolesis]]></kwd>
<kwd lng="en"><![CDATA[Rosai-Dorfman disease]]></kwd>
<kwd lng="en"><![CDATA[Sinus histiocytosis with massive lymphadenopathy]]></kwd>
<kwd lng="en"><![CDATA[Emperipolesis]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p>&nbsp;</p>     <p>&nbsp;</p>     <p><a name="top"></a><font face="Verdana" size="4"><b>Enfermedad de Rosai-Dorfman intracraneal. Presentaci&oacute;n de un caso y revisi&oacute;n de la literatura</b></font></p>     <p><font face="Verdana" size="4"><b>Isolated intracranial Rosai-Dorfman disease: A case report and literature review</b></font></p>     <p>&nbsp;</p>     <p>&nbsp;</p>     <p><font face="Verdana" size="2"><b>A.B. Triana-P&eacute;rez: Y. S&aacute;nchez-Medina; P.A. P&eacute;rez-Del Rosario; A.M. Mill&aacute;n-Corada; L.F. G&oacute;mez-Perals y J.J. Dom&iacute;nguez-B&aacute;ez</b></font></p>     <p><font face="Verdana" size="2">Servicio de Neurocirug&iacute;a. Hospital Universitario Nuestra Se&ntilde;ora de Candelaria. Santa Cruz de Tenerife.</font></p>     <p><font face="Verdana" size="2"><a href="#back">Direcci&oacute;n para correspondencia</a></font></p>     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p> <hr size="1">     <p><font face="Verdana" size="2"><b>RESUMEN</b></font></p>     <p><font face="Verdana" size="2"><b>Introducci&oacute;n.</b> La histiocitosis sinusal con linfadenopat&iacute;as masivas (HSLM), tambi&eacute;n conocida como enfermedad de Rosai-Dorfman (ERD), es una histiocitosis idiop&aacute;tica que suele afectar a los ganglios linf&aacute;ticos. Ocasionalmente puede afectar al SNC, siendo excepcional la afectaci&oacute;n intracraneal sin lesiones ganglionares. En ausencia de signos radiol&oacute;gicos t&iacute;picos, los pacientes afectos son generalmente intervenidos bajo la sospecha de un meningioma, obteni&eacute;ndose el diagn&oacute;stico histol&oacute;gico tras el procedimiento quir&uacute;rgico. Es una entidad cl&iacute;nico-patol&oacute;gica poco conocida, existiendo controversia sobre su etiopatogenia, curso cl&iacute;nico y manejo terap&eacute;utico.    <br><b>Caso cl&iacute;nico.</b> Presentamos el caso de un paciente de 40 a&ntilde;os que debut&oacute; con dos crisis t&oacute;nico-cl&oacute;nicas generalizadas y en la RM cerebral se objetiv&oacute; una lesi&oacute;n extraaxial parieto-occipital izquierda con extensi&oacute;n hacia la fosa posterior, sin presentar lesiones a otros niveles. Se realiz&oacute; una resecci&oacute;n parcial de la lesi&oacute;n y la anatom&iacute;a patol&oacute;gica fue informada como enfermedad de Rosai-Dorfman.    <br><b>Conclusiones.</b> A pesar de su baja frecuencia, deber&iacute;amos incluir a la ERD en el diagn&oacute;stico diferencial de las lesiones nodulares durales, frente a otras m&aacute;s frecuentes como son los meningiomas. Debido a la inespecificidad de las pruebas complementarias su diagn&oacute;stico es eminentemente histol&oacute;gico. Se precisan m&aacute;s estudios para definir la mejor opci&oacute;n terap&eacute;utica.</font></p>     <p><font face="Verdana" size="2"><b>Palabras clave:</b> Enfermedad de Rosai-Dorfman. Histiocitosis sinusal con linfadenopat&iacute;as masivas, Emperipolesis.</font></p> <hr size="1">     <p><font face="Verdana" size="2"><b>SUMMARY</b></font></p>     <p><font face="Verdana" size="2"><b>Introduction.</b> Sinus histiocytosis with massive lymphadenopathy, also known as Rosai-Dorfman disease (RDD) is an idiopathic histiocytosis that usually affects the lymph nodes. Occasionally it may affect the CNS, being exceptional intracranial involvement without lymph node lesions. In the absence of typical radiological signs, affected patients are generally operated under the suspicion of a meningioma. The histological diagnosis is obtained after the surgical procedure. It is a clinicopathological entity not well known, controversy exists about its pathogenesis, clinical course and therapeutic management.    <br><b>Case report.</b> We report the case of a 40-year-old male presented two generalized tonic-clonic seizures and brain MRI showed a left parieto-occipital extra-axial lesion extending into the posterior fossa, without presenting lesions at other levels. A partial resection of the lesion was performed and the histological findings were reported as Rosai-Dorfman disease.    <br><b>Conclusions.</b> Despite its low frequency, the ERD should be included in the differential diagnosis of dural-based masses, compared to more common, such as meningiomas. Due to lack of specificity of additional studies its diagnosis is fundamentally histologic. More research is needed to define the best therapeutic option.</font></p>     ]]></body>
<body><![CDATA[<p><font face="Verdana" size="2"><b>Key words:</b> Rosai-Dorfman disease. Sinus histiocytosis with massive lymphadenopathy. Emperipolesis.</font></p> <hr size="1">     <p>&nbsp;</p>     <p><font face="Verdana" size="2"><b>Introducci&oacute;n</b></font></p>     <p><font face="Verdana" size="2">La enfermedad de Rosai-Dorfman (ERD) descrita cl&aacute;sicamente como un trastorno histioc&iacute;tico proliferativo cursa con adenopat&iacute;as masivas indoloras cervicales asociadas invariablemente con fiebre, velocidad de sedimentaci&oacute;n globular (VSG) elevada, hipergammaglobulinemia policlonal y p&eacute;rdida de peso. Desde el punto de vista histol&oacute;gico las lesiones presentan un infiltrado linfohistiocitario con la presencia intracitoplasm&aacute;tica de linfocitos intactos, fen&oacute;meno conocido como &quot;emperipolesis&quot;<sup>12,18,24,26,27</sup> que es caracter&iacute;stico de esta entidad aunque no patognom&oacute;nico. Este cuadro cl&iacute;nico-patol&oacute;gico fue acu&ntilde;ado como &quot;Histiocitosis Sinusal con Linfadenopat&iacute;as Masivas&quot; por Rosai y Dorfman<sup>26</sup>. En aproximadamente el 43% de los casos existe afectaci&oacute;n extraganglionar<sup>7</sup>, siendo piel, &oacute;rbita y tracto respiratorio superior los &oacute;rganos m&aacute;s afectados. Las manifestaciones neurol&oacute;gicas por afectaci&oacute;n del SNC son extremadamente raras (4%), siendo todav&iacute;a menos frecuente la afectaci&oacute;n intracraneal en ausencia de afectaci&oacute;n ganglionar (0.5%)<sup>7</sup>. En una reciente revisi&oacute;n de la literatura Russo et al.<sup>28</sup> reportan s&oacute;lo 24 casos de ERD intracraneal sin afectaci&oacute;n nodal. Las lesiones intracraneales se suelen presentar como lesiones extra-axiales con base dural tanto a nivel de la convexidad como de la base craneal. En este art&iacute;culo presentamos un caso de ERD intracraneal sin afectaci&oacute;n ganglionar y se revisa la literatura.</font></p>     <p>&nbsp;</p>     <p><font face="Verdana" size="2"><b>Caso cl&iacute;nico</b></font></p>     <p><font face="Verdana" size="2">Paciente var&oacute;n de 40 a&ntilde;os de edad, fumador y consumidor de coca&iacute;na de forma espor&aacute;dica, sin antecedentes m&eacute;dico-quir&uacute;rgicos de inter&eacute;s que ingres&oacute; en el Servicio de Neurolog&iacute;a (2006) por presentar dos crisis t&oacute;nico-cl&oacute;nicas generalizadas adem&aacute;s de cefaleas de reciente aparici&oacute;n con fen&oacute;menos visuales acompa&ntilde;antes consistentes en sensaci&oacute;n de cortina de agua en campo temporal del ojo derecho. La exploraci&oacute;n sist&eacute;mica y neurol&oacute;gica fue rigurosamente normal. Se realizaron m&uacute;ltiples estudios complementarios: anal&iacute;tica con serolog&iacute;a y perfil vascul&iacute;tico, punci&oacute;n lumbar con protocolo desmielinizante, EEG, doppler transcraneal y ecodoppler de troncos supra-a&oacute;rticos, estudio cardiol&oacute;gico (ecocardiograma y Holter) y RM cerebral. Entre &eacute;stas s&oacute;lo destacaba en la anal&iacute;tica una VSG de 40 mm, y en la RM con estudio de difusi&oacute;n y vascular arterial, una lesi&oacute;n occipital izquierda que fue informada como ictus isqu&eacute;mico subagudo tard&iacute;o en el territorio de la arteria cerebral posterior izquierda (<a href="#f1">figura 1</a>). Ante estos hallazgos fue diagnosticado de crisis parciales visuales secundariamente generalizadas en el contexto de un ictus en el territorio de la arteria cerebral posterior izquierda. El paciente fue dado de alta, paut&aacute;ndose tratamiento con antiagregantes y f&aacute;rmacos antiepil&eacute;pticos (FAE), no presentado nuevas crisis comiciales aunque persist&iacute;an episodios de cefalea acompa&ntilde;ada de trastornos visuales. En seguimiento por el Servicio de Neurolog&iacute;a se realiz&oacute; nueva RM cerebral (2008) donde se vio una modificaci&oacute;n manifiesta de las caracter&iacute;sticas radiol&oacute;gicas de la lesi&oacute;n, objetiv&aacute;ndose una masa extraaxial parieto-occipital izquierda que se extend&iacute;a al hemisferio contralateral e infratentorialmente (<a href="#f2">figura 2</a>). Se practic&oacute; una craneotom&iacute;a parieto-occipital izquierda observ&aacute;ndose macrosc&oacute;picamente una lesi&oacute;n extraaxial rojo- gris&aacute;cea que se extend&iacute;a subduralmente en placas, con &aacute;reas mamelonadas que infiltraba la corteza sin respetar el plano aracnoideo. Se realiz&oacute; una resecci&oacute;n parcial persistiendo la parte de la lesi&oacute;n localizada en el seno longitudinal superior, t&oacute;rcula, regi&oacute;n falcotentorial e infratentorial. Se tom&oacute; una muestra para biopsia intraoperatoria siendo informada como fragmento de meninge con infiltrado inflamatorio mixto, rico en c&eacute;lulas plasm&aacute;ticas. Ante estos resultados, se solicit&oacute; un mapa &oacute;seo y un proteinograma sin encontrar hallazgos patol&oacute;gicos que sugirieran una gammapat&iacute;a monoclonal. El informe anatomo-patol&oacute;gico concluy&oacute; que la lesi&oacute;n correspond&iacute;a a una Histiocitosis tipo Enfermedad de Rosai-Dorfman. El paciente ha evolucionado favorablemente presentando s&oacute;lo episodios aislados de cefalea de predominio hemicraneal izquierda que alivian con analgesia habitual adem&aacute;s de una hemianopsia hom&oacute;nima derecha residual. En controles radiol&oacute;gicos posteriores se ha observado mejor&iacute;a de las lesiones a nivel de la convexidad parieto-occipital izquierda y del edema asociado con persistencia de los restos lesionales que no han progresado durante un seguimiento de 19 meses.</font></p>     <p align="center"><font face="Verdana" size="2"><a name="f1"><img src="/img/revistas/neuro/v22n3/caso2_f1.jpg" width="541" height="337"></a>    <br>Figura 1. <i>RM cerebral (2006) en la que se observa una lesi&oacute;n c&oacute;rtico-subcortical occipital    <br>izquierda de morfolog&iacute;a triangular, hiperintensa en secuencias T2 FLAIR (A) con escasa restricci&oacute;n de la difusi&oacute;n (B).</i></font></p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p>     <p align="center"><font face="Verdana" size="2"><a name="f2"><img border="0" src="/img/revistas/neuro/v22n3/caso2_f2.jpg" width="600" height="234"></a>    <br>Figura 2. <i>RM cerebral (2008). Se objetiva una lesi&oacute;n extraaxial, parieto-occipital izquierda con    <br>base dural, que se extiende al hemisferio contralateral e infratentorialmente, present&aacute;ndose isointensa    <br>en secuencia T2 FLAIR (A) con intenso edema perilesional que ejerce efecto masa sobre el asta    <br>occipital ipsilateral, y que realza intensamente con contraste (B y C).</i></font></p>     <p>&nbsp;</p>     <p><font face="Verdana" size="2"><b>Discusi&oacute;n</b></font></p>     <p><font face="Verdana" size="2"><i>Historia y etiopatogenia</i></font></p>     <p><font face="Verdana" size="2">La ERD fue descrita por primera vez por Destombes<sup>4</sup> en 1965, denomin&aacute;ndola &quot;adenitis con exceso lip&iacute;dico&quot; porque consideraba que se trataba de un trastorno del metabolismo lip&iacute;dico. En 1969 Rosai y Dorfman<sup>26</sup> introducen el t&eacute;rmino &quot;histiocitosis sinusal con linfadenopat&iacute;as masivas&quot; (HSLM) para hacer referencia a esta entidad caracterizada por voluminosas linfadenopatias cervicales, expansi&oacute;n sinusal ganglionar y la presencia casi constante del fen&oacute;meno de emperipolesis (linfofagocitosis)<sup>12,18,24,26,27</sup>. En general, se emplea el t&eacute;rmino de HSLM para referirse a la forma cl&aacute;sica de presentaci&oacute;n de la enfermedad, reserv&aacute;ndose la denominaci&oacute;n de ERD para aquellos casos en que no existe afectaci&oacute;n ganglionar.</font></p>     ]]></body>
<body><![CDATA[<p><font face="Verdana" size="2">Se ha clasificado por consenso como una histiocitosis idiop&aacute;tica<sup>8,33</sup>, aunque hay autores que propugnan que se trata de un trastorno inmunol&oacute;gico que se produce como respuesta a un agente infeccioso<sup>25</sup>. Algunos de los g&eacute;rmenes implicados en su patog&eacute;nesis han sido el Herpesvirus<sup>6</sup>, el virus Epstein-Barr<sup>16,29</sup> y m&aacute;s recientemente el Parvovirus B19<sup>20</sup>. Por otra parte, estudios de biolog&iacute;a molecular muestran un origen policlonal del infiltrado celular de las lesiones<sup>22</sup>, lo que induce a pensar en un origen reactivo m&aacute;s que neopl&aacute;sico de la enfermedad. A pesar de estas hip&oacute;tesis, su etiopatogenia actualmente sigue siendo desconocida.</font></p>     <p><font face="Verdana" size="2"><i>Epidemiolog&iacute;a</i></font></p>     <p><font face="Verdana" size="2">Cuando afecta al SNC se presenta a edades m&aacute;s tard&iacute;as (4<sup>a</sup>-5<sup>a</sup> d&eacute;cadas) que la forma cl&aacute;sica con afectaci&oacute;n ganglionar cervical que suele afectar a ni&ntilde;os y adolescentes<sup>3,7</sup>, aunque se han descrito casos en la infancia<sup>5,10,30</sup>. Hay autores que plantean la posibilidad de que se traten de dos entidades cl&iacute;nicas diferentes<sup>28</sup>, aunque histol&oacute;gicamente las lesiones sean id&eacute;nticas. Muestra predilecci&oacute;n por el sexo masculino (66%) sin distinci&oacute;n entre razas<sup>35</sup>.</font></p>     <p><font face="Verdana" size="2"><i>Presentaci&oacute;n cl&iacute;nica y pruebas complementarias</i></font></p>     <p><font face="Verdana" size="2">A nivel craneal se suelen presentar como una lesi&oacute;n supratentorial extra-axial con base dural, no obstante se ha descrito la aparici&oacute;n de lesiones intraprenquimatosas<sup>9,21</sup>. Dentro de las localizaciones m&aacute;s frecuentes se encuentran la convexidad, seno cavernoso, regiones parasagital, supra-paraselar y petroclival<sup>1,30,31,33,34</sup>. En ocasiones, se puede presentar como lesiones m&uacute;ltiples<sup>14,28,32</sup>. En nuestro caso, la lesi&oacute;n se extend&iacute;a desde la convexidad parieto-occipital hacia la fosa posterior, donde su ubicaci&oacute;n es menos frecuente<sup>3,5,9</sup>.</font></p>     <p><font face="Verdana" size="2">Desde el punto de vista cl&iacute;nico puede manifestarse con cefaleas, crisis comiciales, afectaci&oacute;n de pares craneales o signos neurol&oacute;gicos focales dependiendo de su localizaci&oacute;n. En aproximadamente el 30% de los casos existe afectaci&oacute;n ganglionar pudiendo debutar como un s&iacute;ndrome constitucional, con adenomegalias y fiebre<sup>7,8,24,26</sup>.</font></p>     <p><font face="Verdana" size="2">Los hallazgos de laboratorio son inespec&iacute;ficos pudiendo encontrar hipergammaglobulinemia policlonal, moderada anemia (normoc&iacute;tica normocr&oacute;mica o microc&iacute;tica hipocr&oacute;mica) y aumento de la VSG. Otras prote&iacute;nas s&eacute;ricas como el factor reumatoideo o anticuerpos antinucleares pueden estar elevadas, aunque no se conoce su implicaci&oacute;n en la fisiopatolog&iacute;a de la enfermedad<sup>8,24,29,33</sup>.</font></p>     <p><font face="Verdana" size="2">En la RM se suele observar como una lesi&oacute;n extra-axial con base dural, iso o hipointensa en secuencias T1 y T2 (ocasionalmente hiperintensa en T2<sup>5</sup>) que suele captar contraste de forma intensa y homog&eacute;nea<sup>1,15,28,36</sup>. Desde el punto de vista radiol&oacute;gico hay que plantear el diagn&oacute;stico diferencial fundamentalmente con los meningiomas, y otras entidades como el melanoma, la carcinomatosis men&iacute;ngea y enfermedades inflamatorias granulomatosas (tuberculosis o sarcoidosis)<sup>13,15,35,36</sup>.</font></p>     <p><font face="Verdana" size="2"><i>Histolog&iacute;a</i></font></p>     <p><font face="Verdana" size="2">Debido a la inespecificidad de las pruebas anal&iacute;ticas y de imagen, el diagn&oacute;stico de esta entidad es eminentemente histol&oacute;gico. Las lesiones ganglionares son desde el punto de vista histopatol&oacute;gico similares a las lesiones de localizaci&oacute;n extranodal. Presentan un gran infiltrado linfohistiocitario, con un n&uacute;cleo grande o vesicular, con membranas nucleares bien definidas y un nucleolo &uacute;nico y prominente. La caracter&iacute;stica principal es la presencia intracitoplasm&aacute;tica de linfocitos y en menor medida de eritrocitos, plasmocitos y neutr&oacute;filos intactos (&quot;emperipolesis&quot;), no obstante, puede estar ausente en el 30% de las lesiones leptomen&iacute;ngeas<sup>24</sup> (<a href="#f3">figura 3</a>). Asociado a la proliferaci&oacute;n histiocitaria, se puede observar un infiltrado plasmocitario perivascular. Desde el punto de vista inmunohistoqu&iacute;mico se caracterizan por presentar prote&iacute;na S100+, CD68+, CD11c+, MAC387+, lisozima +/-, siendo negativos para CD1a, marcador positivo en la histiocitosis de c&eacute;lulas de Langerhans (HCL). En el diagn&oacute;stico diferencial histopatol&oacute;gico se incluyen la HCL, el meningioma linfoplasmoc&iacute;tico, la enfermedad de Hodgkin (variedad nodular esclerosante), el pseudotumor inflamatorio y el plasmocitoma<sup>1,8,12,18,24,26,27,33</sup>.</font></p>     ]]></body>
<body><![CDATA[<p align="center"><font face="Verdana" size="2"><a name="f3"><img border="0" src="/img/revistas/neuro/v22n3/caso2_f3.jpg" width="459" height="600"></a>    <br>Figura 3. <i>Preparaciones histol&oacute;gicas de nuestro caso. A) H-E x 20.    <br>Se observan las c&eacute;lulas histioc&iacute;ticas que se acompa&ntilde;an de un denso infiltrado    <br>inflamatorio con gran cantidad de c&eacute;lulas plasm&aacute;ticas. B) Se aprecia en detalle    <br>los fen&oacute;menos de emperipolesis (histiocitos que fagocitan linfocitos y hemat&iacute;es).</i></font></p>     <p>&nbsp;</p>     <p><font face="Verdana" size="2"><i>Tratamiento</i></font></p>     <p><font face="Verdana" size="2">Respecto al manejo terap&eacute;utico de la ERD no existe un consenso globalmente aceptado aunque se admite como mejor opci&oacute;n la resecci&oacute;n quir&uacute;rgica completa cuando &eacute;sta es posible, ya que en ocasiones la extensi&oacute;n de la lesi&oacute;n hacia los senos durales, como en nuestro caso hacen inviable la extirpaci&oacute;n radical.</font></p>     <p><font face="Verdana" size="2">Konishi et al.<sup>15</sup> publican un caso en que una lesi&oacute;n frontal permanece estable durante dos a&ntilde;os &uacute;nicamente con tratamiento sintom&aacute;tico (FAE), lo que nos indica que hay lesiones que pueden no progresar incluso sin tratamiento. En el caso que presentamos las lesiones residuales han permanecido estables durante 19 meses sin tratamiento adyuvante.</font></p>     <p><font face="Verdana" size="2">En la literatura existen casos que demuestran una buena respuesta a los corticoides<sup>17,30</sup>, cabe rese&ntilde;ar el art&iacute;culo de McPherson et al.<sup>19</sup> en el que relatan el caso de un paciente de 53 a&ntilde;os con lesiones m&uacute;ltiples a nivel selar con extensi&oacute;n paraselary en fosa posterior en el que se practic&oacute; una resecci&oacute;n parcial de la lesi&oacute;n selar-paraselar con descompresi&oacute;n del aparato &oacute;ptico. Posteriormente recibi&oacute; tratamiento con prednisona, objetiv&aacute;ndose en el seguimiento radiol&oacute;gico once meses despu&eacute;s de la cirug&iacute;a, la remisi&oacute;n no s&oacute;lo de los restos postquir&uacute;rgicos a nivel selar-paraselar, sino tambi&eacute;n de las lesiones localizadas en la fosa posterior sobre las que no se hab&iacute;a actuado quir&uacute;rgicamente.</font></p>     ]]></body>
<body><![CDATA[<p><font face="Verdana" size="2">Recientemente, en algunos pacientes con ERD sist&eacute;mica se han obtenidos resultados prometedores mediante la administraci&oacute;n de cladribina<sup>2</sup>, nucle&oacute;sido an&aacute;logo de las purinas que inhibe la proliferaci&oacute;n de los linfocitos T, la producci&oacute;n de interleuquina 6 e interfiere con los monocitos, aunque su papel en la ERD intracraneal est&aacute; a&uacute;n por determinar.</font></p>     <p><font face="Verdana" size="2">Cuando no es posible la ex&eacute;resis completa de la lesi&oacute;n se ha empleado como tratamiento la radioterapia convencional<sup>23</sup>, la radiocirug&iacute;aestereot&aacute;xica<sup>11</sup> e incluso la radioterapia intersticial<sup>6</sup> con I<sup>125</sup>, obteni&eacute;ndose en algunos casos buenos resultados.</font></p>     <p><font face="Verdana" size="2">De la revisi&oacute;n de la literatura se extrae que no existe un tratamiento protocolizado, pero creemos que el tratamiento de elecci&oacute;n debe incluir la resecci&oacute;n quir&uacute;rgica completa cuando &eacute;sta sea posible, tanto con fines terap&eacute;uticos como diagn&oacute;sticos, ya que en aquellos casos en que se logra una resecci&oacute;n completa la probabilidad de recurrencia es muy baja<sup>1,28</sup>. En caso de no ser posible la extirpaci&oacute;n completa, el crecimiento de las lesiones residuales o la progresi&oacute;n de los s&iacute;ntomas neurol&oacute;gicos podr&iacute;an indicar la necesidad de recibir tratamiento coadyuvante con radioterapia, radiocirug&iacute;a o tratamiento corticoideo.</font></p>     <p><font face="Verdana" size="2"><i>Pron&oacute;stico</i></font></p>     <p><font face="Verdana" size="2">El pron&oacute;stico en general es bueno, existiendo casos con regresi&oacute;n espont&aacute;nea en la forma sist&eacute;mica, aunque no en la ERD intracraneal. Un peque&ntilde;o porcentaje de pacientes puede evolucionar de forma fatal, sobre todo en aquellos casos en que existe extensa afectaci&oacute;n ganglionar y extraganglionar<sup>35</sup>.</font></p>     <p>&nbsp;</p>     <p><font face="Verdana" size="2"><b>Conclusiones</b></font></p>     <p><font face="Verdana" size="2">Aunque excepcionalmente rara, es necesario incluir a la ERD en el diagn&oacute;stico diferencial de las lesiones nodulares durales, frente a otras m&aacute;s frecuentes como son los meningiomas. Las pruebas radiol&oacute;gicas pueden ser orientativas, pero solamente los estudios histol&oacute;gicos e inmunohistoqu&iacute;micos permiten un diagn&oacute;stico de certeza.</font></p>     <p><font face="Verdana" size="2">Se precisan estudios de mayor casu&iacute;stica y un seguimiento a m&aacute;s largo plazo, para definir la opci&oacute;n terap&eacute;utica m&aacute;s adecuada.</font></p>     <p>&nbsp;</p>     ]]></body>
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Woodcock, R.J., Mandell, J.W., Lipper, M.H.: Sinus histiocytosis (Rosai-Dorfman disease) of the suprasellar region: MRI imaging findings. A case report. Radiology 1999; 213: 808-810.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=3382173&pid=S1130-1473201100030000600034&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>    <!-- ref --><p><font face="Verdana" size="2">35. Wu, M., Anderson, A.E., Kahn, L.B.: A report of intracranial Rosai-Dorfman disease with literature review. Ann Diagn Pathol 2001; 5: 96-102.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=3382175&pid=S1130-1473201100030000600035&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>    <!-- ref --><p><font face="Verdana" size="2">36. Xiaoping, Y., Chunshui, Y., Kuncheng, L., Yueshan, P., Dehong, L.: Isolated intracranial Rosai-Dorfman disease: A case report with CT and MR findings. European J Radiology Extra 2007; 61: 77-80.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=3382177&pid=S1130-1473201100030000600036&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <p>&nbsp;</p>     <p>&nbsp;</p>     <p><font face="Verdana" size="2"><a name="back"></a><a href="#top"><img src="/img/revistas/neuro/v22n3/seta.jpg" border="0"></a><b>Dirección para correspondencia:</b>    <br>Hospital Universitario Nuestra Se&ntilde;ora de Candelaria.    <br>Crta. del Rosario, s/n. 38010. Santa Cruz de Tenerife.    <br>E- mail: <a href="mailto:neurocirugia@hotmail.com">neurocirugia@hotmail.com</a>.</font></p>     <p><font face="Verdana" size="2">Recibido: 21-01-10.    ]]></body>
<body><![CDATA[<br>Aceptado: 6-12-10</font></p>     <p><font face="Verdana" size="2"><u><i>Abreviaturas</u>. CNS: central nervous system. ERD: enfermedad de Rosai-Dorfman. EEG: electroencefalograma. FAE: f&aacute;rmacos antiepil&eacute;pticos. HCL: histiocitosis de c&eacute;lulas de Langerhans. HSLM: histiocitosis sinusal con linfadenopat&iacute;as masivas. MRI: magnetic resonance imaging. RM: resonancia magn&eacute;tica. SNC: sistema nervioso central. VSG: velocidad de sedimentaci&oacute;n globular.</i></font></p>      ]]></body><back>
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