<?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>S1130-14732007000100007</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Angioma cavernoso del segundo nervio craneal y apoplejía quiasmática]]></article-title>
<article-title xml:lang="en"><![CDATA[Cavernous angioma of the second cranial nerve and chiasmatic apoplexy]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos-Ditto]]></surname>
<given-names><![CDATA[R.A.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos-Franco]]></surname>
<given-names><![CDATA[J.A.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pinos-Gavilanes]]></surname>
<given-names><![CDATA[M.W.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Hospital Alcívar Servicio de Neurocirugía ]]></institution>
<addr-line><![CDATA[Guayaquil ]]></addr-line>
<country>Equador</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez Terapia endovascular neurológica ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2007</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2007</year>
</pub-date>
<volume>18</volume>
<numero>1</numero>
<fpage>47</fpage>
<lpage>51</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_arttext&amp;pid=S1130-14732007000100007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_abstract&amp;pid=S1130-14732007000100007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_pdf&amp;pid=S1130-14732007000100007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Presentamos el caso de una paciente que presentó un cuadro de apoplejía quiasmática asociada a alteraciones menstruales cuya tomografía computarizada de cráneo mostró hemorragia supraselar. Fue intervenida con el diagnostico de tumor hipofisiario, pero presentó una lesión hemorrágica en quiasma y la porción proximal del nervio óptico izquierdo. El diagnostico histopatológico fue de un cavernoma. El angioma cavernoso constituye cerca del 15% de todas las malformaciones vasculares del sistema nervioso central, y los del aparato visual son infrecuentes. Se debe sospechar cuando el paciente presenta apoplejía quiasmática u óptica. Su exéresis es útil para evitar empeoramiento o un nuevo déficit visual.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[We present the case of a female patient who developed chiasmatic apoplexy and menstrual alterations. CT scanning showed a suprasellar hemorrhage. She underwent surgery with the presumptive diagnosis of pituitary tumor. At surgery, we find a brown-grayish lesion involving left optic nerve and chiasm. Cavernous angioma was diagnosed by histopathology. Cavernous angiomas constitute nearly 15% of all central nervous system vascular malformations. Location at the optic pathway is very rare, but must to be ruled out in the diagnosis of a patient with chiasmatic and/or optic apoplexy. Surgery is useful in preventing worsening of the previous deficit or a new visual defect.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Angioma cavernoso]]></kwd>
<kwd lng="es"><![CDATA[Apoplejía quiasmática]]></kwd>
<kwd lng="es"><![CDATA[Nervio óptico]]></kwd>
<kwd lng="en"><![CDATA[Cavernous angioma]]></kwd>
<kwd lng="en"><![CDATA[Chiasmatic apoplexy]]></kwd>
<kwd lng="en"><![CDATA[Optic nerve]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <html> <head> <title>Angioma cavernoso del segundo nervio craneal y apoplej&iacute;a quiasm&aacute;tica</title> </head>     <p>&nbsp;</p>     <p>&nbsp;</p>     <p><font face="Verdana" size="4"><b><a name="top"></a>Angioma cavernoso del segundo nervio craneal y apoplej&iacute;a quiasm&aacute;tica</b></font></p>     <P><font face="Verdana" size="4"><b>Cavernous angioma of the second cranial nerve and chiasmatic apoplexy</b></font></p>     <P>&nbsp;</p>     <P>&nbsp;</p>     <P><font face="Verdana" size="2"><B>R.A. Santos-Ditto; J.A. Santos-Franco y M.W. Pinos-Gavilanes*</B></font></p>      <p><font face="Verdana" size="2">Servicio de Neurocirug&iacute;a. Hospital Alc&iacute;var. Guayaquil. Equador. *Terapia endovascular neurol&oacute;gica. Instituto Nacional de Neurolog&iacute;a y Neurocirug&iacute;a "Manuel Velasco Su&aacute;rez". M&eacute;xico.</font></p>     <p><font face="Verdana" size="2"><a href="#bajo">Dirección para correspondencia</a></font></p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p>     <p>&nbsp;</p><hr size="1">       <p><b><font face="Verdana" size="2">RESUMEN</font></b></p>      <p><font face="Verdana" size="2">Presentamos el caso de una paciente que present&oacute; un cuadro de apoplej&iacute;a quiasm&aacute;tica asociada a alteraciones menstruales cuya tomograf&iacute;a computarizada de cr&aacute;neo mostr&oacute; hemorragia supraselar. Fue intervenida con el diagnostico de tumor hipofisiario, pero present&oacute; una lesi&oacute;n hemorr&aacute;gica en quiasma y la porci&oacute;n proximal del nervio &oacute;ptico izquierdo. El diagnostico histopatol&oacute;gico fue de un cavernoma. El angioma cavernoso constituye cerca del 15% de todas las malformaciones vasculares del sistema nervioso central, y los del aparato visual son infrecuentes. Se debe sospechar cuando el paciente presenta apoplej&iacute;a quiasm&aacute;tica u &oacute;ptica. Su ex&eacute;resis es &uacute;til para evitar empeoramiento o un nuevo d&eacute;ficit visual.</font></p>      <p><font face="Verdana" size="2"><b>Palabras clave:</b> Angioma cavernoso. Apoplej&iacute;a quiasm&aacute;tica. Nervio &oacute;ptico.</font></p>  <hr size="1">      <p><font face="Verdana" size="2"><b>SUMMARY</b></font></p>      <p><font face="Verdana" size="2">We present the case of a female patient who developed chiasmatic apoplexy and menstrual alterations. CT scanning showed a suprasellar hemorrhage. She underwent surgery with the presumptive diagnosis of pituitary tumor. At surgery, we find a brown-grayish lesion involving left optic nerve and chiasm. Cavernous angioma was diagnosed by histopathology. Cavernous angiomas constitute nearly 15% of all central nervous system vascular malformations. Location at the optic pathway is very rare, but must to be ruled out in the diagnosis of a patient with chiasmatic and/or optic apoplexy. Surgery is useful in preventing worsening of the previous deficit or a new visual defect.</font></p>      <p><font face="Verdana" size="2"><B>Key words:</B> Cavernous angioma. Chiasmatic apoplexy. Optic nerve.</font></p>  <hr size="1">     <p>&nbsp;</p>      <p><font face="Verdana"><b>Introducci&oacute;n</b></font></p>      ]]></body>
<body><![CDATA[<p><font face="Verdana" size="2">Los angiomas cavernosos est&aacute;n incluidos dentro de la clasificaci&oacute;n de las malformaciones vasculares del sistema nervioso central <Sup>5,21,32</Sup>. Cerca del 80% est&aacute;n localizados en la regi&oacute;n supratentorial, mientras que la afecci&oacute;n de nervios craneales es rara, con menos de 60 casos reportados en la literatura mundial <Sup>1-6,7-17-20,22,24,26-32,35</Sup>. El involucro de la v&iacute;a visual es tambi&eacute;n infrecuente. En el presente art&iacute;culo describimos el caso de una paciente con un angioma cavernoso del quiasma que se present&oacute; como una apoplej&iacute;a quiasm&aacute;tica, una manifestaci&oacute;n cl&iacute;nica tambi&eacute;n infrecuente.</font></p>     <p>&nbsp;</p>     <p><font face="Verdana"><b>Caso cl&iacute;nico</b></font></p>      <p><font face="Verdana" size="2">Paciente femenino de 39 a&ntilde;os quien s&uacute;bitamente present&oacute; cefalea y disminuci&oacute;n de la agudeza visual en dos ocasiones. Ambos episodios remitieron espont&aacute;neamente, el primero con recuperaci&oacute;n "ad integrum", y el segundo con secuela visual. Adem&aacute;s, desarroll&oacute; alteraciones menstruales, por tal motivo visit&oacute; inicialmente a un endocrin&oacute;logo, quien la envi&oacute; a nuestro servicio neuroquir&uacute;rgico con la probabilidad de una apoplej&iacute;a hipofisiaria. Vimos a la paciente a los veinte d&iacute;as de iniciado su cuadro. La exploraci&oacute;n neurol&oacute;gica revel&oacute; una hemianopsia bitemporal con p&eacute;rdida de la visi&oacute;n central del ojo izquierdo, e importante atrofia papilar ipsilateral.</font></p>      <p><font face="Verdana" size="2">La tomograf&iacute;a computarizada de cr&aacute;neo mostr&oacute; una lesi&oacute;n supraselar hiperdensa sin muchas modificaciones al uso de material de contraste (<a href="#f1">figura  1</a>). La panangiograf&iacute;a cerebral fue normal. No se realiz&oacute; IRM en aquel momento porque el resonador de nuestra instituci&oacute;n se encontraba en mantenimiento. Pensamos inicialmente en un adenoma de hip&oacute;fisis que condicion&oacute; una apoplej&iacute;a hipofisiaria. Por lo tanto, la paciente fue sometida a procedimiento quir&uacute;rgico urgente mediante una craneotom&iacute;a frontotemporal para acceder a la regi&oacute;n selar y supraselar. Se hall&oacute; una lesi&oacute;n gris-marr&oacute;n con datos de sangrado en el &aacute;ngulo anterolateral izquierdo del quiasma &oacute;ptico, la que involucraba tambi&eacute;n al nervio &oacute;ptico ipsilateral. Esta lesi&oacute;n fue resecada en su totalidad mediante disecci&oacute;n microquir&uacute;rgica (<a href="#f2">figura 2</a>). El an&aacute;lisis histopatol&oacute;gico demostr&oacute; vasos sangu&iacute;neos dilatados con paredes delgadas, sin fibras musculares lisas y ning&uacute;n tipo de tejido neural o glial entre ellos.</font></p>     <p>&nbsp;</p>      <p align="center"><font face="Verdana" size="2"><a name="f1"><img src="/img/revistas/neuro/v18n1/7_1.jpg" width="314" height="265"></a>    <br> Figura 1. <i>TC de la regi&oacute;n selar en una vista coronal.     <br> Es notoria la presencia de una lesi&oacute;n hiperdensa (flecha).</i></font></p>     <p align="center">&nbsp;</p>      ]]></body>
<body><![CDATA[<p align="center"><font face="Verdana" size="2"><a name="f2"><img src="/img/revistas/neuro/v18n1/7_2.jpg" width="592" height="231"></a>    <br> Figura 2. Vista intraoperatoria del quiasma y nervios &oacute;pticos. A: Notamos una lesi&oacute;n (flecha) en      <br> el &aacute;ngulo anteroexterno izquierdo del quiasma con extensi&oacute;n al nervio &oacute;ptico izquierdo (punto).      <br> B: Despu&eacute;s de la ex&eacute;resis microquir&uacute;rgica (punta de flecha). El asterisco apunta al nervio &oacute;ptico derecho.</font></p>     <p align="center">&nbsp;</p>      <p><font face="Verdana" size="2">El postoperatorio se llev&oacute; sin complicaciones, y a tres a&ntilde;os de la cirug&iacute;a, su d&eacute;ficit campim&eacute;trico sigue siendo similar al preoperatorio.</font></p>     <p>&nbsp;</p>     <p><font face="Verdana"><b>Discusi&oacute;n</b></font></p>      <p><font face="Verdana" size="2">El angioma cavernoso es parte de la clasificaci&oacute;n de las malformaciones vasculares que afectan al SNC, junto a las malformaciones arterio-venosas, teleangiectasias capilares y angiomas venosos <Sup>5,21</Sup>. La incidencia del AC constituye entre el 10 y el 20% de todas las malformaciones vasculares, y de 0.3 a 0.5% de todas las lesiones del SNC <Sup>31</Sup>. Su localizaci&oacute;n es predominantemente intraparenquimatosa, sobre todo supratentorial, seguido en frecuencia por la fosa posterior y la m&eacute;dula espinal, respectivamente. Bajo el examen histopatol&oacute;gico, el AC presenta canales sinusoidales formados con capas simples de c&eacute;lulas endoteliales, y sus paredes se hallan separadas por una delgada capa de tejido fibroso con ausencia de tejido neural o glial entre los vasos que conforman la lesi&oacute;n5,16,21. La presi&oacute;n dentro de estas lesiones es baja.</font></p>      <p><font face="Verdana" size="2">La afecci&oacute;n de nervios craneales es rara. Hay 60 casos reportados en la literatura mundial, y cerca del 60% de ellos involucran al segundo par craneal en su trayectoria intracraneal <Sup>1-15,17-20,22,24,26-32,35</Sup>. El primer reporte de un paciente con un AC quiasm&aacute;tico fue realizado por Manz et al en 1979, y se trat&oacute; de un paciente masculino de 30 a&ntilde;os con disminuci&oacute;n progresiva de la agudeza visual acompa&ntilde;ada de escotomas bilaterales <Sup>8</Sup>. En nuestra revisi&oacute;n de la literatura hemos hallado 35 casos <Sup>1-15,17-20,22,24,26-32,35 </Sup>(<a href="#t1">Tabla 1</a>). En el an&aacute;lisis de los casos reportados, incluido el nuestro, observamos un predominio del sexo femenino sobre el masculino, 61% y 39%, respectivamente. El promedio de edad es de 32 a&ntilde;os con un rango muy amplio de 4 a 60 a&ntilde;os, sin embargo, su aparici&oacute;n en los extremos de la vida es rara. Las lesiones se localizaron solamente en el quiasma &oacute;ptico en 44% de lo casos, seguidos por lesiones conjuntas en el nervio &oacute;ptico y el quiasma en 39%, en el nervio &oacute;ptico, quiasma y cintilla &oacute;ptica en 8% de los casos, en el nervio &oacute;ptico solamente en 6%, y finalmente s&oacute;lo un caso con afecci&oacute;n del quiasma y la cintilla &oacute;ptica (3%).</font></p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p>      <p align="center"> <a name="t1"> <img src="/img/revistas/neuro/v18n1/7_t1.jpg" width="599" height="759"</p></a>       <p>&nbsp;</p>     <p><font face="Verdana" size="2">El diagnostico de AC del segundo nervio craneal se debe acompa&ntilde;ar de un alto grado de sospecha cl&iacute;nica <Sup>9</Sup>. El t&eacute;rmino apoplej&iacute;a quiasm&aacute;tica fue mencionado por primera vez por Maitland et al en 1982, en la descripci&oacute;n de 4 casos con hemorragia quiasm&aacute;tica debido a lesiones vasculares ocultas a la angiograf&iacute;a, sin embargo, no se hizo una descripci&oacute;n clara de si fueron ACs <Sup>19</Sup>. Reilly y Oatey utilizaron el t&eacute;rmino apoplej&iacute;a del nervio &oacute;ptico en 1986 en casos de hemorragia en el nervio &oacute;ptico ocasionadas por ruptura de malformaciones arteriovenosas <Sup>23</Sup>. La apoplej&iacute;a quiasm&aacute;tica consiste en el desarrollo s&uacute;bito de un d&eacute;ficit quiasm&aacute;tico que suele acompa&ntilde;arse de cefalea. Los ACs y las MAVs son las causas principales debido a hemorragia dentro del quiasma &oacute;ptico <Sup>9,18,23,26</Sup>. La etiolog&iacute;a no hemorr&aacute;gica es poco frecuente, como puede suceder en la enfermedad arterioescler&oacute;tica, infecciones mic&oacute;ticas o por micobacterias, tumores, e incluso m&aacute;s raro a&uacute;n en enfermedades desmielinizantes <Sup>25</Sup>. El diagnostico diferencial m&aacute;s importante debe hacerse con la apoplej&iacute;a hipofisiaria; sin embargo, en esta ultima patolog&iacute;a se encontrar&aacute;n m&aacute;s frecuentemente cambios en el perfil hormonal, una morfolog&iacute;a alterada de la silla turca, y la presencia casi invariablemente de una lesi&oacute;n en la regi&oacute;n selar (la que generalmente ser&aacute; un adenoma de hip&oacute;fisis), supraselar (como un craneofaringioma), o de planum esfenoidal (como en caso de un meningioma) <Sup>25,29</Sup>. Aproximadamente, 53% de los casos en la revisi&oacute;n de la literatura debutaron con el desarrollo de una apoplej&iacute;a quiasm&aacute;tico u &oacute;ptica, mientras que 47% presentaron un curso m&aacute;s bien subagudo o progresivo del deterioro visual <Sup>1-15,17-20,22,24,26-32,35</Sup>.</font></p>      <p><font face="Verdana" size="2">Los angiomas cavernosos se incluyen dentro del grupo de lesiones angiogr&aacute;ficamente ocultas del SNC <Sup>5,16,32</Sup>. Vanesfky et al determinaron que existe una incidencia de 71% de este grupo de lesiones, seguidas por lesiones mixtas (15%), MAVs trombosadas (8%), y malformaciones venosas trombosadas (8%) <Sup>34</Sup>. En el caso que aqu&iacute; presentamos, lamentablemente, no realizamos la IRM por presentar problemas t&eacute;cnicos el equipo, y por tratar de preservar la visi&oacute;n de la paciente preferimos evitar el tr&aacute;mite de traslado y operar inmediatamente a la paciente.</font></p>      <p><font face="Verdana" size="2">En la actualidad existe la tendencia de realizar la ex&eacute;resis quir&uacute;rgica de los cavernomas cuando estos han sangrado, temiendo al deterioro subsiguiente como principal indicador; sin embargo, este criterio es a&uacute;n controvertido para las lesiones del tallo encef&aacute;lico <Sup>16,32</Sup>. La microcirug&iacute;a inmediata es &oacute;ptima en casos de cavernomas que involucran aI segundo nervio craneal con la finalidad de realizar la descompresi&oacute;n del tracto visual y de realizar el diagnostico definitivo <Sup>1-15,17-20,22,24,26-32,35</Sup>. La meta debe ser la resecci&oacute;n total para alcanzar la mejor&iacute;a de la funci&oacute;n visual. En los casos revisados, observamos que el abordaje mas frecuentemente empleado fue la craneotom&iacute;a frontotemporal; sin embargo Deshmuck et al utilizaron el abordaje orbitozigom&aacute;tico en cuatro casos <Sup>7</Sup>, mientras que Paladino et al reportaron un caso tratado con un "keyhole" transciliar <Sup>24</Sup>; en ambos casos, los autores alcanzaron buenos resultados quir&uacute;rgicos. La cirug&iacute;a tard&iacute;a se ve acompa&ntilde;ada de una pobre o nula mejor&iacute;a de la funci&oacute;n visual, pero es &uacute;til en prevenir un empeoramiento del d&eacute;ficit previo o la aparici&oacute;n de uno nuevo. Con la finalidad de lograr una resecci&oacute;n microquir&uacute;rgica completa y adecuada sin lesionar m&aacute;s fibras de la v&iacute;a visual, el tejido glial debe ser tomado como una referencia lim&iacute;trofe, y los tejidos te&ntilde;idos por hemosiderina deber&aacute;n ser respetados <Sup>7,9</Sup>. Las resecciones parciales conllevan a un alto &iacute;ndice de sangrado recurrente <Sup>7</Sup>.</font></p>     <p>&nbsp;</p>     <p><font face="Verdana"><b>Conclusiones</b></font></p>      <p><font face="Verdana" size="2">A pesar de ser una patolog&iacute;a infrecuente, se debe descartar la presencia de un AC del segundo nervio craneal en casos de apoplej&iacute;a quiasm&aacute;tica u &oacute;ptica, o deterioro visual, debido a que debemos evitar su secuela funcional mediante un pronto tratamiento. El tratamiento es quir&uacute;rgico, con la resecci&oacute;n total de la lesi&oacute;n como objetivo.</font></p>     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p><font face="Verdana"><b>Bibliograf&iacute;a</b></font></p>     <!-- ref --><p><font face="Verdana" size="2">1. Arru&eacute;, P., Thorn-Kany, M., Vally, P., et al.: Cavernous hemangioma of the intracranial optic pathways: CT and MRI. J Comput Assist Tomogr 1999; 23: 357-361.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=3364709&pid=S1130-1473200700010000700001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p><font face="Verdana" size="2">2. Castel, J.P., Delorge-Kerdiles, C., Rivel, J.: Cavernous angioma of the optic chiasma. Neurochirurgie 1989; 35: 252- 256.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=3364710&pid=S1130-1473200700010000700002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p><font face="Verdana" size="2">3. Corboy, J.R., Galetta, S.L.: familial cavernous angiomas manifesting with an acute chiasmal syndrome. Am J Ophthalmol 1989; 21: 245-250.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=3364711&pid=S1130-1473200700010000700003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p><font face="Verdana" size="2">4. Christoforidis, G.A., Bourekas, E.C., Baujan, M., Drevelengas, A., Tzalonikou, M.. Neuroradiology case of the day. 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Warner, J.E., Rizzo, J.F. 3rd, Brown, E.W., Ogilvy, C.S.: Recurrent chiasmal apoplexy due to cavernous malformation. J Neuroophtalmol 1996; 16: 99-106.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=3364743&pid=S1130-1473200700010000700035&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><p>&nbsp;</p>     <p>&nbsp;</p>     <p><B> <font face="Verdana" size="2"><a href="#top"> <img border="0" src="/img/revistas/neuro/v18n1/seta.gif" width="15" height="17"></a><a name="bajo"></a></font></B><font face="Verdana" size="2"><B>Dirección para correspondencia</B>:    <BR>Roberto Antonio Santos Ditto.    ]]></body>
<body><![CDATA[<BR>Ca&ntilde;ar 609 y Coronel,    <BR> Torre M&eacute;dica 1, 2&ordm; Piso, consultorio No: 2.    <BR> Guayaquil. Ecuador.</font></p>  <font face="Verdana" size="2">      </body> </font>      <p><font face="Verdana" size="2">Recibido; 12-12-05.    <BR>Aceptado: 13-03-06</font></p>      <p><font face="Verdana" size="2"><u>Abreviaturas</u>. AC: angioma cavernoso. ACs: angiomas cavernosos. IRM: imagen por resonancia magn&eacute;tica. SNC: sistema nervioso central. MAV: malformaci&oacute;n arterio-venosa. MAVs: malformaciones arterio-venosas.</font></p>   </html>      ]]></body><back>
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