<?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>0121-8123</journal-id>
<journal-title><![CDATA[Revista Colombiana de Reumatología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.Colomb.Reumatol.]]></abbrev-journal-title>
<issn>0121-8123</issn>
<publisher>
<publisher-name><![CDATA[Asociación Colombiana de Reumatología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0121-81232009000200003</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Vasculitis linfomonocítica primaria de inicio tardío, estrictamente de nervio periférico]]></article-title>
<article-title xml:lang="en"><![CDATA[Primary Lymphocytic Vasculitis of late onset, Limited to the Peripheral Nerve]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Restrepo]]></surname>
<given-names><![CDATA[José Félix]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rondón H]]></surname>
<given-names><![CDATA[Federico]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Colegial G]]></surname>
<given-names><![CDATA[Carlos H]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quintana L]]></surname>
<given-names><![CDATA[Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Iglesias-Gamarra]]></surname>
<given-names><![CDATA[Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Nacional de Colombia Facultad de Medicina Unidad Académica de Reumatología]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad Nacional de Colombia Facultad de Medicina Unidad Académica de Patología]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2009</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2009</year>
</pub-date>
<volume>16</volume>
<numero>2</numero>
<fpage>138</fpage>
<lpage>145</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0121-81232009000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0121-81232009000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0121-81232009000200003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[En este artículo presentamos los hallazgos de vasculitis estrictamente de nervio periférico en seis pacientes. Los hallazgos corresponden a una vasculitis que ocasiona una polineuropatía sensitivo-distal en guantes y medias cuyo infiltrado es de tipo linfo-monocítico, ausencia de necrosis fibrinoide, con un buen pronóstico, pocas recaídas y buena respuesta al tratamiento. Planteamos que esta patología debe tenerse en cuenta en el diagnóstico diferencial de las polineuropatías y mononeuritis múltiple. Se hace una revisión de la literatura.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[We present the finding of strictly peripheral nerve vascultis in six cases. The finding are secondary to a vasculitis that produce a stocking-glove sensitive-motor polyneuropathy, with an limphomonocytic infiltrate, absence of fibrinoid necrosis, good prognosis, low recurrences and an excellent response to treatment. We propose that this condition should be considered in the differential diagnosis of polyneuropathies and multiplex mononeuritis. A literature review is made.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[vasculitis]]></kwd>
<kwd lng="es"><![CDATA[neuropatía periférica]]></kwd>
<kwd lng="en"><![CDATA[vasculitis]]></kwd>
<kwd lng="en"><![CDATA[peripheral neuropathy]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p><font size=2 face=verdana>INVESTIGACI&Oacute;N ORIGINAL</font></p>      <p>    <center><font size=4 face="verdana"><b>Vasculitis linfomonoc&iacute;tica primaria de inicio tard&iacute;o, estrictamente de nervio perif&eacute;rico</b></font></p>      <p><font size=4 face="verdana"><b>Primary Lymphocytic Vasculitis of late onset, Limited to the Peripheral Nerve</b></font></p>      <p><font size=2 face=verdana>Jos&eacute; F&eacute;lix Restrepo<sup>1</sup>, Federico Rond&oacute;n H.<sup>1</sup>, Carlos H. Colegial G.<sup>2</sup>, Gerardo Quintana L.<sup>1</sup>, Antonio Iglesias-Gamarra<sup>1</sup></center></p>      <p><sup>1</sup> Facultad de Medicina. Unidad Acad&eacute;mica de Reumatolog&iacute;a. Universidad Nacional de Colombia.    <br> <sup>2</sup> Facultad de Medicina. Unidad Acad&eacute;mica de Patolog&iacute;a. Universidad Nacional de Colombia.</font></p>      <p><font face="verdana" size="2">Recibido: Febrero 20 de 2009 Aceptado: Mayo 29 de 2009</font></p>  <hr>  <font size=3 face="verdana">      <p><b>Resumen</b></p>      <p>En este art&iacute;culo presentamos los hallazgos de vasculitis estrictamente de nervio perif&eacute;rico en seis pacientes. Los hallazgos corresponden a una vasculitis que ocasiona una polineuropat&iacute;a sensitivo-distal en guantes y medias cuyo infiltrado es de tipo linfo-monoc&iacute;tico, ausencia de necrosis fibrinoide, con un buen pron&oacute;stico, pocas reca&iacute;das y buena respuesta al tratamiento. Planteamos que esta patolog&iacute;a debe tenerse en cuenta en el diagn&oacute;stico diferencial de las polineuropat&iacute;as y mononeuritis m&uacute;ltiple. Se hace una revisi&oacute;n de la literatura.</p>      ]]></body>
<body><![CDATA[<p><b>Palabras clave</b>: vasculitis, neuropat&iacute;a perif&eacute;rica.</p>      <p><b>Summary</b></p>      <p>We present the finding of strictly peripheral nerve vascultis in six cases. The finding are secondary to a vasculitis that produce a stocking-glove sensitive-motor polyneuropathy, with an limphomonocytic infiltrate, absence of fibrinoid necrosis, good prognosis, low recurrences and an excellent response to treatment. We propose that this condition should be considered in the differential diagnosis of polyneuropathies and multiplex mononeuritis. A literature review is made.</p>      <p><b>Key words</b>: vasculitis, peripheral neuropathy.</p>  <hr>      <p>Las vasculitis sist&eacute;micas constituyen un grupo heterog&eacute;neo de cuadros cl&iacute;nicos, caracterizados por inflamaci&oacute;n y da&ntilde;o (necrosis o trombosis) de los vasos sangu&iacute;neos (v&eacute;nulas, capilares, arteriolas y arterias de mediano y gran calibre), produciendo las manifestaciones cl&iacute;nicas de acuerdo a la regi&oacute;n irrigada<sup>1</sup>.</p>      <p>Las neuropat&iacute;as perif&eacute;ricas se han asociado a la presencia vasculitis hasta en un 75% de los casos, en algunas series estudiadas<sup>2</sup>. La mononeuritis m&uacute;ltiple o las poli-neuropat&iacute;as sensitivo-motoras (PN-SM) de tipo distal suelen ser la expresi&oacute;n cl&iacute;nica en la mayor&iacute;a de de estas enfermedades, confundiendo al cl&iacute;nico en su diagn&oacute;stico.</sup>      <p>Desde el punto de vista hist&oacute;rico, estas polineuropat&iacute;as han tenido varios intentos clasificatorios: Kr&uuml;cke<sup>3</sup> en 1955, en un primer intento, rescata las consideraciones ya informadas desde 1886 por Dumeril y Eichhort y las describe como poli-neuropat&iacute;as de car&aacute;cter recurrente.</p>      <p>Dyck y cols.<sup>4</sup>, de la cl&iacute;nica Mayo estudian a 53 pacientes con diagn&oacute;stico de polineuropat&iacute;a inflamatoria cr&oacute;nica que ten&iacute;an un promedio de evoluci&oacute;n de 7,5 a&ntilde;os y al observar la histopatolog&iacute;a del nervio sural de estos pacientes notaron un infiltrado de c&eacute;lulas mononucleares lo cual suger&iacute;a un proceso inflamatorio. Por tal raz&oacute;n se utilizaron corticoesteroides, obteniendo una mejor&iacute;a en el 39% de los pacientes, ning&uacute;n efecto favorable en el 47% y en el 14% de los pacientes se present&oacute; un deterioro progresivo. Posteriormente se pudo concluir que estos pacientes no ten&iacute;an vasculitis sino un proceso inflamatorio cr&oacute;nico.</sup>      <p>A partir del estudio de Said y cols.<sup>5</sup> se plante&oacute; la polineuropat&iacute;a asim&eacute;trica con compromiso muscular, que confirmaron posteriormente Davies y cols. en 1996<sup>6</sup> , Collins y cols. en el 2003<sup>7</sup> y Kararizou y cols. en el 2005<sup>8</sup>.</p>      <p>Desde 1992 hemos estado interesados en este tipo de patolog&iacute;a. En ese a&ntilde;o estudiamos 21 pacientes con vasculitis de nervio perif&eacute;rico; 19 de estos pacientes ten&iacute;an asociada alguna enfermedad reum&aacute;tica, uno con lepra y un caso de una paciente con vasculitis aislada estrictamente de nervio perif&eacute;rico, caso que nos llam&oacute; la atenci&oacute;n y nos llev&oacute; a estudiar y revisar en estos &uacute;ltimos 12 a&ntilde;os, los casos sobre prevalencia de vasculitis necrotizante en nervio perif&eacute;rico. De este protocolo de estudio seleccionamos seis pacientes, a quienes se les demostr&oacute; una polineuropat&iacute;a sensitivo- motora, con degeneraci&oacute;n axonal y miel&iacute;nica, no asociada a ninguna otra enfermedad, como enfermedad del tejido conjuntivo, metab&oacute;lica, t&oacute;xica, degenerativa, infiltrativa e infecciosa.</p>      ]]></body>
<body><![CDATA[<p>La neuropat&iacute;a ten&iacute;a la caracter&iacute;stica de ser de tipo distal, cuyo inicio y presentaci&oacute;n de los s&iacute;ntomas era en guantes y medias y en el estudio histopatol&oacute;gico se observaron varios focos de un infiltrado linfo-monocitario que compromet&iacute;a los vasos del perineuro. Creemos que este tipo de angiopat&iacute;a necrotizante de tipo linfo-monoc&iacute;tica constituye una vasculitis estricta y aislada en el nivel del nervio perif&eacute;rico.</p>      <p>Los objetivos del presente trabajo son: informar la presencia de una vasculitis primaria estrictamente de nervio perif&eacute;rico, que se inicia en forma de guantes y medias; analizar la evoluci&oacute;n cl&iacute;nica de la misma; correlacionar con otros hallazgos paracl&iacute;nicos; y discutir sobre el tema propuesto.</p>      <p><b>Materiales y m&eacute;todos</b></p>      <p>Se estudiaron en forma prospectiva a partir de enero de 1993, en el Hospital San Juan de Dios de Bogot&aacute;, en la Cl&iacute;nica de Fractura de Barranquilla y a partir del a&ntilde;o 2000 al 2004 en la Cl&iacute;nica Carlos Lleras del I.S.S. de Bogot&aacute;, todos los pacientes que consultaron por s&iacute;ntomas y signos de polineuropat&iacute;a o que presentaran a la electromiograf&iacute;a: mononeuritis m&uacute;ltiple o polineuropat&iacute;a sensitivo-motor de tipo distal, que suger&iacute;an vasculitis primaria, secundaria o una vasculitis que comprometiera estrictamente al nervio perif&eacute;rico. Se excluyeron las neuropat&iacute;as desmielinizantes. Se estudiaron un total de 110 pacientes a los cuales se les realiz&oacute; biopsia de nervio sural.</p>      <p>Se utilizaron las siguientes definiciones en el diagn&oacute;stico de angiopat&iacute;a necrosante del sistema nervioso perif&eacute;rico:</p>  <ol>      <li>Necrosis segmentaria de la pared de los vasos del perineuro.</li>      <li>Infiltraci&oacute;n de c&eacute;lulas inflamatorias, a nivel transneural de los vasos del perineuro.</li>      <li>Dep&oacute;sito de fibrina y/o trombosis a nivel de los vasos del perineuro, en algunos casos dep&oacute;sitos de hemosiderina.</li>      <li>Recanalizaci&oacute;n de los vasos.</li>      <li>La presencia de trombosis y/o recanalizaci&oacute;n en el mismo corte histol&oacute;gico.</li>    ]]></body>
<body><![CDATA[</ol>      <p>A todos los pacientes se les realiz&oacute; evaluaci&oacute;n electrodiagn&oacute;stica que inclu&iacute;a estudios de conducci&oacute;n nerviosa motora y sensitiva, respuesta tard&iacute;a (respuesta F y reflejo H) y electromiograf&iacute;a de aguja.</p>      <p>La polineuropat&iacute;a se consider&oacute; de acuerdo al electrodiagn&oacute;stico como: 1. Degeneraci&oacute;n axonal con desmielinizaci&oacute;n secundaria; 2. Desmielinizaci&oacute;n segmentaria con predominio motor o sensitivo; y 3. Mononeuritis m&uacute;ltiple de acuerdo a los estudios de Donofrio y Albers<sup>9</sup>.</p>      <p>La mononeuritis m&uacute;ltiple se defini&oacute; como: lesi&oacute;n aguda y subaguda sensitivo-motora asim&eacute;trica, que compromete los nervios perif&eacute;ricos, diferentes segmentos de compromisos del mismo nervio en los nervios opuestos, diferente grado de lesi&oacute;n del mismo segmento de los nervios en el mismo miembro, denervaci&oacute;n proximal mayor que la distal, denervaci&oacute;n de los miembros superiores mayor que en los miembros inferiores, denervaci&oacute;n radicular.</p>      <p>La polineuropat&iacute;a se defini&oacute; como compromiso sensitivo-motor de car&aacute;cter sim&eacute;trico o asim&eacute;trico y distal en guantes y medias, con d&eacute;ficit motor o sin este.</p>      <p>A todos los pacientes, adem&aacute;s, se les practic&oacute; cuadro hem&aacute;tico, sedimentaci&oacute;n globular por el m&eacute;todo de Westergren, prote&iacute;na C reactiva, determinaci&oacute;n del factor reumatoide, anticuerpos antinucleares, anti DNA, anti RNP, anti-Ro anti-Sm y anti- La, C-ANCA, P-ANCA, CPK, marcadores biol&oacute;gicos para hepatitis B y C, electroforesis de prote&iacute;nas, complemento C3 y C4, glicemia, colesterol total y diferencial, triglic&eacute;ridos, funci&oacute;n renal completa, transaminasas y radiograf&iacute;a de t&oacute;rax.</p>      <p><b>Resultados</b></p>      <p>Desde enero de 1993 hasta diciembre de 2004, de 110 biopsias de nervio sural practicadas, solo seis pacientes ten&iacute;an vasculitis estrictamente de nervio perif&eacute;rico con evidencia electrodiagn&oacute;stica de polineuropat&iacute;a sensitivomotora de car&aacute;cter sim&eacute;trico y distal en guantes y medias, con d&eacute;ficit motor (cinco casos) o mononeuritis m&uacute;ltiple (un caso). El rango de edad al inicio de los s&iacute;ntomas oscil&oacute; entre 56 y 73 a&ntilde;os, con un promedio de (64,8 a&ntilde;os). Todos los seis pacientes de sexo femenino. Ninguno reun&iacute;a criterios diagn&oacute;sticos para otras enfermedades del tejido conectivo como lupus eritematoso sist&eacute;mico, artritis reumatoide, enfermedad mixta del tejido conjuntivo, s&iacute;ndrome de Sjögren primario, esclerosis sist&eacute;mica progresiva, como tampoco para vasculitis primaria tipo PAN, poliange&iacute;tis microsc&oacute;pica, enfermedad de Churg-Strauss de acuerdo a los nuevos criterios de la A.C.R. (American College of Rheumatology)<sup>10-20</sup>.</p>      <p><b>Evoluci&oacute;n de la enfermedad</b></p>      <p>En todos los seis casos, el diagn&oacute;stico se hizo en forma bastante tard&iacute;a, y oscil&oacute; entre los 18 meses y los 38 meses de haberse iniciado los s&iacute;ntomas. Al inicio de la enfermedad, los pacientes consultaron por parestesias, disestesias o adormecimiento de las manos y pies, debilidad muscular de miembros inferiores de car&aacute;cter sim&eacute;trico; los s&iacute;ntomas no eran acentuados, lo cual llev&oacute; a confundir el diagn&oacute;stico con s&iacute;ndromes de atrapamiento de miembros superiores e inferiores, como tambi&eacute;n con el inicio de una enfermedad muscular inflamatoria tipo DM_PM (casos 5-6). Despu&eacute;s de tres a seis meses de evoluci&oacute;n de los s&iacute;ntomas el compromiso neurol&oacute;gico fue m&aacute;s severo con aumento del dolor.</p>      ]]></body>
<body><![CDATA[<p>En una segunda fase, los pacientes presentaron disminuci&oacute;n de la fuerza de prensi&oacute;n y d&eacute;ficit motor en manos y pies; se plante&oacute; la posibilidad de una polineuropat&iacute;a; en ese momento es cuando se solicitan los estudios electrodiagn&oacute;sticos y de electromiograf&iacute;a (<a href="#tab1">Tabla No. 1</a>).</p>      <p>    <center><a name="tab1"><img src="C:/SciELO/serial/rcre/v16n2/img/v16n2a02t1.jpg"></center></p>      <p><b>Tiempo de evoluci&oacute;n de la enfermedad</b></p>      <p>La evoluci&oacute;n promedio en meses, desde el comienzo de los s&iacute;ntomas, hasta el electrodiagn&oacute;stico de los cinco pacientes con polineuropat&iacute;a sensitivo-axomiel&iacute;nica, fue de 22,4 meses, y en el caso de la mononeuritis m&uacute;ltiple fue de 18 meses; el tiempo transcurrido entre los estudios electrodiagn&oacute;sticos y la biopsia de los nervios surales de los seis pacientes oscil&oacute; entre los 45 y 60 d&iacute;as. El resultado de la biopsia del nervio sural en todos los seis pacientes fue compatible con un infiltrado compuesto por monocitos/macr&oacute;fagos y linfocitos especialmente en el nivel de las arteriolas y vasos de peque&ntilde;o calibre; es decir, una vasculitis linfo-monoc&iacute;tica estrictamente a nivel del perineuro de los nervios perif&eacute;ricos El promedio de seguimiento posterior al diagn&oacute;stico fue de cuatro a&ntilde;os, con un m&iacute;nimo de 2,7 a&ntilde;os y un m&aacute;ximo de 8 a&ntilde;os, tiempo durante el cual no se observ&oacute; ninguna manifestaci&oacute;n que hiciera pensar en compromiso sist&eacute;mico (<a href="#fig1-4">Figuras 1-4</a>).</p>      <p>    <center><a name="fig1-4"><img src="C:/SciELO/serial/rcre/v16n2/img/v16n2a03f1-4.jpg"></center></p>      <p>El an&aacute;lisis de los resultados de laboratorio mostr&oacute; en todos los pacientes un incremento de la sedimentaci&oacute;n globular (V.S.G.) que oscil&oacute; entre los 30 y 40 mm/ hora (promedio 34 mm). Los niveles de ANAS encontrados en algunos pacientes no fueron significativos cl&iacute;nicamente; los ENAS (Ro, La, Sm y RNP), el factor reumatoide, P y CAncas, la electroforesis de prote&iacute;nas, el complemento y marcadores bioqu&iacute;micos para la hepatitis B y C fueron negativos.</p>      <p><b>Nervios comprometidos</b></p>      <p>En los estudios electrofisiol&oacute;gicos se encontr&oacute; afecci&oacute;n de los siguientes nervios en orden de frecuencia: ci&aacute;tico popl&iacute;teo externo, ci&aacute;tico popl&iacute;teo interno, sural, mediano y cubital. En el caso con mononeuritis m&uacute;ltiple se observ&oacute; pie ca&iacute;do de la pierna izquierda.</p>      ]]></body>
<body><![CDATA[<p>Se observ&oacute; vasculitis linfomonoc&iacute;tica en todas las biopsias de nervio sural de las seis pacientes estudiadas. No se demostr&oacute; una vasculitis primaria, ni se logr&oacute; demostrar una asociaci&oacute;n a las diferentes enfermedades del col&aacute;geno, crioinmunoglobulinemia, hepatitis B y C, enfermedades por almacenamiento, enfermedades mieloproliferativas, t&oacute;xica y/o la neuropat&iacute;a desmielinizante inflamatoria cr&oacute;nica, por lo que concluimos que las seis pacientes ten&iacute;an un cuadro cl&iacute;nico similar, con afecci&oacute;n de los nervios distales y que se conformaba un cuadro cl&iacute;nico y patol&oacute;gico de una vasculitis estrictamente de nervio perif&eacute;rico, de inicio tard&iacute;o e idiop&aacute;tico (<a href="#tab2">Tabla No. 2</a>).</p>      <p>    <center><a name="tab2"><img src="C:/SciELO/serial/rcre/v16n2/img/v16n2a02t2.jpg"></center></p>      <p><b>Tratamiento</b></p>      <p>Todas las pacientes recibieron tratamiento con glucocorticoides a una dosis de 0,5 a 1 miligramo (Kg. / d&iacute;a), hasta el control de la sintomatolog&iacute;a, asociado con azatioprina (IMURAN &reg;) 100 mg./ d&iacute;a; a los pacientes 5 y 6 fue necesario agregar bolos de ciclofosfamida (500 mg/mensual) durante un a&ntilde;o por la gravedad y evoluci&oacute;n de los s&iacute;ntomas.</p>      <p>Cinco de los pacientes evolucionaron satisfactoriamente con remisi&oacute;n de los s&iacute;ntomas y sin secuelas neurol&oacute;gicas al t&eacute;rmino de los seis meses de iniciado el tratamiento, menos el paciente 5 en la cual su evoluci&oacute;n fue t&oacute;rpida con secuelas neurol&oacute;gicas.</p>      <p><b>Discusi&oacute;n</b></p>      <p>Ha sido dif&iacute;cil de establecer tanto los primeros informes sobre vasculitis neurop&aacute;tica asociada a un evento secundario (como enfermedades del tejido conjuntivo, neoplasias, infecciones, t&oacute;xico, metab&oacute;lico o por dep&oacute;sito), como la forma aislada que afecta estrictamente al sistema nervioso perif&eacute;rico, porque los investigadores en la mayor&iacute;a de sus publicaciones no fueron expl&iacute;citos en sus hallazgos.</p>      <p>Tan solo en las d&eacute;cadas de los setenta y noventa se logr&oacute; establecer la asociaci&oacute;n con enfermedades del tejido conjuntivo, vasculitis, diabetes, infecciones u otras patolog&iacute;as.</p>      <p>Wees y Cols.<sup>21</sup> en 1981, estudiaron 17 biopsias de nervio sural (11 con PAN, cinco con AR y una con LEG) y propusieron tres tipos de lesiones: tipo I (vasculitis activa) en la cual se encuentra una infiltraci&oacute;n intraneural y perivascular de c&eacute;lulas inflamatorias con necrosis de la pared del vaso; tipo II en aquellos casos con cicatrizaci&oacute;n fibrosa y engrosamiento intraneural de la pared del vaso con un m&iacute;nimo infiltrado perivascular de c&eacute;lulas inflamatorias; tipo III, cuando se encuentra una degeneraci&oacute;n axonal y destrucci&oacute;n de la mielina asociada a un infiltrado perivascular de c&eacute;lulas inflamatorias.</p>      ]]></body>
<body><![CDATA[<p>En los &uacute;ltimos a&ntilde;os<sup>22-45</sup> se han informado varias series de pocos pacientes, donde se describe el compromiso del nervio perif&eacute;rico, con polineuropat&iacute;as sim&eacute;tricas y asim&eacute;tricas, pero solo hasta el a&ntilde;o 2003 en un art&iacute;culo realizado por Collins y cols.<sup>8</sup> de la universidad de Ohio informan sobre una cohorte de 48 pacientes con una polineuropat&iacute;a sensitivo-motora de tipo distal, 98% de los cuales ten&iacute;an una polineuropat&iacute;a de tipo asim&eacute;trico y 54% de los mismos ten&iacute;an compromiso de nervio perif&eacute;rico y m&uacute;sculos. En esta cohorte la inclusi&oacute;n de los pacientes se realiz&oacute; de acuerdo al concepto de Dyck de neuropat&iacute;a vascul&iacute;tica no sist&eacute;mica<sup>46</sup>. En el 2005 Kararizou y cols.<sup>9</sup> de Grecia, al estudiar 700 biopsias del nervio sural, describen 22 pacientes con neuropat&iacute;a vascul&iacute;tica no sist&eacute;mica de los cuales el 41% ten&iacute;an un compromiso sim&eacute;trico y algunas formas asim&eacute;tricas. Encontraron dep&oacute;sito de inmunoglobulinas en 18 de 22 pacientes y complemento C3 en 17 de 22 pacientes. Nos llama la atenci&oacute;n que la sedimentaci&oacute;n globular se encontr&oacute; elevada en el 53% en la serie de Dyck de 1987<sup>48</sup> en el 59% de la serie de Said y cols.<sup>5</sup>, el 63% de la serie de Davies y cols.<sup>6</sup>, en el 65% de la serie de Collins<sup>7</sup> y en cuatro de los 22 pacientes de la serie de Kararizou<sup>8</sup>. En nuestra cohorte la velocidad de sedimentaci&oacute;n encontrada fue m&aacute;s baja, con promedio de 34 mm/hora.</p>      <p>De los 11 pacientes descritos en 1992 por nosotros<sup>1</sup>, una paciente ten&iacute;a compromiso de nervio perif&eacute;rico, sin ninguna vasculitis primaria, secundaria u otra patolog&iacute;a mencionada previamente. Esta paciente nos sirvi&oacute; como caso &iacute;ndice, ya que hemos logrado observarlo por ocho a&ntilde;os y siempre sus quejas estuvieron relacionadas con parestesias en guantes y medias. Los otros cinco nuevos pacientes tuvieron el mismo patr&oacute;n de comportamiento, caracterizado por una etapa inicial de una sintomatolog&iacute;a bizarra asociada a parestesias, disestesias y adormecimiento de las manos y pies de car&aacute;cter sim&eacute;trico. En la segunda etapa de su evoluci&oacute;n cl&iacute;nica notaron un dolor asociado a parestesias a nivel de manos y pies, motivo por el cual consultaron. Finalmente, despu&eacute;s de esta segunda fase, los pacientes notaron disminuci&oacute;n de fuerza de prensi&oacute;n y d&eacute;ficit motor en manos y pies; la paciente 5 tuvo una evoluci&oacute;n m&aacute;s t&oacute;rpida ya que present&oacute; una mononeuritis m&uacute;ltiple que la ha incapacitado. Todos los pacientes recibieron tratamientos con esteroides a una dosis moderada y azatioprina con una buena respuesta cl&iacute;nica, excepto la quinta y sexta paciente que ha recibido bolos de ciclofosfamida, por evoluci&oacute;n cl&iacute;nica t&oacute;rpida. La sexta, al cabo de un a&ntilde;o de seguimiento, est&aacute; asintom&aacute;tica y sin secuelas neurol&oacute;gicas.</p>      <p>El patr&oacute;n histol&oacute;gico en las seis pacientes se caracteriz&oacute; por un infiltrado linfomonocitario que puede ser leve, moderado o severo y se observ&oacute; un engrosamiento endotelial importante. La evoluci&oacute;n cl&iacute;nica de estos seis pacientes es similar: ning&uacute;n compromiso sist&eacute;mico, casi ninguna alteraci&oacute;n de laboratorio y los hallazgos histopatol&oacute;gicos se caracterizan por conformar un patr&oacute;n celular de tipo linfo-monoc&iacute;tico que comprometen las peque&ntilde;as arteriolas de los vasos- nervorum de los nervios perif&eacute;ricos distales de manos y pies, ausencia de polimorfo nucleares; este tipo de comportamiento despu&eacute;s de varios a&ntilde;os de evoluci&oacute;n y con ausencia de un compromiso sist&eacute;mico conforma una vasculitis de tipo primario de inicio tard&iacute;o y estrictamente de nervio perif&eacute;rico y de tipo linfo-monoc&iacute;tico, con una respuesta adecuada a los inmunosupresores convencionales.</p>      <p>Finalmente, creemos que as&iacute; como existe la ange&iacute;tis primaria del sistema nervioso central, entidad descrita inicialmente por Cravioto y Feign en 1959<sup>47</sup> y posteriormente documentada por Cupps y cols.<sup>48</sup> en 1983, y por los estudios cl&aacute;sicos de Calabrese y cols.<sup>49</sup>, tambi&eacute;n existe la ange&iacute;tis primaria del sistema nervioso perif&eacute;rico, que de acuerdo a las diferentes publicaciones planteamos que en la neuropat&iacute;a vascul&iacute;tica no sist&eacute;mica se pueden presentar dos tipos de compromisos: uno en el que existe una arteritis bien definida como la describe Collins y cols.<sup>8</sup>, en la cual existe una polineuropat&iacute;a asim&eacute;trica de tipo distal y en la que puede haber compromiso muscular con un curso m&aacute;s agresivo con reca&iacute;das hasta en un 38% de los casos, reactantes de fase aguda y que puede ocasionar mortalidad; y el otro, una polineuropat&iacute;a sensitivo-distal en guantes y medias cuyo infiltrado es de tipo linfomonoc&iacute;tico, ausencia de necrosis fibrinoide, de mejor pron&oacute;stico, con pocas reca&iacute;das y con buena respuesta al tratamiento, como lo acabamos de presentar en este art&iacute;culo.</p>  <hr>      <p><b>Referencias</b></p>      <!-- ref --><p>1. 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