<?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>0212-7199</journal-id>
<journal-title><![CDATA[Anales de Medicina Interna]]></journal-title>
<abbrev-journal-title><![CDATA[An. Med. Interna (Madrid)]]></abbrev-journal-title>
<issn>0212-7199</issn>
<publisher>
<publisher-name><![CDATA[Arán Ediciones, S. L.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0212-71992006000600013</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Macroglobulinemia de Waldenström]]></article-title>
<article-title xml:lang="en"><![CDATA[Waldenström's Macroglobulinemia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Khosravi Shahi]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castillo Rueda]]></surname>
<given-names><![CDATA[A. del]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Díaz Muñoz de la Espada]]></surname>
<given-names><![CDATA[V. M.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Hospital General Universitario Gregorio Marañón Servicio de Oncología Médica ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Hospital General Universitario Gregorio Marañón Servicio de Medicina Interna II ]]></institution>
<addr-line><![CDATA[Madrid ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2006</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2006</year>
</pub-date>
<volume>23</volume>
<numero>6</numero>
<fpage>291</fpage>
<lpage>293</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_arttext&amp;pid=S0212-71992006000600013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_abstract&amp;pid=S0212-71992006000600013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_pdf&amp;pid=S0212-71992006000600013&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[La macroglobulinemia de Waldenström es un trastorno linfoproliferativo de fenotipo B infrecuente, que se define por la presencia de infiltración de médula ósea por un linfoma linfoplasmocitoide, aunque en ocasiones se trata de un linfoma extramedular (ganglionar), asociado a una paraproteinemia IgM (monoclonal), que debe de diferenciarse de la gammapatía monoclonal de significado incierto y de los trastornos asociados a IgM. La supervivencia mediana de esta enfermedad es de unos 5 años. Los casos asintomáticos no requieren tratamiento. Para el tratamiento de la enfermedad sintomática se puede recurrir a los agentes alquilantes, a los análogos de purinas (fludarabina, cladribina) y al anticuerpo monoclonal anti-CD20 (rituximab). La plasmáferesis tiene su papel en el tratamiento del síndrome de hiperviscosidad, y de la neuropatía periférica asociados a la macroglobulinemia de Waldenström.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Waldenström’s macroglobulinemia is an uncommon B-cell lymphoproliferative disorder characterized by bone marrow infiltration of luymphoplasmatic lymphoma, although sometimes there is a extramedullary lymphoma (nodal), with demonstration of an IgM monoclonal gammopathy. It must be distinguished from monoclonal gammopathy of undetermined significance and IgM- related disorders. The median survival of patients with Waldenström’s macroglobulinemia averages 5 years. Asymptomatic cases should not be treated. Symtomatic cases could be treated with alkylating agents, nucleoside analogues (fludarabine or cladribine), and the monoclonal antibody rituximab. For the managment of hyperviscosity and neuropathies plasmapheresis could be used successfully.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Macroglobulinemia]]></kwd>
<kwd lng="es"><![CDATA[Waldenström]]></kwd>
<kwd lng="es"><![CDATA[Linfoma linfoplasmático]]></kwd>
<kwd lng="es"><![CDATA[IgM]]></kwd>
<kwd lng="es"><![CDATA[Hiperviscosidad]]></kwd>
<kwd lng="en"><![CDATA[Macroglobulinemia]]></kwd>
<kwd lng="en"><![CDATA[Waldenström]]></kwd>
<kwd lng="en"><![CDATA[Lymphoplasmatic lymphoma]]></kwd>
<kwd lng="en"><![CDATA[IgM]]></kwd>
<kwd lng="en"><![CDATA[Hyperviscosity]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p>&nbsp;</p>     <p>&nbsp;</p>     <p><font face="Verdana" size="4"><b><a name="top"></a>Macroglobulinemia de Waldenstr&ouml;m</b></font></p>     <p><font face="Verdana" size="4"><b>Waldenstr&ouml;m's Macroglobulinemia</b></font></p>     <p>&nbsp;</p>     <p>&nbsp;</p>     <p><font face="Verdana" size="2"><b>P. Khosravi Shahi, A. del Castillo Rueda<sup>1</sup>, V. M. D&iacute;az Mu&ntilde;oz de la Espada</b></font></p>     <p><font face="Verdana" size="2">Servicios de Oncolog&iacute;a M&eacute;dica y <sup>1</sup>Medicina Interna II. Hospital General Universitario Gregorio Mara&ntilde;&oacute;n. Madrid</font></p>     <p><font face="Verdana" size="2"><a href="#back">Dirección 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">   La macroglobulinemia de Waldenstr&ouml;m es un trastorno linfoproliferativo de fenotipo B infrecuente, que se define por la presencia de infiltraci&oacute;n de m&eacute;dula &oacute;sea por un linfoma linfoplasmocitoide, aunque en ocasiones se trata de un linfoma extramedular (ganglionar), asociado a una paraproteinemia IgM (monoclonal), que debe de diferenciarse de la gammapat&iacute;a monoclonal de significado incierto y de los trastornos asociados a IgM. La supervivencia mediana de esta enfermedad es de unos 5 a&ntilde;os. Los casos asintom&aacute;ticos no requieren tratamiento. Para el tratamiento de la enfermedad sintom&aacute;tica se puede recurrir a los agentes alquilantes, a los an&aacute;logos de purinas (fludarabina, cladribina) y al anticuerpo monoclonal anti-CD20 (rituximab). La plasm&aacute;feresis tiene su papel en el tratamiento del s&iacute;ndrome de hiperviscosidad, y de la neuropat&iacute;a perif&eacute;rica asociados a la macroglobulinemia de Waldenstr&ouml;m.</font></p>     <p><font face="Verdana" size="2"><b>Palabras clave:</b> Macroglobulinemia. Waldenstr&ouml;m. Linfoma linfoplasm&aacute;tico. IgM. Hiperviscosidad.</font></p> <hr size="1">     <p><font face="Verdana" size="2"><b>ABSTRACT</b></font></p>    <p>   <font face="Verdana" size="2">   Waldenstr&ouml;m&acute;s macroglobulinemia is an uncommon B-cell lymphoproliferative disorder characterized by bone marrow infiltration of luymphoplasmatic lymphoma, although sometimes there is a extramedullary lymphoma (nodal), with demonstration of an IgM monoclonal gammopathy. It must be distinguished from monoclonal gammopathy of undetermined significance and IgM- related disorders. The median survival of patients with Waldenstr&ouml;m&acute;s macroglobulinemia averages 5 years. Asymptomatic cases should not be treated. Symtomatic cases could be treated with alkylating agents, nucleoside analogues (fludarabine or cladribine), and the monoclonal antibody rituximab. For the managment of hyperviscosity and neuropathies plasmapheresis could be used successfully.</font></p>     <p><font face="Verdana" size="2"><b>Key words:</b> Macroglobulinemia. Waldenstr&ouml;m. Lymphoplasmatic lymphoma. IgM. Hyperviscosity.</font></p> <hr size="1">     <p>&nbsp;</p>     <p><font face="Verdana" size="3"><b>Introducción</b></font></p>     <p><font face="Verdana" size="2">La macroglobulinemia de Waldenstr&ouml;m (MW) es un s&iacute;ndrome linfoproliferativo cr&oacute;nico raro de fenotipo B. Esta enfermedad es m&aacute;s frecuente en varones que en mujeres (1). La MW es propia de edad media y avanzada, con una mediana de edad de 65 a&ntilde;os (2), y con una supervivencia mediana de 5 a&ntilde;os (3).</font></p>     ]]></body>
<body><![CDATA[<p>   <font face="Verdana" size="2">   La MW se define por la presencia de infiltraci&oacute;n medular por un linfoma linfoplasmocitoide (LLP) seg&uacute;n la clasificaci&oacute;n de OMS (4 y de la REAL, con patr&oacute;n predominantemente intertrabecular, y la presencia de una paraproteinemia IgM monoclonal de cualquier concentraci&oacute;n.</font></p>    <p>   <font face="Verdana" size="2">   Es por tanto una entidad cl&iacute;nico-anatomopatol&oacute;gica definida, que se debe de diferenciar de:</font></p>    <p>   <font face="Verdana" size="2">   1. Gammapat&iacute;a monoclonal de significado incierto tipo IgM (GMSI) (5): caracterizado por la presencia de una paraproteinemia monoclonal IgM (generalmente &lt; 3 g/dl), asintom&aacute;tico y por la ausencia de infiltraci&oacute;n medular por LLP. No requiere tratamiento, s&oacute;lo debe realizarse seguimiento cada 6 meses con hemograma, B-2-microglobulina(B2M), y determinaci&oacute;n de IgM s&eacute;rica.</font></p>    <p>   <font face="Verdana" size="2">   2. Trastornos asociados a IgM monoclonal: caracterizado por la presencia de una paraproteinemia IgM monoclonal sintom&aacute;tica (hiperviscosidad, neuropat&iacute;a perif&eacute;rica, etc.), en ausencia de infiltraci&oacute;n medular por LLP (6).</font></p>     <p>   &nbsp;</p>     <p><b><font face="Verdana" size="3">Clínica y diagnóstico</font></b></p>     <p><font face="Verdana" size="2">Las manifestaciones cl&iacute;nicas pueden ser muy variadas (1,2) tales como s&iacute;ntomas B (fiebre sin focalidad, p&eacute;rdida peso &gt; 10%, y sudoraci&oacute;n nocturna profusa), s&iacute;ntomas generales (mal estado general, astenia, anorexia), s&iacute;ndrome de hiperviscosidad (generalmente si el &iacute;ndice de viscosidad sangu&iacute;nea es mayor de 3-4), citopenias hematol&oacute;gicas, visceromegalias y/o adenopat&iacute;as, insuficiencia renal, amiloidosis, fen&oacute;menos autoinmunes (anemia hemol&iacute;tica por crioaglutininas), crioglobulinemias tipo I (raro) (7) y tipo II (m&aacute;s frecuente, con vasculitis sist&eacute;mica que puede afectar a ri&ntilde;ones, articulaciones, h&iacute;gado y piel), y neuropat&iacute;a perif&eacute;rica sensitivomotriz desmielinizante.</font></p>     <p><font face="Verdana" size="2">Los criterios diagn&oacute;sticos de la enfermedad se reflejan en la <a href="#t1"> tabla I</a>. Se considera como criterio imprescindible para el diagn&oacute;stico la presencia de un LLP seg&uacute;n la clasificaci&oacute;n de OMS y de la REAL (8) a nivel medular o en ocasiones a nivel extramedular. Se caracteriza por ser un linfoma no Hodgkin de linfocitos B peque&ntilde;os, con diferenciaci&oacute;n plasmocitoide/c&eacute;lulas plasm&aacute;ticas, con un inmunofenotipo caracter&iacute;stico (<a href="#t2">Tabla II</a>). Los casos donde casi la totalidad de las c&eacute;lulas neopl&aacute;sicas son c&eacute;lulas plasm&aacute;ticas (CD20-,CD138+, IgM intracitoplasm&aacute;tico +) se deben de considerar como mieloma m&uacute;ltiple IgM (9). No existen unas anomal&iacute;as cromos&oacute;micas o gen&eacute;ticas espec&iacute;ficas de la enfermedad (10,11).</font></p>     <p align="center"><font face="Verdana" size="2"><a name="t1"><img src="/img/revistas/ami/v23n6/revision_t1.jpg" width="336" height="202"></a></font></p>     <p align="center"><font face="Verdana" size="2">    ]]></body>
<body><![CDATA[<br> <a name="t2"><img src="/img/revistas/ami/v23n6/revision_t2.jpg" width="338" height="194"></a></font></p>     <p><font face="Verdana" size="2">Por tanto para el diagn&oacute;stico de MW es necesario realizar las pruebas diagn&oacute;sticas que figuran en la <a href="#t3"> tabla III</a>.</font></p>     <p align="center"><font face="Verdana" size="2"><a name="t3"><img src="/img/revistas/ami/v23n6/revision_t3.jpg" width="338" height="302"></a></font></p>     <p><b><font face="Verdana" size="3">Tratamiento</font></b></p>     <p><font face="Verdana" size="2">Los criterios que se consideran necesarios para iniciar el tratamiento son los siguientes (1,2):</font></p>     <p>   <font face="Verdana" size="2">   1. La GMSI y la MW asintom&aacute;tica (smoldering/indolente) no requieren tratamiento (12). S&oacute;lo se debe realizar seguimiento cada 3-6 meses, con exploraci&oacute;n f&iacute;sica (adenoapat&iacute;as, hepatoesplenomegalia), inmunoelectroforesis de sangre y orina de 24 horas, hemograma y bioqu&iacute;mica con B2M.</font></p>    <p>   <font face="Verdana" size="2">   2. En los casos de MW sintom&aacute;tico se requiere para iniciar el tratamiento alguno de los siguientes criterios (13):</font> </p>    <p> <font face="Verdana" size="2"> -Hemoglobina &lt;10 g/dl y/o plaquetas &lt; 100.000/ul debido a la infiltraci&oacute;n medular.</font></p>    <p> <font face="Verdana" size="2"> -S&iacute;ntomas generales o B.</font></p>    <p> <font face="Verdana" size="2"> -Crecimiento o s&iacute;ntomas por hepatoesplenomegalia y/o adenopat&iacute;as.</font></p>    ]]></body>
<body><![CDATA[<p> <font face="Verdana" size="2"> -Cualquier manifestaci&oacute;n asociada a MW: hiperviscosidad, insuficiencia renal, amiloidosis, crioglobulinemia o neuropat&iacute;a perif&eacute;rica.</font></p>    <p>   <font face="Verdana" size="2">   Entre los f&aacute;rmacos que se pueden emplear en el tratamiento de MW en primera l&iacute;nea destacan los alquilantes, los an&aacute;logos de nucle&oacute;sidos (14) y rituximab, sin que ninguno de ellos se pueda considerar de primera elecci&oacute;n.</font></p>    <p>   <font face="Verdana" size="2">   Los esquemas m&aacute;s empleados en primera l&iacute;nea de tratamiento son:</font> </p>    <p>   <font face="Verdana" size="2">   1. Monoterapia con alquilantes (clorambucil), an&aacute;logos de purinas (fludarabina y cladribina) (15,16) o rituximab. Si es necesario obtener una respuesta r&aacute;pida, parece que esto se consigue mejor con el empleo de los an&aacute;logos.</font></p>    <p>   <font face="Verdana" size="2">   Tras la administraci&oacute;n de rituximab puede producirse un aumento s&uacute;bito y transitorio de IgM, agravando la hiperviscosidad. Por tanto es necesario en estos casos vigilar estrechamente la aparici&oacute;n de signos y s&iacute;ntomas de hiperviscosidad.</font></p>    <p>   <font face="Verdana" size="2">   2. Poliquimioterapias con esquemas R-CVP (rituximab, ciclofosfamida, vincristina y prednisona), R-CHOP (rituximab, ciclofosfamida, adriamicina, vincristina y prednisona), rituximab-fludarabina, rituximab-fludarabina-ciclofosfamida y clorambucil-prednisona.</font></p>    <p>   <font face="Verdana" size="2">   En segunda l&iacute;nea de tratamiento se puede recurrir a las siguientes opciones:</font></p>    <p>   <font face="Verdana" size="2">   1. Quimioterapia de alta dosis y trasplante de m&eacute;dula &oacute;sea (TMO) aut&oacute;logo: en estos casos hay que evitar el uso masivo de agentes alquilantes y an&aacute;logos de purinas previo al TMO. El TMO alog&eacute;nico s&oacute;lo se debe de llevar a cabo en el seno de ensayos cl&iacute;nicos (17).</font></p>    <p>   <font face="Verdana" size="2">   2. Utilizar de nuevo el mismo esquema que en primera l&iacute;nea si la supervivencia libre de enfermedad desde la finalizaci&oacute;n del tratamiento es mayor a 1 a&ntilde;o.</font></p>    <p>   <font face="Verdana" size="2">   3. Cualquiera de los f&aacute;rmacos de primera l&iacute;nea no usado previamente.</font></p>    ]]></body>
<body><![CDATA[<p>   <font face="Verdana" size="2">   4. Otros f&aacute;rmacos: Talidomida sola o con dexametasona (18) y pulsos de dexametasona (19) (en especial si hay citopenias hematol&oacute;gicas).</font></p>    <p>   <font face="Verdana" size="2">   En caso de s&iacute;ndrome de hiperviscosidad se debe de recurrir a la plasm&aacute;feresis seguida de quimioterapia; y en los casos de neuropat&iacute;a perif&eacute;rica desmielinizante por IgM suele haber buena respuesta a plasm&aacute;feresis y rituximab. La crioglobulinemia responde bien a dosis altas de dexametasona. La esplenectom&iacute;a podr&iacute;a usarse si hay esplenomegalia masiva sintom&aacute;tica o hiperesplenismo (20,21).</font></p>     <p>   &nbsp;</p>     <p><b><font face="Verdana" size="3">Bibliografía</font></b></p>     <!-- ref --><p><font face="Verdana" size="2">1. Dimopoulos MA, Panayiotidis P, Moulopoulos LA Sfikakis P, Dalakas M. Waldenstr&ouml;m's macroglobulinemia: Clinical features, complications, and managment. J Clin Oncol 2000; 18: 214-26.</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=591792&pid=S0212-7199200600060001300001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> <font face="Verdana" size="2"> 2. Groves FD, Travis LB, Devesa SS, Ries LA, Fraumeni JF Jr. Waldenstr&ouml;m's macroglobulinemia: incidence patterns in the United States, 1988-1994. Cancer 1998; 82: 1078-83.</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=591793&pid=S0212-7199200600060001300002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> <font face="Verdana" size="2"> 3. Owen RG, Johnson SA, Morgan GJ. Waldenstr&ouml;m's macroglobulinemia: Laboratory diagnosis and treatment. Hematol Oncol 2000; 18: 41-9.</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=591794&pid=S0212-7199200600060001300003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> <font face="Verdana" size="2"> 4. Jaffe ES, Harris NL, Stein H. World Hearth Organization Classification of Tumours. 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<body><![CDATA[<br> Hospital General Universitario Gregorio Marañón.    <br> C/ Dr. Esquerdo, 46.    <br> 28007 Madrid.    <br> e-mail: <a href="mailto:drkhosravi@hotmail.com">drkhosravi@hotmail.com</a></font></p>     <p><font face="Verdana" size="2">Trabajo aceptado: 2 de febrero de 2006</font></p>      ]]></body><back>
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