<?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>0016-3813</journal-id>
<journal-title><![CDATA[Gaceta médica de México]]></journal-title>
<abbrev-journal-title><![CDATA[Gac. Méd. Méx]]></abbrev-journal-title>
<issn>0016-3813</issn>
<publisher>
<publisher-name><![CDATA[Academia Nacional de Medicina de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0016-38132006000300011</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Enfermedad de Paget mamaria: comunicación de un caso y revisión de la literatura]]></article-title>
<article-title xml:lang="en"><![CDATA[Mammary Paget's disease: case report and review of the literature]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Káram-Orantes]]></surname>
<given-names><![CDATA[Marcia]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pichardo-Velázquez]]></surname>
<given-names><![CDATA[Patricia]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fonte-Avalos]]></surname>
<given-names><![CDATA[Verónica]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Toussaint-Caire]]></surname>
<given-names><![CDATA[Sonia]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortiz-Hidalgo]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vega-Memije]]></surname>
<given-names><![CDATA[Elisa]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A02">
<institution><![CDATA[,Hospital ABC Departamento de Anatomía Patología ]]></institution>
<addr-line><![CDATA[México D. F]]></addr-line>
<country>México</country>
</aff>
<aff id="A01">
<institution><![CDATA[,Hospital General Dr. Manuel Gea González Departamento de Dermatología ]]></institution>
<addr-line><![CDATA[México D.F]]></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>142</volume>
<numero>3</numero>
<fpage>243</fpage>
<lpage>246</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0016-38132006000300011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0016-38132006000300011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0016-38132006000300011&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[La enfermedad de Paget mamaria (EP) es una manifestación superficial de enfermedad maligna de la mama. Suele presentarse entre 1 y 3% de todos los cánceres de mama y afecta principalmente mujeres entre los 50 y 60 años de edad. La forma clínica clásica se manifiesta con una placa infiltrada unilateral con eritema, escamas y en etapas avanzadas secreción del pezón o retracción del mismo. Presentamos el caso de una paciente de 51 años quién presentó dermatosis localizada a pezón izquierdo constituida por una placa eritemato-escamosa con costras hemáticas, de ocho meses de evolución, con prurito leve. Se le realizó biopsia y se diagnosticó enfermedad de Paget con carcinoma intraductal.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Paget's disease of the nipple is a superficial manifestation of an underlying breast malignancy. It has been reported in 1-3% of all breast carcinomas. The peak incidence is between 50 and 60 years. Its clinical presentation includes an unilateral, erythematous, slightly infiltrated scaly plaque and nipple retraction. Sero-sanguineous discharge may be observed. We here report a 51 year old woman who had an eight month history of an eritematous-squamous plaque with hematic scabs in the left nipple, with mild pruritus. A biopsy was taken and the diagnosis confirmed Paget's disease and intraductal breast carcinoma.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Enfermedad de Paget mamaria]]></kwd>
<kwd lng="es"><![CDATA[células de Paget]]></kwd>
<kwd lng="es"><![CDATA[carcinoma intraductal mamario]]></kwd>
<kwd lng="en"><![CDATA[Mammary Paget's disease]]></kwd>
<kwd lng="en"><![CDATA[Paget's cells]]></kwd>
<kwd lng="en"><![CDATA[intraductal breast carcinoma]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Caso cl&iacute;nico</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>Enfermedad de Paget mamaria: comunicaci&oacute;n de un caso y revisi&oacute;n de la literatura</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="3"><b>Mammary Paget's disease: case report and review of the literature</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>Marcia K&aacute;ram&#150;Orantes,<sup>a</sup> Patricia Pichardo&#150;Vel&aacute;zquez,<sup>a</sup> Ver&oacute;nica Fonte&#150;Avalos,<sup>a</sup> Sonia Toussaint&#150;Caire,<sup>a</sup> Carlos Ortiz&#150;Hidalgo<sup>b</sup> y Elisa Vega&#150;Memije<sup>a</sup>*</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>a</sup> Departamento de Dermatolog&iacute;a, Hospital General Dr.Manuel Gea Gonz&aacute;lez, M&eacute;xico, D. F.</i></font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>b</sup> Departamento de Anatom&iacute;a Patolog&iacute;a, Hospital ABC, M&eacute;xico, D. F., M&eacute;xico</i></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Recibido en su versi&oacute;n modificada: 6 de enero de 2006    <br> Aceptado: 13 de enero de 2006</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>*Correspondencia y solicitud de sobretiros: </b>    <br>     <i>Dra. Mar&iacute;a Elisa Vega Memije,     <br>     Departamento de Dermatolog&iacute;a del Hospital General Dr. Manuel Gea Gonz&aacute;lez. Calzada de Tlalpan      4800, Delegaci&oacute;n Tlalpan, M&eacute;xico, D.F.     <br>     C. P. 14000.     <br>   Tel&eacute;fono y Fax 56657691. </i>    <br> Correo electr&oacute;nico: <a href="mailto:dra_elisa_vega@yahoo.com.mx">dra_elisa_vega@yahoo.com.mx</a>.</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2"><i>La enfermedad de Paget mamaria (EP) es una manifestaci&oacute;n superficial de enfermedad maligna de la mama. Suele presentarse entre 1 y 3% de todos los c&aacute;nceres de mama y afecta principalmente mujeres entre los 50 y 60 a&ntilde;os de edad. La forma cl&iacute;nica cl&aacute;sica se manifiesta con una placa infiltrada unilateral con eritema, escamas y en etapas avanzadas secreci&oacute;n del pez&oacute;n o retracci&oacute;n del mismo. Presentamos el caso de una paciente de 51 a&ntilde;os qui&eacute;n present&oacute; dermatosis localizada a pez&oacute;n izquierdo constituida por una placa eritemato&#150;escamosa con costras hem&aacute;ticas, de ocho meses de evoluci&oacute;n, con prurito leve. Se le realiz&oacute; biopsia y se diagnostic&oacute; enfermedad de Paget con carcinoma intraductal.</i></font></p>     <p align="justify"><font face="verdana" size="2"><b>Palabras clave:</b><i> Enfermedad de Paget mamaria, c&eacute;lulas de Paget, carcinoma intraductal mamario</i></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Summary</b></font></p>     <p align="justify"><font face="verdana" size="2"><i>Paget's disease of the nipple is a superficial manifestation of an underlying breast malignancy. It has been reported in 1&#150;3% of all breast carcinomas. The peak incidence is between 50 and 60 years. Its clinical presentation includes an unilateral, erythematous, slightly infiltrated scaly plaque and nipple retraction. Sero&#150;sanguineous discharge may be observed. We here report a 51 year old woman who had an eight month history of an eritematous&#150;squamous plaque with hematic scabs in the left nipple, with mild pruritus. A biopsy was taken and the diagnosis confirmed Paget's disease and intraductal breast carcinoma.</i></font></p>     <p align="justify"><font face="verdana" size="2"><b>Key words: </b><i>Mammary Paget's disease, Paget's cells, intraductal breast carcinoma</i></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">La enfermedad de Paget (EP) fue descrita en 1874 por Sir James Paget. Es una manifestaci&oacute;n superficial de enfermedad maligna de la mama.<sup>1</sup> Se presenta entre 1 y 3% de todos los c&aacute;nceres de mama<sup>2</sup> y afecta principalmente mujeres entre los 50 y los 60 a&ntilde;os de edad con una media de 56 a&ntilde;os. La presentaci&oacute;n durante las primeras d&eacute;cadas de la vida es muy rara.  Un tercio de las mujeres afectadas son premenop&aacute;usicas<sup>3</sup> y se ha comunicado mayor incidencia en mujeres nul&iacute;paras.<sup>4</sup> Cuando se presenta en hombres tiene por lo general peor pron&oacute;stico que en las mujeres.<sup>5,6</sup></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Existen dos teor&iacute;as sobre el origen de las c&eacute;lulas de Paget:</font></p>     <p align="justify"><font face="verdana" size="2">I. Teor&iacute;a epidermotr&oacute;pica: establece que las c&eacute;lulas de Paget son c&eacute;lulas de carcinoma intraductal que migran de los ductos del pez&oacute;n a trav&eacute;s de la membrana basal, hasta alcanzar la epidermis.<sup>5,</sup><sup>7</sup></font></p>     <p align="justify"><font face="verdana" size="2">II. Teor&iacute;a de transformaci&oacute;n <i>in situ: </i>postula que las c&eacute;lulas de Paget son queratinocitos que se transforman, consider&aacute;ndose como carcinoma <i>in situ </i>independiente.<sup>5,</sup><sup>8</sup></font></p>     <p align="justify"><font face="verdana" size="2">Hoy en d&iacute;a la teor&iacute;a m&aacute;s aceptada es la primera e incluso se sabe que existe un factor que produce la movilizaci&oacute;n de las c&eacute;lulas de los conductos glandulares hacia la epidermis. Este factor llamado heregulin&#150;a se produce por los queratinocitos epid&eacute;rmicos normales, en donde las c&eacute;lulas de Paget expresan el receptor al factor heregulin (HER2/NEU) para unirse a los queratinocitos y de esta forma migrar e infiltrarse a la epidermis.<sup>9</sup></font></p>     <p align="justify"><font face="verdana" size="2">Cl&aacute;sicamente la EP se presenta unilateralmente como una placa eritematoescamosa, con ligera infiltraci&oacute;n y bordes bien definidos que afectan el &aacute;rea del pez&oacute;n y se extiende hacia la areola con o sin exudado. En etapas m&aacute;s avanzadas la piel de la mama puede verse afectada y ulcerarse, incluso se observa secreci&oacute;n serosa o sanguinolenta a la presi&oacute;n del pez&oacute;n as&iacute; como retracci&oacute;n del mismo.</font></p>     <p align="justify"><font face="verdana" size="2">El 25% de los casos cursa con prurito, dolor y ardor<sup>10</sup> y hasta 50% presentan masa palpable a la exploraci&oacute;n.<sup>11</sup> Casi la totalidad de pacientes con EP cursan con enfermedad mamaria maligna, pero existen excepciones.<sup>12&#150;</sup><sup>14</sup></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Caso cl&iacute;nico</b></font></p>     <p align="justify"><font face="verdana" size="2">El caso correspondi&oacute; a una mujer de 51 a&ntilde;os de edad originaria de Veracruz y residente del Distrito Federal que acudi&oacute; con dermatosis localizada a tronco afectando la mama izquierda y el pez&oacute;n, constituida por eritema, erosiones, costras hem&aacute;ticas, escama fina y exudado, formando una sola placa (<a href="#f1">Figura 1</a>). Presentaba ocho meses de evoluci&oacute;n y como s&iacute;ntomas agregados manifestaba prurito y ardor. Utiliz&oacute; remedios caseros y automedicaci&oacute;n como neomicina sin mostrar mejor&iacute;a. Ten&iacute;a mastograf&iacute;a de seis meses de antig&uuml;edad sin alteraciones.</font></p>     <p align="center"><font face="verdana" size="2"><a name="f1"></a></font></p>     ]]></body>
<body><![CDATA[<p align="center"><font face="verdana" size="2"><img src="/img/revistas/gmm/v142n3/a11f1.jpg"></font></p>     <p align="justify"><font face="verdana" size="2">El caso fue revisado por el Servicio de Ginecolog&iacute;a del hospital en donde a la exploraci&oacute;n mamaria bilateral no se encontraron masas tumorales y en la citolog&iacute;a cut&aacute;nea no se observaron c&eacute;lulas de Paget. La mastograf&iacute;a bilateral mostr&oacute;: estroma mamario denso, asim&eacute;trico, de mayor densidad en mama izquierda, sin n&oacute;dulos, calcificaciones ni engrosamiento de la piel. La biopsia de la lesi&oacute;n mostr&oacute; c&eacute;lulas intraepid&eacute;rmicas ovoides grandes con citoplasma abundante y p&aacute;lido, con n&uacute;cleos hipercrom&aacute;ticos y nucl&eacute;olos aparentes (c&eacute;lulas de Paget) (<a href="#f2">Figura 2</a>).</font></p>     <p align="center"><font face="verdana" size="2"><a name="f2"></a></font></p>     <p align="center"><font face="verdana" size="2"><img src="/img/revistas/gmm/v142n3/a11f2.jpg"></font></p>     <p align="justify"><font face="verdana" size="2">El an&aacute;lisis inmunohistoqu&iacute;mico de citoqueratinas de bajo peso molecular, oncogen c&#150;erb B&#150;2, ant&iacute;geno epitelial de membrana y el ant&iacute;geno carcinoembrionario resultaron positivos. (<a href="#f3">Figuras 3</a> y <a href="#f4">4</a>). Vimentina y S&#150;100 fueron negativos. Con estos resultados se realiz&oacute; el diagn&oacute;stico de EP mamaria con carcinoma intraductal <i>in situ. </i>Fue enviada al Instituto Nacional de Cancerolog&iacute;a donde se le practic&oacute; nuevamente mastograf&iacute;a bilateral que result&oacute; negativa para c&aacute;ncer, ultrasonido mamario normal, ultrasonograf&iacute;a hep&aacute;tica sin actividad tumoral y centellograf&iacute;a &oacute;sea que no mostr&oacute; evidencia de reacci&oacute;n osteog&eacute;nica.</font></p>     <p align="center"><font face="verdana" size="2"><a name="f3"></a></font></p>     <p align="center"><font face="verdana" size="2"><img src="/img/revistas/gmm/v142n3/a11f3.jpg"></font></p>     <p align="center"><font face="verdana" size="2"><a name="f4"></a></font></p>     <p align="center"><font face="verdana" size="2"><img src="/img/revistas/gmm/v142n3/a11f4.jpg"></font></p>     <p align="justify"><font face="verdana" size="2">Se realiz&oacute; mastectom&iacute;a total y el estudio histopatol&oacute;gico revel&oacute; EP del pez&oacute;n con lecho y bordes libres, as&iacute; como disecci&oacute;n de ganglios axilares sin presencia de met&aacute;stasis.</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">La evaluaci&oacute;n de la paciente un a&ntilde;o despu&eacute;s de la cirug&iacute;a no ha revelado complicaciones ni recidivas de la enfermedad.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Discusi&oacute;n</b></font></p>     <p align="justify"><font face="verdana" size="2">La EP es una manifestaci&oacute;n de patolog&iacute;a mamaria. Tiene mayor prevalencia en mujeres entre los 50 y los 60 a&ntilde;os de edad. El diagn&oacute;stico diferencial de la EP es m&uacute;ltiple: eccema, psoriasis, dermatitis por contacto, ti&ntilde;a, carcinoma basocelular, enfermedad de Bowen, melanoma amelan&oacute;tico, papilomatosis subareolar, adenomatosis erosiva del pez&oacute;n, entre otras, por lo que es necesario para el diagn&oacute;stico definitivo realizar una biopsia.<sup>1</sup></font></p>     <p align="justify"><font face="verdana" size="2">Histol&oacute;gicamente se caracteriza por la presencia de c&eacute;lulas de Paget que son c&eacute;lulas epid&eacute;rmicas grandes, redondas u ovoides con abundante citoplasma claro y n&uacute;cleo grande pleom&oacute;rfico e hipercrom&aacute;tico con nucl&eacute;olos aparentes.<sup>10,15,</sup><sup>16 </sup>Las c&eacute;lulas pueden estar aisladas o formando nidos entre las c&eacute;lulas epid&eacute;rmicas y con frecuencia presentan mitosis. Caracter&iacute;sticamente presentan mucina (tinci&oacute;n con PAS o azul alciano). Las tinciones de inmunohistoqu&iacute;mica que muestran m&aacute;s especificidad para la enfermedad de Paget son las citoquinas de bajo peso molecular principalmente la citoqueratina 7 y el oncogen c&#150;erb 2.<sup>17</sup> Aunque las c&eacute;lulas de Paget pueden expresar tambi&eacute;n otros marcadores como el ant&iacute;geno carcinoembrionario (CEA) y el ant&iacute;geno de membrana epitelial (EMA), sin embargo, &eacute;stos son menos espec&iacute;ficos.</font></p>     <p align="justify"><font face="verdana" size="2">Existen diferentes variantes histol&oacute;gicas de las c&eacute;lulas de Paget las de tipo adenocarcinomatoso, fusiforme, anapl&aacute;sico, acantol&iacute;tico y pigmentario.</font></p>     <p align="justify"><font face="verdana" size="2">El diagn&oacute;stico diferencial debe realizarse histol&oacute;gicamente con eccema, adenoma ductal del pez&oacute;n y melanoma maligno.<sup>18,19</sup></font></p>     <p align="justify"><font face="verdana" size="2">Adem&aacute;s de la biopsia existen otros estudios diagn&oacute;sticos que pueden realizarse:</font></p>     <p align="justify"><font face="verdana" size="2">I. Citolog&iacute;a: este es un m&eacute;todo diagn&oacute;stico no invasivo, r&aacute;pido y confiable.<sup>20</sup></font></p>     <p align="justify"><font face="verdana" size="2">II. Estudios de imagen: en una radiograf&iacute;a mamaria puede observarse microcalcificaciones subareolares, cambios arquitecturales y engrosamiento del pez&oacute;n y areola que ayuda a localizar un carcinoma no palpable.</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">De los pacientes con biopsia positiva para enfermedad de Paget, 50 a 70% presentan cambios en la mamograf&iacute;a.<sup>19</sup></font></p>     <p align="justify"><font face="verdana" size="2">La enfermedad de Paget se acompa&ntilde;a con mayor frecuencia de carcinoma intraductal <i>in situ </i>o invasivo y presenta cuatro estadios:</font></p>     <p align="justify"><font face="verdana" size="2">Estadio 0: afectaci&oacute;n epid&eacute;rmica sin presentar carcinoma ductal <i>in situ </i>(muy raro). </font></p>     <p align="justify"><font face="verdana" size="2">Estadio 1: asociado con carcinoma justo por debajo del pez&oacute;n <i>in situ </i>(frecuente).</font></p>     <p align="justify"><font face="verdana" size="2">Estadio 2: asociado a carcinoma intraductal extensivo (muy frecuente).</font></p>     <p align="justify"><font face="verdana" size="2">Estadio 3: asociado a carcinoma ductal invasivo (relativamente frecuente).</font></p>     <p align="justify"><font face="verdana" size="2">De los pacientes que presentan EP, 40 a 50% tienen un estadio 1&#150;2 (como el caso que se presenta), sin masa tumoral palpable. Si existe una masa se debe pensar en un carcinoma invasor, 60% de estos pacientes presentan adenomegalias axilares.<sup>10,13,</sup><sup>15,</sup><sup>21&#150;</sup><sup>23</sup></font></p>     <p align="justify"><font face="verdana" size="2">Para el tratamiento de la EP se utilizan varias conductas terap&eacute;uticas:</font></p>     <p align="justify"><font face="verdana" size="2">1. Escisi&oacute;n del complejo areola&#150;pez&oacute;n para pacientes con masa no palpable.  Este procedimiento tiene alta recurrencia, en un estudio realizado por Dixon y cols., demostraron que en 10 pacientes 4 tuvieron recurrencia con met&aacute;stasis a ganglios.<sup>24</sup></font></p>     <p align="justify"><font face="verdana" size="2">2. Radiaci&oacute;n sin resecci&oacute;n: para el caso de pacientes sin masa palpable y con mamograf&iacute;a negativa. Al radiar la mama y la regi&oacute;n axilar se informa una cura en 81% de los pacientes estudiados por 8 a&ntilde;os.<sup>25</sup></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">3. Mastectom&iacute;a total + radiaci&oacute;n. En este caso, 19% de las mastectom&iacute;as en pacientes con masa no palpable mostr&oacute; carcinoma y en tanto que &eacute;ste se encontr&oacute; en el 90% de pacientes con masa palpable. En la resecci&oacute;n ganglionar se encontr&oacute; met&aacute;stasis de 0&#150;8% en pacientes en los que no era palpable y en el 50&#150;60% en los que s&iacute; era.</font></p>     <p align="justify"><font face="verdana" size="2">El pron&oacute;stico de la enfermedad depende del estadio en el que se encuentre, teniendo mayor supervivencia aqu&eacute;llos sin masa tumoral palpable. El 30% de los casos sin tumor desarrollan carcinoma intraductal tard&iacute;amente y 20% presentan el carcinoma a la hora del diagn&oacute;stico de EP. El riesgo de muerte por carcinoma metast&aacute;sico en pacientes con EP es de 61.3% con una sobrevida a 10 a&ntilde;os de 33%.<sup>19</sup> En el presente caso, la paciente present&oacute; la enfermedad en el margen de edad esperada y no exist&iacute;an otros factores de riesgo como nuliparidad o premenopausia. Present&oacute; un estadio 2 que es de los m&aacute;s frecuentes y con mejor pron&oacute;stico al no contar con masa tumoral palpable. No recibi&oacute; radioterapia posquir&uacute;rgica, se realizaron marcadores para receptores de estr&oacute;genos y progest&aacute;genos los cuales fueron negativos y debido a que la enfermedad estaba confinada al complejo areola&#150;pez&oacute;n con m&aacute;rgenes, lecho y ganglios libres, se decidi&oacute; mantenerla en observaci&oacute;n sin presentar hasta el momento complicaciones.</font></p>     <p align="justify"><font face="verdana" size="2">En conclusi&oacute;n, es importante descartar la EP en casos que presenten placas eccematosas resistentes al tratamiento sobre todo si es unilateral, ya que su diagn&oacute;stico temprano puede mejorar la supervivencia de los pacientes.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Referencias</b></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">1.<b> Whitaker&#150;Worth L, Carlone V, Susser S, Phelan N, Grant&#150;Kels M. </b>Dermatologic diseases of the breast and nipple. 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