{"id":6038,"date":"2020-11-12T23:57:25","date_gmt":"2020-11-12T23:57:25","guid":{"rendered":"https:\/\/dermatly.com\/patologia-del-histiocitoma-epitelioide\/"},"modified":"2026-03-10T16:24:23","modified_gmt":"2026-03-10T16:24:23","slug":"patologia-di-epitelioide-istiocitoma","status":"publish","type":"glossary","link":"https:\/\/dermatly.com\/it\/patologia-del-histiocitoma-epitelioide\/","title":{"rendered":"Patologia dell'istocitoma epitelioide"},"content":{"rendered":"<section class=\"textBlock\">\n<h1>Entendiendo el Histiocitoma Epitelioide Celular: Caracter\u00edsticas y Diagn\u00f3stico<\/h1>\n<p>El <strong class=\"term\" data-term-id=\"1667\">Histiocitoma Epitelioide<\/strong> Celular representa una variaci\u00f3n bien reconocida del histiocitoma fibroso <span class=\"term\" data-term-id=\"47\">cut\u00e1neo<\/span>. Este tipo de tumor puede plantear dificultades diagn\u00f3sticas significativas, ya que frecuentemente simula otras <span class=\"term\" data-term-id=\"22\">lesiones benignas<\/span> y <span class=\"term\" data-term-id=\"176\">malignas<\/span> derivadas del tejido mesenquimal. Cl\u00ednicamente, tambi\u00e9n se le conoce como histiocitoma fibroso epitelioide o dermatofibroma epitelioide, lo cual subraya la importancia de una evaluaci\u00f3n histopatol\u00f3gica precisa.<\/p>\n<h2>Caracter\u00edsticas Histol\u00f3gicas Fundamentales del Histiocitoma Epitelioide<\/h2>\n<p>El an\u00e1lisis de cortes histol\u00f3gicos del histiocitoma epitelioide revela consistentemente una <span class=\"term\" data-term-id=\"37\">tumoraci\u00f3n<\/span> <span class=\"term\" data-term-id=\"289\">circunscrita<\/span>. T\u00edpicamente, esta lesi\u00f3n se sit\u00faa en profundidad, habitualmente bajo un collar de epidermis reactiva (Imagen 1). Estructuralmente, esta neoplasia se distingue por la disposici\u00f3n de sus componentes celulares en l\u00e1minas, aunque en algunos casos puede adoptar un patr\u00f3n estoriforme.<\/p>\n<p>Las <span class=\"term\" data-term-id=\"2053\">c\u00e9lulas epitelioides<\/span> individuales destacan por poseer un <span class=\"term\" data-term-id=\"838\">citoplasma<\/span> <span class=\"term\" data-term-id=\"449\">eosin\u00f3filo<\/span> abundante. Sus <span class=\"term\" data-term-id=\"729\">n\u00facleos<\/span> son, en general, redondos y <span class=\"term\" data-term-id=\"1029\">vesiculares<\/span>, albergando nucl\u00e9olos que suelen ser bastante prominentes (Im\u00e1genes 2-4). Es habitual observar un considerable aumento del tama\u00f1o celular, pudiendo manifestarse cierto grado de <span class=\"term\" data-term-id=\"1305\">atipia nuclear<\/span> (Imagen 4), un factor clave a considerar en el diagn\u00f3stico diferencial.<\/p>\n<p>Un hallazgo frecuente es la presencia de un <span class=\"term\" data-term-id=\"541\">infiltrado<\/span> de elementos <span class=\"term\" data-term-id=\"490\">inflamatorias<\/span> mixtos, un patr\u00f3n que a menudo apoya la confirmaci\u00f3n diagn\u00f3stica (Imagen 3). Las figuras de <span class=\"term\" data-term-id=\"1535\">mitosis<\/span> son escasas. Adem\u00e1s, no es raro identificar ocasionalmente <span class=\"term\" data-term-id=\"739\">c\u00e9lulas gigantes<\/span> <span class=\"term\" data-term-id=\"736\">multinucleadas<\/span> y dep\u00f3sitos de <span class=\"term\" data-term-id=\"119\">hemosiderina<\/span> (descritos hist\u00f3ricamente como <span class=\"term\" data-term-id=\"370\">declaraci\u00f3n<\/span> de malignidad en descripciones previas) (Imagen 3).<\/p>\n<section class=\"textBlock imageLinkBlockTitle\">\n<h2 class=\"colour--primary\">Evaluaci\u00f3n Patol\u00f3gica Detallada del Histiocitoma Epitelioide<\/h2>\n<\/section>\n<section class=\"imageLinkBlock\">\n<div class=\"flex\">\n<div class=\"imageLinkBlock__item__image\">\n<figure>\n                        <img decoding=\"async\" src=\"https:\/\/dermatly.com\/wp-content\/uploads\/2020\/11\/epithelioid-histiocytoma-figure-1__ProtectWyJQcm90ZWN0Il0_FocusFillWzI5NCwyMjIsIngiLDFd.jpg\" alt=\"Histolog\u00eda del Histiocitoma Epitelioide: Tumoraci\u00f3n circunscrita subyacente a un collarette epid\u00e9rmico (Figura 1).\"><figcaption>\n<p class=\"p-small\">Figura 1<\/p>\n<\/figcaption><\/figure>\n<\/p><\/div>\n<div class=\"imageLinkBlock__item__image\">\n<figure>\n                        <img decoding=\"async\" src=\"https:\/\/dermatly.com\/wp-content\/uploads\/2020\/11\/epithelioid-histiocytoma-figure-2__ProtectWyJQcm90ZWN0Il0_FocusFillWzI5NCwyMjIsIngiLDFd.jpg\" alt=\"Detalle celular del Histiocitoma Epitelioide mostrando c\u00e9lulas epitelioides con citoplasma eosin\u00f3filo y n\u00facleos vesiculares (Figura 2).\"><figcaption>\n<p class=\"p-small\">Figura 2<\/p>\n<\/figcaption><\/figure>\n<\/p><\/div>\n<div class=\"imageLinkBlock__item__image\">\n<figure>\n                        <img decoding=\"async\" src=\"https:\/\/dermatly.com\/wp-content\/uploads\/2020\/11\/epithelioid-histiocytoma-figure-3__ProtectWyJQcm90ZWN0Il0_FocusFillWzI5NCwyMjIsIngiLDFd.jpg\" alt=\"Asociaci\u00f3n de un infiltrado inflamatorio en el histiocitoma epitelioide, junto a dep\u00f3sitos de hemosiderina (Figura 3).\"><figcaption>\n<p class=\"p-small\">Figura 3<\/p>\n<\/figcaption><\/figure>\n<\/p><\/div>\n<div class=\"imageLinkBlock__item__image\">\n<figure>\n                        <img decoding=\"async\" src=\"https:\/\/dermatly.com\/wp-content\/uploads\/2020\/11\/epithelioid-histiocytoma-figure-4__ProtectWyJQcm90ZWN0Il0_FocusFillWzI5NCwyMjIsIngiLDFd.jpg\" alt=\"Manifestaci\u00f3n de atipia nuclear en las c\u00e9lulas epitelioides caracter\u00edsticas del histiocitoma (Figura 4).\"><figcaption>\n<p class=\"p-small\">Figura 4<\/p>\n<\/figcaption><\/figure>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n<div class=\"clearfix imageLinkBlock\"><\/div>\n<h2>Estudios Especiales Necesarios para el Diagn\u00f3stico del Histiocitoma Epitelioide<\/h2>\n<p>Para establecer un diagn\u00f3stico definitivo y diferenciar el histiocitoma epitelioide de otras proliferaciones histioc\u00edticas simuladoras, los estudios inmunohistoqu\u00edmicos son absolutamente cruciales. Estos marcadores ayudan a confirmar el linaje celular y a diferenciarlo de sarcomas o carcinomas que puedan tener morfolog\u00eda similar.<\/p>\n<h3>Inmunohistoqu\u00edmica y Diagn\u00f3stico Diferencial<\/h3>\n<p>En las tinciones especiales, las c\u00e9lulas tumorales del histiocitoma epitelioide t\u00edpicamente muestran un perfil inmunofenot\u00edpico caracter\u00edstico. Es fundamental evaluar la positividad para:<\/p>\n<ul>\n<li>Marcadores histioc\u00edticos como CD68 (generalmente positivo).<\/li>\n<li>La expresi\u00f3n de queratinas (que suele ser negativa, diferenci\u00e1ndolo de carcinomas).<\/li>\n<li>El marcador CD1a y la Prote\u00edna S100, los cuales suelen ser negativos, ayudando a excluir los histiocitomas de c\u00e9lulas de Langerhans y otros tumores dendr\u00edticos.<\/li>\n<\/ul>\n<p>Si bien la histolog\u00eda es sugestiva, la inmunohistoqu\u00edmica determina la naturaleza de esta neoplasia benigna y excluye diagn\u00f3sticos m\u00e1s serios. El perfil inmunoreactivo permite al pat\u00f3logo consolidar la sospecha cl\u00ednica y morfol\u00f3gica, proporcionando la base para un manejo cl\u00ednico adecuado.<\/p>\n<\/section>\n<h2>An\u00e1lisis Inmunohistoqu\u00edmico y Caracter\u00edsticas Moleculares del Histiocitoma Epitelioide<\/h2>\n<p>Los an\u00e1lisis inmunohistoqu\u00edmicos rutinariamente revelan positividad para el Factor 13a y muestran una reactividad variable para el CD68. De manera m\u00e1s reciente, se ha reportado la presencia de la translocaci\u00f3n del gen ALK-1 en ciertos subtipos de este tumor. Esta alteraci\u00f3n gen\u00e9tica puede ser identificada con precisi\u00f3n mediante t\u00e9cnicas avanzadas como la <span class=\"term\" data-term-id=\"1421\">inmunohistoqu\u00edmica<\/span> dirigida o utilizando la hibridaci\u00f3n in situ con fluorescencia (<span class=\"term\" data-term-id=\"1237\">FISH<\/span>).<\/p>\n<div id=\"square-placement-country-holder\" class=\"country-dependent advert\">\n<div class=\"box-placement square-placement\">\n<div class=\"advert__frame\">\n            <!-- \/340621630\/dermnet_mobile_afterfirstsection_300x250 --><\/p>\n<div style=\"display: none;\" id=\"hidden-div-gpt-ad-1484122037505-8\" class=\"[ js-hideable ]\"><\/div>\n<p>            <script>\n                if (ads_screenwidth\n<\/script>\n        <\/div>\n<\/p><\/div>\n<\/div>\n<p>El enfoque diagn\u00f3stico correcto, que combina la morfolog\u00eda cl\u00e1sica con estudios moleculares detallados, es esencial para diferenciar el histiocitoma epitelioide de otras proliferaciones d\u00e9rmicas que pueden simularlo. La identificaci\u00f3n certera de estas caracter\u00edsticas histol\u00f3gicas contribuye de manera significativa al establecimiento del manejo cl\u00ednico m\u00e1s apropiado para esta entidad.<\/p>\n<div class=\"article-content\">\n    <script>\n        if (window.innerWidth < 780) {\n            var inline = document.createElement(\"div\");\n            var ad = document.createElement(\"div\");\n\n            ad.id = 'div-gpt-ad-1484122037505-8';\n            ad.style.height = \"250px\";\n            ad.style.width = \"300px;\";\n\n            inline.appendChild(ad);\n            inline.className = \"inline\";\n            var placeholder = document.getElementById(\"hidden-div-gpt-ad-1484122037505-8\");\n            placeholder.parentNode.replaceChild(inline, placeholder);\n            (function () {\n                googletag.cmd.push(function () {\n                    googletag.display('div-gpt-ad-1484122037505-8');\n                });\n            })();\n        }\n    <\/script><\/p>\n<div class=\"ad-container\">\n        <!-- Ad container structure preserved -->\n    <\/div>\n<section>\n<h2>Consideraciones para el Diagn\u00f3stico Diferencial del Histiocitoma Epitelioide<\/h2>\n<p>Establecer el diagn\u00f3stico diferencial del histiocitoma epitelioide requiere una meticulosa evaluaci\u00f3n para distinguirlo adecuadamente de neoplasias con apariencias morfol\u00f3gicas similares.<\/p>\n<h3>Diferenciaci\u00f3n con Melanoma Amelan\u00f3tico<\/h3>\n<p>El melanoma que carece de pigmentaci\u00f3n (amelan\u00f3tico) presenta c\u00e9lulas epitelioides grandes que pueden confundirse superficialmente con el histiocitoma. No obstante, el melanoma t\u00edpicamente manifiesta un mayor grado de pleomorfismo celular, junto con una afectaci\u00f3n epid\u00e9rmica m\u00e1s marcada. La tinci\u00f3n inmunohistoqu\u00edmica para S100 es un marcador diagn\u00f3stico fundamental que suele resultar positivo en el melanoma.<\/p>\n<h3>Distinci\u00f3n del Sarcoma Epitelioide<\/h3>\n<p>El sarcoma epitelioide se distingue cl\u00ednicamente por exhibir grupos con morfolog\u00eda de tipo granuloma, frecuentemente asociados a necrosis y una atipia celular acentuada. Adicionalmente, la persistencia de positividad en los m\u00e1rgenes quir\u00fargicos (<span class=\"term\" data-term-id=\"155\">bordillo<\/span>+) es una caracter\u00edstica m\u00e1s atribuible a este subtipo de sarcoma.<\/p>\n<h3>Exclusi\u00f3n de Otros Tumores D\u00e9rmicos Epitelioides<\/h3>\n<p>Al evaluar otros tumores d\u00e9rmicos que exhiben caracter\u00edsticas epitelioides, la utilizaci\u00f3n de estudios inmunohistoqu\u00edmicos se establece como el pilar para asegurar una correcta discriminaci\u00f3n diagn\u00f3stica. Estos ensayos son vitales para descartar neoplasias como tumores vasculares, tumores de m\u00fasculo liso y otras histiociosis primarias, garantizando la m\u00e1xima precisi\u00f3n en el diagn\u00f3stico final.<\/p>\n<\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Entendiendo el Histiocitoma Epitelioide Celular: Caracter\u00edsticas y Diagn\u00f3stico El Histiocitoma Epitelioide Celular representa una variaci\u00f3n bien reconocida del histiocitoma fibroso cut\u00e1neo. Este tipo de tumor puede plantear dificultades diagn\u00f3sticas significativas, ya que frecuentemente simula otras lesiones benignas y malignas derivadas del tejido mesenquimal. Cl\u00ednicamente, tambi\u00e9n se le conoce como histiocitoma fibroso epitelioide o dermatofibroma epitelioide, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6043,"parent":0,"template":"","glossary-cat":[],"class_list":["post-6038","glossary","type-glossary","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.2 (Yoast SEO v27.1.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Patolog\u00eda del histiocitoma epitelioide - Dermatly.com - El sitio de tu piel<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dermatly.com\/it\/patologia-di-epitelioide-istiocitoma\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Patolog\u00eda del histiocitoma epitelioide\" \/>\n<meta property=\"og:description\" content=\"Entendiendo el Histiocitoma Epitelioide Celular: Caracter\u00edsticas y Diagn\u00f3stico El Histiocitoma Epitelioide Celular representa una variaci\u00f3n bien reconocida del histiocitoma fibroso cut\u00e1neo. 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Este tipo de tumor puede plantear dificultades diagn\u00f3sticas significativas, ya que frecuentemente simula otras lesiones benignas y malignas derivadas del tejido mesenquimal. 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