{"id":17727,"date":"2026-09-27T17:40:17","date_gmt":"2026-09-27T17:40:17","guid":{"rendered":"https:\/\/atlasemhematologia.com.br\/blog\/?p=17727"},"modified":"2026-09-21T17:42:20","modified_gmt":"2026-09-21T17:42:20","slug":"hemoglobinuria-paroxistica-noturna-2","status":"publish","type":"post","link":"https:\/\/atlasemhematologia.com.br\/blog\/hemoglobinuria-paroxistica-noturna-2\/","title":{"rendered":"Hemoglobin\u00faria Parox\u00edstica Noturna"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">A Hemoglobin\u00faria Parox\u00edstica Noturna \u00e9 uma doen\u00e7a clonal da c\u00e9lula-tronco hematopo\u00e9tica, caracterizada pela aus\u00eancia de prote\u00ednas reguladoras do complemento na superf\u00edcie das c\u00e9lulas sangu\u00edneas. Sem essas prote\u00ednas, as hem\u00e1cias, leuc\u00f3citos e plaquetas ficam vulner\u00e1veis \u00e0 destrui\u00e7\u00e3o mediada pelo sistema complemento, especialmente durante per\u00edodos de sono, infec\u00e7\u00f5es ou outros gatilhos que ativam a via do complemento.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trata-se de uma doen\u00e7a rara, frequentemente subdiagnosticada, com apresenta\u00e7\u00e3o cl\u00ednica e laboratorial heterog\u00eanea. O hemograma e o esfrega\u00e7o podem fornecer as primeiras pistas diagn\u00f3sticas, especialmente quando associados a achados cl\u00ednicos caracter\u00edsticos.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"640\" height=\"320\" src=\"https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/09\/image-15.png\" alt=\"\" class=\"wp-image-17728\" style=\"aspect-ratio:2;width:602px;height:auto\" srcset=\"https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/09\/image-15.png 640w, https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/09\/image-15-300x150.png 300w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Achados do hemograma na HPN: anemia hemol\u00edtica e pancitopenia<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">O hemograma na HPN reflete a destrui\u00e7\u00e3o eritrocit\u00e1ria mediada pelo complemento e pode variar consideravelmente conforme a extens\u00e3o do clone HPN e a fase da doen\u00e7a. A anemia \u00e9 o achado mais constante e resulta da hem\u00f3lise intravascular cr\u00f4nica. Trata-se de uma anemia normoc\u00edtica normocr\u00f4mica, com reticulocitose vari\u00e1vel. Entretanto, a defici\u00eancia de ferro \u00e9 comum na HPN, pois a hemoglobina livre liberada pela hem\u00f3lise intravascular \u00e9 excretada na urina, carregando consigo o ferro. Com o tempo, desenvolve-se microcitose e hipocromia sobrepostas ao padr\u00e3o hemol\u00edtico, dificultando a interpreta\u00e7\u00e3o dos \u00edndices hematim\u00e9tricos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A pancitopenia est\u00e1 presente em uma parcela significativa dos pacientes com HPN, especialmente naqueles com sobreposi\u00e7\u00e3o de anemia apl\u00e1sica, condi\u00e7\u00e3o frequentemente associada \u00e0 HPN. Nesse cen\u00e1rio, o hemograma mostra queda das tr\u00eas s\u00e9ries, e o mielograma revela medula hipocelular com clone HPN identific\u00e1vel por citometria de fluxo. A combina\u00e7\u00e3o de pancitopenia com hem\u00f3lise intravascular \u00e9 uma apresenta\u00e7\u00e3o que deve sempre levantar suspeita de HPN.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Hem\u00f3lise intravascular: como o laborat\u00f3rio a identifica<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">A hem\u00f3lise intravascular na HPN produz um conjunto de achados laboratoriais que, integrados ao hemograma, permitem o diagn\u00f3stico diferencial. A haptoglobina s\u00e9rica est\u00e1 reduzida ou indetect\u00e1vel, pois a prote\u00edna \u00e9 consumida ao se ligar \u00e0 hemoglobina livre plasm\u00e1tica. A DHL est\u00e1 elevada, refletindo a libera\u00e7\u00e3o do conte\u00fado celular. A bilirrubina indireta pode estar aumentada, e a hemoglobin\u00faria, a hemossiderin\u00faria e a hemoglobinemia s\u00e3o achados que confirmam a hem\u00f3lise de origem intravascular.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">No esfrega\u00e7o, a morfologia eritrocit\u00e1ria pode ser relativamente preservada, sem os poiquil\u00f3citos t\u00edpicos das anemias hemol\u00edticas mec\u00e2nicas. Esse aspecto diferencia a HPN das anemias hemol\u00edticas microangiop\u00e1ticas e refor\u00e7a a import\u00e2ncia da integra\u00e7\u00e3o entre morfologia e dados bioqu\u00edmicos na investiga\u00e7\u00e3o da hem\u00f3lise.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Diagn\u00f3stico confirmat\u00f3rio e papel da citometria de fluxo<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">O diagn\u00f3stico definitivo de HPN \u00e9 feito pela citometria de fluxo, que demonstra a aus\u00eancia ou redu\u00e7\u00e3o das prote\u00ednas CD55 e CD59 na superf\u00edcie das c\u00e9lulas sangu\u00edneas. Essas glicoprote\u00ednas reguladoras do complemento s\u00e3o ancoradas \u00e0 membrana celular por meio de uma \u00e2ncora de GPI, cuja s\u00edntese est\u00e1 comprometida pela muta\u00e7\u00e3o no gene PIG-A nas c\u00e9lulas do clone HPN. A citometria de fluxo deve ser realizada em eritr\u00f3citos, granul\u00f3citos e mon\u00f3citos, para maximizar a sensibilidade diagn\u00f3stica.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O laborat\u00f3rio deve suspeitar de HPN diante de anemia hemol\u00edtica de causa n\u00e3o esclarecida, pancitopenia com hem\u00f3lise, trombose em s\u00edtios incomuns como veias hep\u00e1ticas, portais e cerebrais, e defici\u00eancia de ferro sem sangramento identificado. Qualquer um desses cen\u00e1rios justifica a solicita\u00e7\u00e3o de citometria de fluxo para pesquisa de clone HPN, exame que, em muitos servi\u00e7os, pode ser iniciado a partir da orienta\u00e7\u00e3o do profissional de laborat\u00f3rio.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/eventos.atlasemhematologia.com.br\/listadeesperatimeblogatlas\"><img decoding=\"async\" width=\"1030\" height=\"276\" src=\"https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-1030x276.png\" alt=\"\" class=\"wp-image-17314\" srcset=\"https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-1030x276.png 1030w, https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-300x80.png 300w, https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-768x206.png 768w, https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-1536x411.png 1536w, https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-2048x549.png 2048w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Refer\u00eancias<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">OLIVEIRA, Larissa Santana; ALCANTARA, Thiago Ruan de Lima. <em>Atlas em hematologia: um guia visual para a identifica\u00e7\u00e3o de c\u00e9lulas sangu\u00edneas<\/em>. 1. ed. Salvador: Oxente, 2025.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">BRODSKY, Robert A. Paroxysmal nocturnal hemoglobinuria. <strong>Blood, The Journal of the American Society of Hematology<\/strong>, v. 124, n. 18, p. 2804-2811, 2014.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PARKER, Charles et al. Diagnosis and management of paroxysmal nocturnal hemoglobinuria. <strong>Blood<\/strong>, v. 106, n. 12, p. 3699-3709, 2005.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A Hemoglobin\u00faria Parox\u00edstica Noturna \u00e9 uma doen\u00e7a clonal da c\u00e9lula-tronco hematopo\u00e9tica, caracterizada pela aus\u00eancia de prote\u00ednas reguladoras do complemento na superf\u00edcie das c\u00e9lulas sangu\u00edneas. Sem essas prote\u00ednas, as hem\u00e1cias, leuc\u00f3citos e plaquetas ficam vulner\u00e1veis \u00e0 destrui\u00e7\u00e3o mediada pelo sistema complemento, especialmente durante per\u00edodos de sono, infec\u00e7\u00f5es ou outros gatilhos que ativam a via do complemento.&nbsp; [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":17729,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"pagelayer_contact_templates":[],"_pagelayer_content":"","footnotes":""},"categories":[18],"tags":[],"class_list":["post-17727","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-doencas-hematologicas"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Hemoglobin\u00faria Parox\u00edstica Noturna - Blog - Atlas em Hematologia<\/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:\/\/atlasemhematologia.com.br\/blog\/hemoglobinuria-paroxistica-noturna-2\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hemoglobin\u00faria Parox\u00edstica Noturna - Blog - Atlas em Hematologia\" \/>\n<meta property=\"og:description\" content=\"A Hemoglobin\u00faria Parox\u00edstica Noturna \u00e9 uma doen\u00e7a clonal da c\u00e9lula-tronco hematopo\u00e9tica, caracterizada pela aus\u00eancia de prote\u00ednas reguladoras do complemento na superf\u00edcie das c\u00e9lulas sangu\u00edneas. Sem essas prote\u00ednas, as hem\u00e1cias, leuc\u00f3citos e plaquetas ficam vulner\u00e1veis \u00e0 destrui\u00e7\u00e3o mediada pelo sistema complemento, especialmente durante per\u00edodos de sono, infec\u00e7\u00f5es ou outros gatilhos que ativam a via do complemento.&nbsp; [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/atlasemhematologia.com.br\/blog\/hemoglobinuria-paroxistica-noturna-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Atlas em Hematologia\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-27T17:40:17+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/09\/2708-BLOG.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1080\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"EQUIPE SOCIAL MEDIA INML\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"EQUIPE SOCIAL MEDIA INML\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. tempo de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/atlasemhematologia.com.br\/blog\/hemoglobinuria-paroxistica-noturna-2\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/atlasemhematologia.com.br\/blog\/hemoglobinuria-paroxistica-noturna-2\/\"},\"author\":{\"name\":\"EQUIPE SOCIAL MEDIA INML\",\"@id\":\"https:\/\/atlasemhematologia.com.br\/blog\/#\/schema\/person\/196f68c9c85dd34becfda2cfd3e084a2\"},\"headline\":\"Hemoglobin\u00faria Parox\u00edstica Noturna\",\"datePublished\":\"2026-09-27T17:40:17+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/atlasemhematologia.com.br\/blog\/hemoglobinuria-paroxistica-noturna-2\/\"},\"wordCount\":685,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/atlasemhematologia.com.br\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/atlasemhematologia.com.br\/blog\/hemoglobinuria-paroxistica-noturna-2\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/09\/2708-BLOG.png\",\"articleSection\":[\"DOEN\u00c7AS HEMATOL\u00d3GICAS\"],\"inLanguage\":\"pt-BR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/atlasemhematologia.com.br\/blog\/hemoglobinuria-paroxistica-noturna-2\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/atlasemhematologia.com.br\/blog\/hemoglobinuria-paroxistica-noturna-2\/\",\"url\":\"https:\/\/atlasemhematologia.com.br\/blog\/hemoglobinuria-paroxistica-noturna-2\/\",\"name\":\"Hemoglobin\u00faria Parox\u00edstica Noturna - 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