{"id":1804,"date":"2025-11-13T14:46:09","date_gmt":"2025-11-13T11:46:09","guid":{"rendered":"https:\/\/wiki.dev.voka.io\/?post_type=glossary_item&#038;p=1804"},"modified":"2025-11-13T14:46:07","modified_gmt":"2025-11-13T11:46:07","slug":"leucemia","status":"publish","type":"glossary_item","link":"https:\/\/wiki.dev.voka.io\/pt\/glossario\/leucemia\/","title":{"rendered":"Leucemia"},"content":{"rendered":"\n<p>A leucemia, ou cancro no sangue, \u00e9 uma doen\u00e7a maligna (oncol\u00f3gica) do sistema hematopoi\u00e9tico. \u00c9 caracterizada pela multiplica\u00e7\u00e3o descontrolada e acumula\u00e7\u00e3o de leuc\u00f3citos anormais (gl\u00f3bulos brancos) na medula \u00f3ssea.<\/p>\n\n<p>O processo patol\u00f3gico come\u00e7a na medula \u00f3ssea, onde uma c\u00e9lula hematopoi\u00e9tica sofre muta\u00e7\u00e3o e d\u00e1 origem a um clone tumoral. Essas c\u00e9lulas leuc\u00e9micas gradualmente substituem e suprimem os brotos hematopoi\u00e9ticos normais, levando ao desenvolvimento de anemia, hemorragias e complica\u00e7\u00f5es infecciosas graves.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-&#x43A;&#x43B;&#x430;&#x441;&#x441;&#x438;&#x444;&#x438;&#x43A;&#x430;&#x446;&#x438;&#x44F;-&#x438;-&#x43F;&#x430;&#x442;&#x43E;&#x444;&#x438;&#x437;&#x438;&#x43E;&#x43B;&#x43E;&#x433;&#x438;&#x44F;\"><strong>Classifica\u00e7\u00e3o e fisiopatologia<\/strong><\/h2>\n\n<p>As leucemias s\u00e3o classificadas por duas caracter\u00edsticas principais: pela sua evolu\u00e7\u00e3o (agudas e cr\u00f3nicas) e pelo tipo de c\u00e9lulas afetadas (linfobl\u00e1sticas e mielobl\u00e1sticas). Criam-se assim quatro grupos principais de doen\u00e7as:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>Leucemia linfobl\u00e1stica aguda (LLA).<\/strong> \u00c9 mais comum em crian\u00e7as.<\/li>\n\n\n\n<li><strong>Leucemia mielobl\u00e1stica aguda (LMA).<\/strong> Este tipo da leucemia aguda \u00e9 mais comum em adultos.<\/li>\n\n\n\n<li><strong>Leucemia linfoc\u00edtica cr\u00f3nica (LLC).<\/strong> \u00c9 t\u00edpica nos idosos.<\/li>\n\n\n\n<li><strong>Leucemia miel\u00f3ide cr\u00f3nica (LMC).<\/strong><\/li>\n<\/ul>\n\n<p>Na leucemia aguda, c\u00e9lulas imaturas (blastos) proliferam na medula \u00f3ssea e a doen\u00e7a progride muito rapidamente. Na leucemia cr\u00f3nica, as c\u00e9lulas tumorais s\u00e3o mais maduras e o curso da doen\u00e7a \u00e9 lento, frequentemente assintom\u00e1tico nos est\u00e1gios iniciais.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-&#x43A;&#x43B;&#x438;&#x43D;&#x438;&#x447;&#x435;&#x441;&#x43A;&#x43E;&#x435;-&#x437;&#x43D;&#x430;&#x447;&#x435;&#x43D;&#x438;&#x435;\"><strong>Import\u00e2ncia cl\u00ednica<\/strong><\/h2>\n\n<p>As manifesta\u00e7\u00f5es cl\u00ednicas da leucemia s\u00e3o causadas pela supress\u00e3o da hematopoiese normal. Os sintomas s\u00e3o frequentemente inespec\u00edficos: fraqueza e palidez ( por causa da anemia), infec\u00e7\u00f5es frequentes (devido \u00e0 falta de leuc\u00f3citos normais), sangramento das gengivas, hematomas e hemorragias nasais ( por falta de plaquetas). Tamb\u00e9m podem ocorrer dores \u00f3sseas, aumento dos g\u00e2nglios linf\u00e1ticos e do ba\u00e7o.<\/p>\n\n<p>O diagn\u00f3stico come\u00e7a com um hemograma completo, que revela altera\u00e7\u00f5es caracter\u00edsticas. O diagn\u00f3stico definitivo e a determina\u00e7\u00e3o do tipo de leucemia s\u00e3o estabelecidos atrav\u00e9s de um exame da medula \u00f3ssea (pun\u00e7\u00e3o esternal ou trepana\u00e7\u00e3o).<\/p>\n\n<p>O tratamento depende do tipo de leucemia, idade do paciente e outros fatores. Inclui quimioterapia, terapia direcionada, imunoterapia e transplante de c\u00e9lulas estaminais hematopoi\u00e9ticas.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A leucemia, ou cancro no sangue, \u00e9 uma doen\u00e7a maligna (oncol\u00f3gica) do sistema hematopoi\u00e9tico. \u00c9 caracterizada pela multiplica\u00e7\u00e3o descontrolada e acumula\u00e7\u00e3o de leuc\u00f3citos anormais (gl\u00f3bulos brancos) na medula \u00f3ssea.<\/p>\n","protected":false},"featured_media":0,"template":"","class_list":["post-1804","glossary_item","type-glossary_item","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v26.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Leucemia: defini\u00e7\u00e3o m\u00e9dica e vis\u00e3o geral | Voka Wiki<\/title>\n<meta name=\"description\" content=\"A leucemia, ou cancro no sangue, \u00e9 uma doen\u00e7a maligna (oncol\u00f3gica) do sistema hematopoi\u00e9tico. 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