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{"id":2656,"date":"2021-11-25T08:00:00","date_gmt":"2021-11-25T08:00:00","guid":{"rendered":"https:\/\/site01.simplexhost.com.br\/?p=589"},"modified":"2021-11-25T08:00:00","modified_gmt":"2021-11-25T08:00:00","slug":"rabdomiossarcoma-embrionario","status":"publish","type":"post","link":"https:\/\/mobilemed.com.br\/2021\/11\/25\/rabdomiossarcoma-embrionario\/","title":{"rendered":"Rabdomiossarcoma Embrion\u00e1rio"},"content":{"rendered":"\n
Os rabdomiossarcoma consistem em tumores de origem mesenquimal com c\u00e9lulas de morfologia muscular esquel\u00e9tica. Cerca de 40% dos rabdomiossarcoma acometem a regi\u00e3o da cabe\u00e7a e pesco\u00e7o, sendo este o sarcoma mais comum desta localidade. Acometem mais comumente indiv\u00edduos jovens, com maior incid\u00eancia entre os 5 e 6 anos de idade, sendo o tumor mais comum na inf\u00e2ncia, representando de 5 a 8% dos tumores malignos desta faixa et\u00e1ria.<\/p>\n\n\n\n
Histologicamente, os rabdomiossarcomas s\u00e3o divididos em tr\u00eas subgrupos. O subtipo embrion\u00e1rio encontrado neste relato, \u00e9 o mais comum (70%),podendo ser subdividido em embrion\u00e1rio propriamente dito, botrioide e de c\u00e9lulas fusiformes, apresentando um melhor progn\u00f3stico em crian\u00e7as e maior agressividade em adultos. Outros subtipos menos comuns s\u00e3o o alveolar e pleom\u00f3rfico, esse \u00faltimo observado apenas em adultos.<\/p>\n\n\n\n
Quanto \u00e0 localiza\u00e7\u00e3o na cabe\u00e7a e pesco\u00e7o, os orbitais representam o principal s\u00edtio, sendo tamb\u00e9m os de melhor progn\u00f3stico. Os paramen\u00edngeos, em contrapartida, s\u00e3o os de pior progn\u00f3stico, com cerca de 60 a 70% de sobrevida em cinco anos. Os de localiza\u00e7\u00e3o paraman\u00edngea com origem no osso temporal s\u00e3o raros, cerca de 7% dos rabdomiossarcomas da cabe\u00e7a e pesco\u00e7o, e tipicamente manifestam-se como quadros de otomastoidite cr\u00f4nica, como no caso relatado. <\/p>\n\n\n\n