{"id":12796,"date":"2025-07-31T10:49:47","date_gmt":"2025-07-31T14:49:47","guid":{"rendered":"https:\/\/www.rigicon.com\/glossary-term\/meatal-stenosis\/"},"modified":"2025-07-31T10:49:47","modified_gmt":"2025-07-31T14:49:47","slug":"estenose-meatal","status":"publish","type":"glossary-term","link":"https:\/\/www.rigicon.com\/pt-br\/glossary-term\/estenose-meatal\/","title":{"rendered":"Estenose Meatal"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"","protected":false},"featured_media":0,"template":"","glossary-category":[126],"glossary-product":[],"class_list":["post-12796","glossary-term","type-glossary-term","status-publish","hentry","glossary-category-urological-conditions"],"acf":{"gt-definition":"

A estenose meatal \u00e9 uma condi\u00e7\u00e3o urol\u00f3gica caracterizada por um estreitamento anormal da abertura uretral (meato) na ponta do p\u00eanis, restringindo o fluxo de urina.1<\/sup> Esta anomalia estrutural pode ser cong\u00eanita (presente no nascimento), mas \u00e9 mais comumente adquirida, particularmente como uma complica\u00e7\u00e3o ap\u00f3s a circuncis\u00e3o.2<\/sup> O termo \"estenose\" refere-se ao estreitamento patol\u00f3gico de uma passagem no corpo, neste caso afetando a parte externa meato uretral.3<\/sup> Esse estreitamento cria maior resist\u00eancia ao fluxo de urina, levando \u00e0 altera\u00e7\u00e3o da din\u00e2mica do jato urin\u00e1rio e aos sintomas associados. A estenose meatal ocorre em aproximadamente 8-10% dos homens em todo o mundo, com preval\u00eancia significativamente maior em indiv\u00edduos circuncidados versus n\u00e3o circuncidados.4<\/sup> A condi\u00e7\u00e3o normalmente se desenvolve entre 3 e 7 anos de idade quando adquirida, embora possa afetar indiv\u00edduos de qualquer idade.5<\/sup> A fisiopatologia envolve inflama\u00e7\u00e3o e cicatrizes subsequentes do tecido meatal, muitas vezes desencadeadas pela exposi\u00e7\u00e3o a irritantes, trauma mec\u00e2nico ou altera\u00e7\u00f5es isqu\u00eamicas no uretra distal.6<\/sup><\/p>\n

A estenose meatal \u00e9 o estreitamento do meato uretral externo, a abertura da uretra na ponta do p\u00eanis. As causas incluem balanite xer\u00f3tica obliterante (BXO\/l\u00edquen escleroso), circuncis\u00e3o pr\u00e9via (especialmente em crian\u00e7as), trauma uretral, instrumenta\u00e7\u00e3o repetida e inflama\u00e7\u00e3o cr\u00f4nica. \u00c9 mais comum em homens circuncidados, onde a exposi\u00e7\u00e3o constante do meato a roupas \u00edntimas pode causar irrita\u00e7\u00e3o cr\u00f4nica e fibrose.<\/p>","gt-synonyms":"Estenose meatal uretral, Estenose meatal, Estenose uretral externa, Obstru\u00e7\u00e3o da sa\u00edda uretral, Meato pontual","gt-citation":"[1] Van Howe RS. Incidence of meatal stenosis following neonatal circumcision in a primary care setting. Clin Pediatr (Phila). 2006;45(1):49\u201354. DOI: 10.1177\/000992280604500108\n\n[2] Morris BJ, Krieger JN. Does Circumcision Increase Meatal Stenosis Risk?-A Systematic Review and Meta-analysis. Urology. 2017 Dec;110:16-26. DOI: 10.1016\/j.urology.2017.07.027\n\n[3] Wang MH. Surgical Management of Meatal Stenosis with Meatoplasty. J Vis Exp. 2010 Nov 30;(45):2213. DOI: 10.3791\/2213\n\n[4] Persad R, Sharma S, McTavish J. Clinical presentation and pathophysiology of meatal stenosis following circumcision. Br J Urol. 1995;75(1):91\u201393. DOI: 10.1111\/j.1464-410x.1995.tb07242.x\n\n[5] Abid AF, Hussein NS. Meatal stenosis posttraditional neonatal circumcision-cross-sectional study. Urol Ann. 2021 Jan-Mar;13(1):62-66. DOI: 10.4103\/UA.UA_30_20\n\n[6] Tiryaki S, Issi Y. The association of meatal stenosis and infant circumcision. Turk J Pediatr. 2023;65(4):661-666. DOI: 10.24953\/turkjped.2023.46","gt-clinical-context":"

A estenose meatal \u00e9 encontrada principalmente na pr\u00e1tica urol\u00f3gica pedi\u00e1trica, embora possa afetar homens de qualquer idade. A condi\u00e7\u00e3o \u00e9 diagnosticada com mais frequ\u00eancia em homens circuncidados, com estudos indicando que \u00e9 rara em indiv\u00edduos n\u00e3o circuncidados.1<\/sup> Os crit\u00e9rios de sele\u00e7\u00e3o de pacientes para interven\u00e7\u00e3o geralmente incluem apresenta\u00e7\u00e3o sintom\u00e1tica em vez de apenas achados anat\u00f4micos, pois existem varia\u00e7\u00f5es naturais na largura do meato.2<\/sup><\/p>\n

A etiologia mais comum em pacientes pedi\u00e1tricos \u00e9 a inflama\u00e7\u00e3o p\u00f3s-circuncis\u00e3o, onde a glande e o meato rec\u00e9m-expostos ficam irritados pelo contato da fralda ou pela exposi\u00e7\u00e3o a am\u00f4nia e cristais de \u00e1cido \u00farico na urina.3<\/sup> Em adultos, a estenose meatal pode resultar de instrumenta\u00e7\u00e3o uretral, cateterismo de longo prazo, l\u00edquen escleroso ou outras condi\u00e7\u00f5es inflamat\u00f3rias que afetam a uretra distal.4<\/sup><\/p>\n

A apresenta\u00e7\u00e3o cl\u00ednica normalmente inclui jato urin\u00e1rio desviado para cima e dif\u00edcil de direcionar, dis\u00faria (mic\u00e7\u00e3o dolorosa), frequ\u00eancia urin\u00e1ria, urg\u00eancia e, ocasionalmente, hemat\u00faria terminal (sangue no final da mic\u00e7\u00e3o).5<\/sup> O exame f\u00edsico revela uma abertura meatal pontiaguda ou estreitada, e a observa\u00e7\u00e3o da mic\u00e7\u00e3o geralmente demonstra um jato fino, \u00e0s vezes forte, com esvaziamento incompleto da bexiga.6<\/sup><\/p>\n

A avalia\u00e7\u00e3o diagn\u00f3stica \u00e9 principalmente cl\u00ednica, embora o exame de urina possa ser realizado para descartar infec\u00e7\u00e3o. Em casos com apresenta\u00e7\u00e3o mais complexa, estudos adicionais como urofluxometria ou ultrassonografia podem ser indicados para avaliar complica\u00e7\u00f5es do trato urin\u00e1rio superior.2<\/sup><\/p>\n

As op\u00e7\u00f5es de tratamento incluem:<\/p>\n

1. Meatotomia\/meatoplastia cir\u00fargica: A base do tratamento, envolvendo o alargamento cir\u00fargico da abertura meatal. Este procedimento ambulatorial tem alta taxa de sucesso e baixa recorr\u00eancia.3<\/sup><\/p>\n

2. Corticoterapia t\u00f3pica: Em casos mais leves, a aplica\u00e7\u00e3o de creme esteroide no meato duas vezes ao dia por at\u00e9 tr\u00eas meses pode proporcionar al\u00edvio suficiente.4<\/sup><\/p>\n

3. Dilata\u00e7\u00e3o meatal: Menos comumente empregada devido ao risco de cicatrizes e menores taxas de sucesso em compara\u00e7\u00e3o com abordagens cir\u00fargicas.5<\/sup><\/p>\n

Os resultados esperados ap\u00f3s interven\u00e7\u00e3o apropriada s\u00e3o excelentes, com a maioria dos pacientes apresentando resolu\u00e7\u00e3o completa dos sintomas e fun\u00e7\u00e3o urin\u00e1ria normal.6<\/sup> Sem tratamento, as complica\u00e7\u00f5es potenciais incluem infec\u00e7\u00f5es do trato urin\u00e1rio, esvaziamento incompleto da bexiga e, raramente, danos ao trato urin\u00e1rio superior por obstru\u00e7\u00e3o cr\u00f4nica.1<\/sup><\/p>\n

Os sintomas incluem jato urin\u00e1rio fino, desviado ou espalhado, gotejamento prolongado e esfor\u00e7o miccional. O diagn\u00f3stico \u00e9 cl\u00ednico, complementado por urofluxometria mostrando fluxo baixo com padr\u00e3o obstrutivo. O tratamento de primeira linha \u00e9 a meatoplastia ventral (incis\u00e3o e sutura em V-Y), com taxa de sucesso > 90%. Em casos associados a BXO, o uso de corticosteroides t\u00f3picos no p\u00f3s-operat\u00f3rio pode reduzir recorr\u00eancia.<\/p>","gt-related-evidence":null,"gt-featured":true,"gt-ai-referenced":false,"gt-view-count":76},"yoast_head":"\nEstenose Meatal: Estreitamento do Meato Urin\u00e1rio | Rigicon<\/title>\n<meta name=\"description\" content=\"Saiba sobre estenose meatal, estreitamento da abertura uretral externa. 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