Bronşektazi
Özet
Bronşektazi, normal konak savunmasının bozulması ve mukosiliyer temizliğin aksaması sonucu akciğerin orta ve küçük hava yollarının kalıcı ve anormal şekilde genişlemesidir. Hastalık gelişiminde, bakteriyel ve viral patojenlerin kalıcılığı ile polimorfonükleer lökositlerden salınan proteaz enzimlerinin neden olduğu ve bronş duvarı yapılarını yıkan kısır bir inflamatuar döngü etkindir. Olguların %25-40'ı idiyopatik olup kistik fibrozis ve Kartagener sendromu gibi konjenital nedenlerin yanı sıra tedavi edilmemiş çocukluk çağı enfeksiyonları, yabancı cisim aspirasyonları ve tümörler gibi edinsel faktörler de etiyolojide önemli rol oynar. Morfolojik olarak silindirik, variköz ve kistik olmak üzere üç tipte sınıflandırılır. En sık görülen semptomlar kronik mukopürülan öksürük, yoğun balgam üretimi, hemoptizi ve nefes darlığıdır. Tanıda altın standart yüksek çözünürlüklü bilgisayarlı tomografidir (BT); taşlı yüzük ve tramvay yolu gibi patognomonik işaretler tanıyı doğrular. Tedavi yaklaşımı öncelikle enfeksiyonu kontrol altına almaya, hava yolu temizliğini ve sekresyon atımını mukoaktif ilaçlarla optimize etmeye yönelik medikal tedaviyi kapsar. Medikal tedaviye yanıtsız, lokalize ve kistik formdaki uygun hastalarda ise hastalıklı alanın anatomik rezeksiyonunu (lobektomi, segmentektomi) içeren cerrahi tedavi tercih edilir.
Bronchiectasis is a permanent and abnormal dilation of the lungs' medium and small airways, primarily resulting from impaired host defense mechanisms and disrupted mucociliary clearance. The pathophysiology involves a vicious inflammatory cycle driven by persistent bacterial and viral pathogens, which trigger the release of protease enzymes from polymorphonuclear leukocytes, subsequently destroying the structural components of the bronchial wall. Approximately 25-40% of cases are idiopathic; however, congenital conditions like cystic fibrosis and Kartagener syndrome, along with acquired factors such as untreated childhood infections, foreign body aspirations, and bronchial obstructions, play significant roles in its etiology. Morfolonogically categorized into cylindrical, varicose, and cystic types, its hallmark clinical manifestations include chronic mucopurulent cough, copious sputum production, hemoptysis, and dyspnea. High-resolution computed tomography (CT) stands as the gold standard for diagnostic confirmation, revealing pathognomonic findings such as the signet ring sign and tram track appearance. Management relies foremost on medical therapy aimed at controlling bronchopulmonary infections and optimizing airway clearance using various mucoactive drugs. In localized, symptomatic, or cystic cases refractory to medical interventions, surgical treatment through anatomical resections like lobectomy or segmentectomy is performed to eradicate the infectious foci.
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