Skarlaşma (sikatrizasyon) atelektazisi BT bulguları

Özet

Önceden geçirilmiş enfeksiyon, radyasyon veya kronik interstisyel hasar sonrasında gelişen fibrotik çekinti, akciğer parankimini kalıcı olarak büzüştürüp komşu bronş ve damarları deforme edebilir. BT, skar dokusunun dağılımını ve eşlik eden traksiyon bronşektazisini göstererek basit havalanma kaybından ayrımına yardım eder. Fokal skar benzeri opasitenin arkasında bronş tıkanıklığı ya da kitle bulunması da mümkündür. Hacim kaybını ve mimari bozulmayı tanımamak, kronik fibrozisi akut konsolidasyon veya tümöral çökme olarak yanlış yorumlatabilir.

Faz ve pencere

Kontrastsız tanısal: İnce kesit BT, skarlaşma atelektazisini ve eşlik eden traksiyon bronşektazisini değerlendirmede kullanılabilir.
HRCT tanısal: İnce kesit inspiryum görüntüleri retiküler çizgilenmeyi, düzensiz intralobüler çizgileri ve traksiyonla genişlemiş bronşları ortaya koyar.

Önerilen pencereler: Akciğer (G 1500 / M -600), Mediasten (G 350 / M 50).

BT bulguları

Lokal hacim kaybı — skarlı lob veya segmentte parankim büzüşmesi, fissürün lezyona doğru yer değiştirmesiyle birlikte görülür.
Sikatrizasyon atelektazisine parankimal skarlaşma ve traksiyon bronşektazisi eşlik edebilir.
Plevroparankimal çekinti — plevra ve subplevral alanda yoğun fibrozis görülebilir.
Traksiyon bronşektazisi — fibrotik parankim içinde düzensiz genişlemiş bronşlar ve normal kalibreye doğru daralmayan dallar izlenir.
Retiküler fibrozis — birbirine bağlanan ince çizgiler ve düzensiz intralobüler opasiteler skarlı alanı belirginleştirir.
Komşu lobda kompansatuvar havalanma — çekilmiş bölgenin yanında kalan akciğer parankimi daha geniş ve düşük atenüasyonlu görünebilir.
Sikatrizasyon atelektazisi, traksiyon bronşektazisiyle birlikte görülebilir.

Normalde

Skarlaşmış akciğer alanında parankimal skarlaşma ve buna eşlik edebilen traksiyon bronşektazisi görülebilir.

Normal BT ile kıyasla

Aynı bölgenin, kaynak veri setinde patoloji içermediği belirtilen bir BT incelemesini kesit kesit kaydırın; organ sınırlarını açarak anatomiyi hasta görüntüsüyle karşılaştırın. Küçük rastlantısal bulgular tümüyle dışlanmamıştır.

Kaynak: TotalSegmentator v2.01 veri seti (Wasserthal ve ark., Radiology: Artificial Intelligence 2023), CC BY 4.0, vaka s1278; organ sınırları veri setinin otomatik segmentasyonundan, birleştirilerek sadeleştirildi. Görüntüler 2,5 mm kesit aralığına yeniden örneklendi.

Ayırıcı tanı

Akut enfeksiyöz pnömoni, lober, bronkopnömonik veya interstisyel dağılımlı opasitelerle görülebilir.
Obstrüktif atelektazi: bronşta ani kesilme ve distal hacim kaybı görülür; skarlaşma atelektazisinde çekinti bronş çevresindeki fibrotik mimariyle birliktedir.
Yuvarlak atelektazi: kitle benzeri opasiteye bronkovasküler yapıların birleşerek oluşturduğu kuyruk benzeri görünüm eşlik edebilir.
İdiyopatik pulmoner fibrozis: bazal ve subplevral retikülasyon, bal peteği ve iki taraflı traksiyon bronşektazisi daha yaygın interstisyel dağılım oluşturur.
Akciğer tümörü: spiküle yumuşak doku odağı, bronş kesilmesi veya seri incelemelerde büyüme skar görünümünden kuşkulandırır.

Tuzaklar

Supin hastada yalnız posterior bazalde görülen silik çizgilenme bağımlı havalanma kaybı ile ilişkili olabilir; pozisyonel değişkenliğin değerlendirilmesi faydalı olabilir.
Eski tüberküloz veya radyasyon alanındaki yoğun skar, kitleyi maskeleyebilir; bronş açıklığını ve skarın içindeki yeni nodüler bileşeni ayrı izleyin.
Traksiyon bronşektazisi tek başına sikatrizasyon atelektazisi demek değildir; eşlik eden retikülasyon, mimari bozulma ve bölgesel hacim kaybını arayın.
Sikatrizasyon atelektazisine parankimal skarlaşma ve traksiyon bronşektazisi eşlik edebilir.

Kendini dene

Olgu raporunda sağ üst lobdaki sikatrizasyon atelektazisine hangi bronş bulgusu eşlik etmiştir?
Cevabı göster
Silindirik ve traksiyon bronşektazisi. Olgu raporunda sağ üst lobda sikatrizasyon atelektazisiyle birlikte silindirik ve traksiyon bronşektazisi bildirilmiştir.
Kronik granülomatöz hastalıkta parankimal skarlaşmaya hangi hava yolu bulgusu eşlik edebilir?
Cevabı göster
Traksiyon bronşektazisi. Kaynak, kronik granülomatöz hastalıkta parankimal skarlaşmayla traksiyon bronşektazisinin birlikte görülebildiğini bildiriyor.

İlgili konular

Atelektazi yaygınlığı ve lobar kollaps

Kaynaklar

Bu sayfadaki 32 cümle ve 2 quiz sorusu aşağıdaki kaynaklardan alıntılarla otomatik olarak karşılaştırıldı; 11 cümle bu karşılaştırmada düzeltildi (2026-10-09).

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Eğitim amaçlıdır; hasta başında tanı ve tedavi kararının yerine geçmez, tıbbi tavsiye değildir. Metinler yapay zekâ desteğiyle yazıldı ve otomatik bir adımda kaynak alıntılarıyla karşılaştırıldı; bu bir tıbbi doğrulama değildir ve içerik uzman radyolog incelemesinden geçmedi. Klinik kararlarda güncel kılavuzları, kurum protokollerini ve radyoloji raporunu esas alın.