Yuvarlak atelektazi ve fokal skar

Özet

Yuvarlak atelektazi, kronik plevral hastalıkla ilişkili periferik akciğer katlanmasıdır ve görüntüde kitleyi taklit edebilir. HRCT'de plevraya bitişik opasiteye kıvrılarak giren bronkovasküler yapılar, komşu plevral kalınlaşma ve lob hacim kaybı tanıyı destekler. İnce kesit BT, plevraya bitişik opasite ve bronkovasküler yakınsama gibi tanısal anatomik ilişkileri göstermede kullanılır. Yüksek FDG tutulumu veya imajing benzerliği nedeniyle yuvarlak atelektazi ile malignite ayırımı zor olabilir; patolojik doğrulama gerekebilir.

Faz ve pencere

HRCT tanısal

Plevraya komşu yuvarlak/oval yumuşak doku yoğunluklu opasite, kıvrılarak lezyona giren bronş ve damarlar, komşu plevral kalınlaşma ve lob hacim kaybı ince kesit akciğer algoritmasında değerlendirilir. Tanı, plevra tabanlı opasite ve bronkovasküler yakınsama gibi karakteristik ince kesit BT bulgularına dayanır.

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

BT bulguları

• Plevra tabanlı opasite — periferik, yuvarlak, oval veya merceksi yumuşak doku yoğunluğu; plevrayla akut açı yapar.
• Kuyruklu yıldız işareti — bronkovasküler yakınsamanın plevra tabanlı opasiteye uzanmasıyla oluşan görünümdür.
• Opasitenin komşuluğunda plevral skar veya kalınlaşma bulunur.
• Lob hacim kaybı — yuvarlak atelektazi, plevral yapışıklık nedeniyle oluşan atipik akciğer kolapsıdır.
• Bronkovasküler yakınsama — bronş ve damarların lezyona doğru yönelerek kuyruklu yıldız görünümü oluşturmasıdır.
• Plevral skar veya hastalığın komşuluğunda, alt loblarda sık görülen subpleural lokalizasyon.

Normalde

Lezyonun plevrayla ilişkisi ve bronkovasküler yapıların yönü tanısal değer taşır.

Ayırıcı tanı

Akciğer karsinomunda spiküle veya lobüle nodül konturları malignite şüphesini artırabilir; yuvarlak atelektaziden farklı olarak bronşun kesilmesinin beklendiği iddiası mevcut kaynaklarla doğrulanmıyor.

Yuvarlak atelektazinin ayırıcı tanısı güç olabilir; karakteristik görüntüleme bulguları varsa tanı genellikle daha az kuşkulu olur.

Yuvarlak atelektazinin ayırıcı tanısı güç olabilir; karakteristik görüntüleme bulguları varsa tanı genellikle daha az kuşkulu olur.

Yuvarlak atelektazinin ayırıcı tanısı güç olabilir; karakteristik görüntüleme bulguları varsa tanı genellikle daha az kuşkulu olur.

Yuvarlak atelektazinin ayırıcı tanısı güç olabilir; karakteristik görüntüleme bulguları varsa tanı genellikle daha az kuşkulu olur.

Tuzaklar

• Kuyruklu yıldız görünümü yuvarlak atelektazide görülebilir; bu BT görünümü yuvarlak atelektazi ile akciğer kanserini ayırmayı her zaman sağlamaz.
• Asbest ilişkili plevral plak eşlik etse bile plevral kalınlaşma tek başına yuvarlak atelektaziyi kanıtlamaz; kitle konturu, lob hacim kaybı ve kıvrılmış bronkovasküler yapılar birlikte bulunmalı.
• Akciğer kanserinde spikülasyon malignite şüphesini artırabilir; yuvarlak atelektazi ile akciğer kanserinin ayırıcı tanısı güç olabilir.
• Diğer atelektazi tipleri ile ayırımı klinik ve radyolojik bulgularla sağlanmalıdır.

Kendini dene

1. Alt lobdaki subplevral kitlede bronkovasküler yakınsama ve kuyruklu yıldız görünümü izleniyor. En olası tanı nedir?

   • Yuvarlak atelektazi
   • Periferik akciğer karsinomu
   • Pulmoner infarkt
   • Plevral tümör
   Cevabı göster

   Yuvarlak atelektazi. Subplevral kitlede bronkovasküler yakınsama ve kuyruklu yıldız görünümü yuvarlak atelektazide görülebilir; bu görünüm akciğer kanserinden ayrımı her zaman kesinleştirmez. Yuvarlak atelektazi ile akciğer kanserinin ayrımı güç olabilir; nodülde spikülasyon malignite şüphesini artırabilir.

2. Sol alt lobda plevral komşu kitlede yüksek 18F-FDG tutulumu ve bronkovasküler yakınsama mevcut; patolojide malignite saptanmamış. Tanı nedir?

   • Yuvarlak atelektazi
   • Akciğer kanseri
   • Pulmoner enfarktüs
   • Plevral mezotelyom
   Cevabı göster

   Yuvarlak atelektazi. Yuvarlak atelektazide yüksek 18F-FDG tutulumu görülebilir; bu olguda patolojide malignite saptanmamış ve bulgular yuvarlak atelektaziyle uyumlu bulunmuştur.

İlgili konular

• Pulmoner kitle

Kaynaklar

Bu sayfadaki 34 cümle ve 2 quiz sorusu aşağıdaki kaynaklardan alıntılarla otomatik olarak karşılaştırıldı; 25 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.