Özet
Gerçek Candida pnömonisi nadirdir; genellikle ağır immün baskılanma ve hematolojik yayılım bağlamında düşünülür, solunum yolu örneğinde Candida üremesi çoğunlukla kolonizasyonu gösterir. Toraks BT'de çoklu nodüller, multifokal konsolidasyon, buzlu cam opasiteleri ve bazen halo görülebilir; bu bulgular Candida'ya özgü değildir ve diğer fungal hastalıklarla örtüşebilir. Karaciğer ve dalak lezyonları hepatosplenik kandidiyazın görüntüleme değerlendirmesinde saptanabilir; akciğer görüntüleme bulguları tek başına etkeni doğrulamaz. Candida'nın solunum örneğinde saptanması kolonizasyon ile enfeksiyon ayrımını güçleştirebilir; kandidiyazın yanlış tanınması tanıda gecikmeye yol açabilir.
Faz ve pencere
- HRCT tanısal
- İnce kesit toraks BT'de çoklu nodüller, multifokal konsolidasyon ve buzlu cam opasiteleri görülebilir; nodüllere bazen halo veya kavite eşlik eder ve bu paternler Candida için özgül değildir.
Önerilen pencereler: Akciğer (G 1500 / M -600), Mediasten (G 350 / M 50).
BT bulguları
- Hematojen yayılımda birden fazla pulmoner nodül görülebilir; milier patern daha seyrektir.
- Pulmoner kandidiyazda nodüllere buzlu cam halosu eşlik edebilir; bu görünüm fungal enfeksiyonlarda tek başına tanısal değildir.
- Pulmoner kandidiyazda lobar veya multifokal konsolidasyonlar görülebilir.
- Bronş çevresindeki akciğer dokusu ve interstisyumda bulutumsu veya retiküler eksüdatif opasiteler ya da konsolidasyonlar görülebilir.
- Ağır immün baskılanmış hastada plevral sıvı ya da nadiren kaviter nodül
- Karaciğer ve dalak lezyonları, hepatosplenik kandidiyaz değerlendirmesinde görüntülemeyle saptanabilir.
- Pulmoner kandidiyazda nodüller ve konsolidasyon görülebilir; bu bulgular tek başına fungal etkeni belirlemez.
- Pulmoner kandidiyazda BT bulguları değişken olabilir ve görüntüleme tek başına etkeni doğrulamaz.
Normalde
Normal akciğer parankiminde BT'de anormallik izlenmez. Şüpheli kesitte nodüllerin boyut, yoğunluk, yerleşim ve sınır özelliklerini, ayrıca eşlik eden akciğer dışı bulguları değerlendir.
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
- İnvaziv aspergillozda nodüller ve halo görülebilir; bu bulgular fungal enfeksiyonlar arasında tek başına özgül ayrım sağlamaz.
- Pulmoner mukormikozda konsolidasyon görülebilir; görüntüleme bulguları invaziv aspergillozla örtüşebilir.
- Septik pulmoner emboli
- periferik nodüller, kama biçimli opasite ve kaviteyle ortaya çıkabilir; enfekte kateter/sağ kalp odağı araştırılır.
- Bakteriyel bronkopnömoni
- bilateral yamalı konsolidasyon ve sentrilobüler küçük nodüller yapar; hava yolu merkezli dağılım belirgin olabilir.
- Viral pnömonide görüntüleme bulguları diğer enfeksiyonlarla örtüşebilir; görüntüleme bulguları tek başına etkeni belirlemez.
Tuzaklar
- Endotrakeal aspirat veya balgamda Candida üremesi akciğer invazyonunu kanıtlamaz; bu örnekler çoğunlukla hava yolu kolonizasyonunu yansıtır.
- Halo ya da çoklu nodül Candida'ya özgü değildir; görüntüleme, invaziv enfeksiyon tanısını tek başına doğrulayamaz.
- Gerçek kandidal pnömoni nadirdir ve çoğunlukla ağır immün baskılanma/yayılım bağlamındadır; alternatif etkenleri ve eşlik eden organ tutulumunu araştır.
Kendini dene
BAL örneğinde Candida üremesi, tek başına Candida pnömonisini kanıtlar mı?
Cevabı göster
Pnömoniyi kanıtlamaz. Solunum örneklerinde Candida üremesinin özgüllüğü düşüktür ve çoğunlukla kolonizasyon ya da kontaminasyon olarak yorumlanır; tanı, doku biyopsisinde fungal invazyon gösterilmesine dayanır.
Ağır nötropenide çoklu pulmoner nodüller ve bazılarında halo var. Bu BT örüntüsü tek başına Candida tanısını doğrular mı?
Cevabı göster
Olası ama özgül değil. Nodül ve halo fungal enfeksiyonlarda görülebilir; bu görünüm Candida'ya özgü değildir. BT bulguları etkeni kesinleştirmez; pulmoner kandidiyaz tanısı için doku biyopsisinde fungal invazyon gösterilmesi gerekir.
Kaynaklar
Bu sayfadaki 34 cümle ve 2 quiz sorusu aşağıdaki kaynaklardan alıntılarla otomatik olarak karşılaştırıldı; 26 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.