Kronik piyelonefrit ve postenfeksiyöz skar

Özet

Vezikoüreteral reflü, renal skar ve böbrek boyutu ile işlevinde azalmayla ilişkili olabilir. BT ve MR, kronik piyelonefritin görüntüleme bulgularının değerlendirilmesinde kullanılabilir. Renal kontur bozukluğunda gelişimsel ve tümör dışı lezyonlar malign tümörü taklit edebilir; görüntüleme ile ayırım gereksiz girişimleri önlemeye yardımcı olur. Bulgular klinik öyküyle birlikte yorumlanır.

Faz ve pencere

Gecikmiş tanısal

Kronik piyelonefritin görüntüleme bulguları BT veya MR ile değerlendirilebilir.

Nefrografik

BT ve MR, akut ve kronik piyelonefritin görüntüleme bulgularının değerlendirilmesinde kullanılabilir.

BT bulguları

• Kortikal incelme kronik yapısal hasarı yansıtabilir.
• DMSA renal sintigrafisi, renal korteksi görüntüleyerek skar alanlarını gösterebilir.
• Vezikoüreteral reflüde, yüksek dereceli VUR'u olan çocuklarda VUR veya intrarenal reflüsü olmayanlara kıyasla DMSA'da daha fazla renal skar saptanmıştır.
• İleri derecede tutulumda böbrek hacminde azalma ve parankim incelmesi gözlenebilir; karşı taraftaki kompansatuvar değişiklikler değerlendirilmelidir.
• Kortikal incelme kronik yapısal hasarı yansıtabilir; akut piyelonefritte ise azalmış lokal perfüzyon alanları görülebilir.

Normalde

Normal böbrekte korteks kalınlığı ve dış kontur düzenli olmalı; kaliksiyel yapılar simetrik ve dallanmış görünümde değerlendirilmelidir. İki böbrek karşılaştırılırken kortikal çentiklerin anatomik ilişkileri ve hacim dengesi incelenmeli; fetal lobülasyon gibi normal varyantlar skarlı yapılardan ayrıştırılmalıdır. Fetal lobülasyon, böbrekte fokal patolojiyi taklit edebilen anatomik varyantlardan biridir.

Ayırıcı tanı

Persistan fetal lobülasyon, ultrasonografide fokal renal patolojiyi veya tümörü taklit edebilen bir anatomik varyanttır.

Renal infarktların görüntüleme değerlendirmesinde böbrek bulguları, klinik-radyolojik ipuçları ve olası ayırıcı tanılar birlikte ele alınmalıdır. Renal infarktların görüntüleme değerlendirmesinde klinik ve radyolojik ipuçları dikkate alınmalıdır.

Yüksek dereceli vezikoüreteral reflüsü olan çocuklarda, reflüsü veya intrarenal reflüsü olmayanlara kıyasla DMSA'da daha fazla renal skar saptanmıştır.

Akut piyelonefritte azalmış renal perfüzyon alanları görülebilir; kortikal incelme ise kronik yapısal hasarı yansıtabilir.

Renal kitlelerin BT ile karakterizasyonunda kontrastlanma değerlendirilir.

Tuzaklar

• Fetal lobülasyon, ultrasonografide fokal renal patolojiyi veya tümörü taklit edebilen bir anatomik varyanttır.
• Renal infarktların değerlendirilmesinde uygun görüntüleme tekniğini kullanın ve klinik-radyolojik ipuçlarını dikkate alın.
• Yüksek dereceli vezikoüreteral reflüsü olan çocuklarda DMSA'da daha fazla renal skar saptanmıştır.
• Kortikal incelme kronik yapısal hasarı yansıtabilir; altta yatan patolojik alt tipi tek başına belirlemez.

Kendini dene

1. Renal görüntülemede kortikal incelme en çok neyi yansıtır?

   • Kronik yapısal hasarı; özgül patolojik alt tipi göstermez
   • Altta yatan hastalığın özgül patolojik alt tipini
   • Akut enfeksiyonu tek başına
   • Korteks kalınlığının normal olduğunu
   Cevabı göster

   Kronik yapısal hasarı; özgül patolojik alt tipi göstermez. Kortikal incelme kronik yapısal hasarı yansıtır; altta yatan patolojik alt tipi belirlemez.

2. Yüksek dereceli vezikoüreteral reflüsü olan çocuklarda, VUR veya intrarenal reflüsü olmayanlara kıyasla hangi bulgu daha fazlaydı?

   • VUR veya intrarenal reflüsü olmayanlarda DMSA skarı
   • Yüksek dereceli VUR grubunda DMSA skarı
   • Yüksek dereceli VUR grubunda hiç DMSA skarı görülmemesi
   • Gruplar arasında DMSA skarı açısından fark olmaması
   Cevabı göster

   Yüksek dereceli VUR grubunda DMSA skarı. Çalışmada yüksek dereceli VUR grubunda, VUR veya intrarenal reflüsü olmayan gruba kıyasla daha fazla DMSA skarı saptandı.

İlgili konular

• Akut piyelonefrit
• Renal ve perinefrik apse
• Ksantogranülomatöz piyelonefrit

Kaynaklar

Bu sayfadaki 33 cümle ve 2 quiz sorusu aşağıdaki kaynaklardan alıntılarla otomatik olarak karşılaştırıldı; 28 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.