Akut nekrotik koleksiyon

Özet

ANC, nekrotizan pankreatitin erken döneminde pankreas içinde ve/veya çevresinde biriken sıvı ile nekrotik dokunun karışımıdır. BT’de heterojen içerik ve henüz olgun duvar bulunmaması, basit APFC’den ayırır. Dağılımı ve pankreatik kanal/komşu damarlarla ilişkisi girişimsel planlamayı etkiler. ANC’yi APFC veya olgun WON diye adlandırmak hastalığın zaman ve içerik bileşenini yanlış aktarır.

Faz ve pencere

Portal tanısal

Kontrastlı BT’de ANC heterojen, sıvı dışı yoğunlukta bileşenler içeren, belirgin duvarı olmayan ve pankreas içinde ve/veya dışında yerleşebilen bir oluşumdur; nekrotizan pankreatitte kontrastlanmayan pankreas alanları görülebilir.

Kontrastsız

Koleksiyon içi yüksek atenüasyonlu kan veya kaba debris görülebilir; canlı parankimle nekroz sınırını belirlemek için yeterli değildir.

Önerilen pencereler: Batın (G 400 / M 50), Karaciğer (G 150 / M 30).

BT bulguları

• İçeriği homojen olmayan, sıvı ve katı nekrotik materyal karışımı
• Olgun, iyi tanımlı çevresel kapsülün bulunmaması
• Pankreas parankimi içinde, peripankreatik alanda veya her ikisinde uzanım
• Nekroz pankreas parankiminde, peripankreatik dokuda veya her ikisinde bulunabilir; peripankreatik nekroz tek başına da görülebilir.
• Lesser sac, sol anterior pararenal alan, mezokolon veya retroperitona loküle/çoklu uzanım
• Komşu splenik damar basısı/trombozu; bağırsak fistülü veya girişim sonrası gaz olasılığı

Ölçütler ve sınıflamalar

ANC zaman tanımı

Nekrotizan pankreatit başlangıcından sonraki ilk 4 hafta

Revize Atlanta sınıflaması

İnterstisyel ödemli tipte pankreatik veya peripankreatik nekroz yoktur; nekrotizan tipte bunlardan biri veya ikisi bulunur. Koleksiyonlar pankreatit başlangıcından geçen süre, içerik ve duvar gelişimine göre APFC, psödokist, ANC veya WON olarak adlandırılır.

Revize Atlanta: ANC

Nekrotizan pankreatitle ilişkili, ilk 4 hafta içinde gelişen; değişen miktarda sıvı ve nekroz içeren, belirgin duvarı olmayan; pankreas içi ve/veya dışı koleksiyon.

Normalde

Aynı kesitte sıvının iç yapısını ve duvarın olgunlaşıp olgunlaşmadığını, pankreas içi uzanım ile çevre fasiyal yayılımı karşılaştır.

Ayırıcı tanı

APFC

homojen sıvı, duvar ve nekrotik debris yok; interstisyel ödemli tipte görülür.

WON

nekrotik içerik ANC’ye benzer ancak olgun iyi sınırlı duvar gelişmiştir.

Pankreatik hematom

kontrastsız BT’de hiperdens kan içeriği; klinik ve arteriyel fazda kanama/psödoanevrizma değerlendirilir.

Tuzaklar

• İlk 1-2 haftalarda her iki koleksiyon da katı komponent olmadan sıvı yoğunluğu gösterebildiğinden ayırıcı tanı yapmak zordur.
• Gaz saptanması enfeksiyon düşündürür fakat bağırsak fistülü veya önceki drenaj da aynı görünümü yapabilir.
• İlk 1–2 haftada ANC ile APFC’yi ayırmak zor olabilir; her ikisi de katı komponent olmadan sıvı yoğunluğunda görünebilir ve pankreatik parankim nekrozu varsa koleksiyon ANC olarak sınıflandırılır.

Kendini dene

1. Nekrotizan pankreatit başlangıcından erken dönemde duvarsız, heterojen sıvı-debris koleksiyonu saptanıyor. Tanım nedir?

   • ANC
   • APFC
   • Psödokist
   • WON
   Cevabı göster

   ANC. İlk haftalardaki nekrotizan pankreatit koleksiyonu, heterojen nekrotik içerik ve olgun duvar yokluğu ile ANC’dir.

2. İçeriği homojen sıvı, duvarı olmayan ve interstisyel ödemli pankreatit ile ilişkili koleksiyon hangisidir?

   • WON
   • ANC
   • APFC
   • Psödokist
   Cevabı göster

   APFC. Bu tarif APFC’dir; ANC heterojen nekrotik debris içerir, psödokist/WON olgun duvar taşır.

İlgili konular

• Duvarla çevrili nekroz (WON)
• Enfekte pankreatik nekroz

Kaynaklar

Bu sayfadaki 35 cümle ve 2 quiz sorusu aşağıdaki kaynaklardan alıntılarla otomatik olarak karşılaştırıldı; 6 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.