Kronik kolesistit BT bulguları

Özet

Kronik kolesistit, tekrarlayan inflamasyon ve çoğunlukla safra taşlarının oluşturduğu uzun süreli duvar fibrozisiyle ilişkili bir safra kesesi hastalığıdır. BT'de kese genellikle kollabe veya kontrakte olup, duvar kalınlaşması ve fibrotik değişiklikler görülebilir; ancak kesin ayırıcı tanı için çoklu görüntüleme bulguları gerekir. Akut inflamasyonun eşlik edip etmediğini anlamak için kese distansiyonu, belirgin duvar ödemi, perikolesistik sıvı ve komşu karaciğer hiperemisi gibi bulguların birlikteliği değerlendirilir. Kontrakte fibrotik kesenin kitle ya da akut kolesistit sanılması gereksiz alarm yaratabilir; eşlik eden yeni inflamasyon veya malignite kuşkusu da gözden kaçmamalıdır.

Faz ve pencere

Portal tanısal: Küçük veya kollabe kesede fibrotik duvar kalınlaşması, zayıf-düzgün iç duvar kontrastlanması ve ince hipodens dış tabaka görülebilir; taşlar, kese çevresi reaksiyon ve akut komplikasyon bulguları birlikte incelenir.
Kontrastsız: Kalsifiye duvar ve kalsifiye taşlar gösterilebilir; lümen kontrast maddeyle dolmadığı için duvar tabakalanması ve komşu karaciğerde hiperemi değerlendirilemez.

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

BT bulguları

Küçük, kollabe veya belirgin kontrakte safra kesesi; lümen taşlarla dolu olabilir
Fibrozise bağlı düzensiz ya da yaygın duvar kalınlaşması ve zayıf iç duvar kontrastlanması
Duvar kalınlaşmasında iç ve dış tabakaların korunmuş olması ve zayıf kontrastlanma bulgusu kronik kolesistiti destekler.
Kese boynu veya sistik kanal ağzında lümeni tıkayan kalkülüs
Belirgin akut çevre yağ dokusu inflamasyonu ve perikolesistik sıvının genellikle olmaması
İleri kronik değişiklikte kese duvarı boyunca kalsifikasyon; lümendeki kalsifiye taşlardan ayrı izlenir

Normalde

Normal safra kesesi, uygun distansiyonda düzgün konturlu ve ince duvarlıdır; lümeninde taş, duvarında kalsifikasyon veya çevre yağda bulanıklık yoktur. Kronik değişiklik için normal referansla kıyaslarken kese hacminin küçülmesine, duvarın fibrotik kalınlığına, taşların lümen ya da boyundaki konumuna ve çevrede akut inflamasyon bulunup bulunmadığına bak.

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 s0541; organ sınırları veri setinin otomatik segmentasyonundan, birleştirilerek sadeleştirildi. Görüntüler 2,5 mm kesit aralığına yeniden örneklendi.

Ayırıcı tanı

Akut kolesistit: kese distansiyonu, belirgin duvar ödemi veya çizgilenmesi, perikolesistik sıvı ve karaciğer yatağında reaktif hiperemi daha olasıdır.
Safra kesesi karsinomu: düzensiz, asimetrik veya nodüler solid duvar kalınlaşması, mukozal bozulma ya da karaciğer invazyonu kuşku uyandırır.
Porselen safra kesesi: lümen çevresindeki taşlardan farklı olarak duvarı izleyen yaygın veya parçalı mural kalsifikasyon vardır.
Adenomiyomatozis: fokal veya segmental duvar kalınlaşması içinde küçük intramural kistik sinüsler ve rosary görünümü bulunabilir.

Tuzaklar

Yemek sonrası kontrakte kese fizyolojik olabilir; küçük kese tek başına kronik kolesistit tanısı koydurmaz. Taş, fibrotik duvar değişikliği ve önceki incelemelerde kalıcılık birlikte değerlendirilmelidir.
Bulguların güvenilir yorumlanması için kese duvarının katman yapısı, kontrastlanma deseni ve mukozal bütünlüğünün dikkatlice incelenmesi esastır; kalsifiye taşlar BT'de hiperdens olarak görünüp duvarı örtse bile duvar patolojileri bu çok boyutlu değerlendirmelerle ayrıştırılmalıdır.
Kronik inflamasyondaki fibrozis ve çevre yapışıklıklar BT'de kanser invazyonunu taklit edebilir; fokal mukozal düzensizlik ve gerçek karaciğer parankim invazyonu varsa malignite ayırıcı tanıda kalır.

Kendini dene

BT'de küçük kontrakte kese, çok sayıda taş ve fibrotik görünümlü duvar var; belirgin çevre sıvı yok. En olası tanı nedir?
Cevabı göster
Kronik kolesistit. Kontrakte taşlı kese ve fibrotik duvar, çevre akut inflamasyon bulguları olmadan kronik kolesistiti destekler. Akut kolesistitte distansiyon ve çevresel inflamasyon daha beklenir; diğerleri bu tipik bütün görünümü tek başına açıklamaz.
Taşlı kontrakte kesede duvarın bir bölümü yaygın kalsifiye; bu görünüm neyi düşündürür?
Cevabı göster
Porselen safra kesesi. Duvar boyunca mural kalsifikasyon kronik kolesistitin son dönem görünümü olan porselen safra kesesini düşündürür. Adenomiyomatoziste kalınlaşmış safra kesesi duvarı içinde küçük kistik boşluklar görülebilir.

Kaynaklar

Bu sayfadaki 34 cümle ve 2 quiz sorusu aşağıdaki kaynaklardan alıntılarla tek tek karşılaştırıldı; 5 cümle bu karşılaştırmada düzeltildi (2026-10-08).

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