Yumuşak doku apsesi

Özet

Yumuşak doku apsesi, deri altı ya da daha derin dokuda sınırlı pürülan koleksiyondur ve enfeksiyon, travma veya yabancı cisim çevresinde gelişebilir. IV kontrastlı BT, koleksiyonun sıvı merkezini ve çevresel duvarını gösterirken derin boşluklara, kaslara ve komşu kemiklere uzanımı ortaya koyar. BT, odaksal sıvı koleksiyonunu ve çevre inflamasyonu değerlendirir; tanı klinik bulgularla desteklenmelidir. Derin uzanımın veya çevre dokudaki komplikasyonun atlanması enfeksiyonun kapsamını eksik gösterir.

Faz ve pencere

Venöz tanısal

IV kontrastlı BT'de apse, çevresel kontrastlanan duvarı olan ve merkezinde sıvı yoğunluklu sınırlı koleksiyonu gösteren odaksal lezyon olarak değerlendirilir.

Önerilen pencereler: Yumuşak doku (G 400 / M 40), Kemik (G 1800 / M 400).

BT bulguları

• Subkutan yağ, fasya aralığı veya kas içinde çevre dokudan ayrılan odaksal sıvı koleksiyonu.
• Koleksiyon merkezinde çoğunlukla çevre kas/yağdan düşük atenüasyon ve periferinde kontrastlanan inflamatuvar duvar.
• Düzgün ya da düzensiz kenarlı duvar; olgunlaşmamış koleksiyonda ince veya kesintili kontrastlanma görülebilir.
• Koleksiyon çevresinde yağ çizgilenmesi, cilt kalınlaşması ve retiküler subkutan ödem.
• Koleksiyon içinde gaz veya hava-sıvı seviyesi; gaz üreten enfeksiyon ya da deriyle açık bağlantı bağlamında yorumlanır.
• Derin fasyaya, kas kompartımanına, komşu ekleme veya kemiğe uzanım ve bası etkisi.
• Odaksal sıvı koleksiyonu olarak görünür; direkt inoculasyon veya yabancı cisim çevresinde gelişebilir.

Normalde

Normal cilt altı yağ lobülleri homojen ve simetriktir; fasya ve kas planları arasında sıvı yoğunluklu odak ya da çevresel kontrastlanan duvar bulunmaz. Karşı taraftaki aynı anatomik kompartımanla kıyaslayarak koleksiyon merkezini, çevre inflamasyonunu ve kas-fasya sınırlarının korunup korunmadığını değerlendirin.

Ayırıcı tanı

Koleksiyon oluşturmamış yaygın yumuşak doku enfeksiyonu (eski kullanımda flegmon)

belirgin sıvı merkezi ve sınırlı apse duvarı yoktur; tutulan bölgeye göre selülit, miyozit veya fasiit olarak adlandırılır.

Nekrotizan fasiit

odaksal koleksiyondan bağımsız olarak derin fasya boyunca sıvı, kalınlaşma, kontrastlanma kaybı veya gaz uzanımı aranır.

Kronik genişleyen hematomlarda periferik kontrastlanma görülebilir; bu özellik tek başına hematomu apseden ayırt ettirmez.

Nekrotik tümörler ve lenfadenopati, apseye benzer şekilde periferik kontrastlanma gösterebilir; solid bileşen ve nodal zincir ilişkisi malignite lehine değerlendirilir.

Epidermoid kist yavaş büyüyen, cildi kabartan bir kitle olarak görülebilir ve sıklıkla pilosebase folikül ağzını temsil eden santral punktum içerir.

Tuzaklar

• Kronik genişleyen hematomlarda da periferik kontrastlanma görülebilir; bu bulgu tek başına apseyi kanıtlamaz.
• Olgunlaşmamış apse henüz belirgin duvar oluşturmamış olabilir; flegmonla ayrımda odaksal sıvı merkezinin gerçekten bulunup bulunmadığını kontrol edin.
• Yumuşak doku apsesi kontrastlı BT'de çevresel kontrastlanan sıvı koleksiyonu olarak görülebilir; cilt kalınlaşması ve çevre yağda çizgilenme eşlik edebilir.
• Yumuşak doku enfeksiyonlarında gaz varlığı özgül olsa da erken evrede veya gaz üretmeyen organizmalarda bulunmayabilir; gaz yokluğu hastalığı ekarte etmez.

Kendini dene

1. Alt bacağın posterior subkutan dokusunda ağrılı şişlik, çevre yağ çizgilenmesi ve kontrastlanan duvarla çevrili düşük atenüasyonlu merkez görülüyor. En olası tanı nedir?

   • Yumuşak doku apsesi
   • Koleksiyonsuz yaygın enfeksiyon
   • Hematom
   • Nekrotik tümör
   Cevabı göster

   Yumuşak doku apsesi. Odaksal sıvı merkezinin çevresel kontrastlanan duvarı ve komşu inflamatuvar değişiklikler yumuşak doku apsesini destekler. Koleksiyon oluşturmamış enfeksiyonda sınırlı sıvı merkezi yoktur; hematom travma/kanama bağlamıyla, nekrotik tümör ise solid nodüler bileşen ve klinik öyküyle değerlendirilir.

2. Alt bacakta cilt kalınlaşması ve yaygın subkutan yağ çizgilenmesi var; belirgin sıvı merkezi veya sınırlı apse duvarı görülmüyor. En uygun yorum hangisidir?

   • Selülit, koleksiyon yok
   • Olgun yumuşak doku apsesi
   • Epidermal kist
   • Hematom
   Cevabı göster

   Selülit, koleksiyon yok. Cilt kalınlaşması ve subkutan yağda yaygın çizgilenme, odaksal koleksiyon olmadan selüliti destekler. Apse için sınırlı sıvı merkezi beklenir; epidermal kist daha fokal ve dermal bağlantılıdır, hematomda ise kanama öyküsü ve içerik atenüasyonu dikkate alınır.

İlgili konular

• Selülit ve flegmon
• Nekrotizan fasiit
• Yumuşak dokuda yabancı cisim

Kaynaklar

Bu sayfadaki 36 cümle ve 2 quiz sorusu aşağıdaki kaynaklardan alıntılarla otomatik olarak karşılaştırıldı; 9 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.