Özet
Spinal epidural apse, epidural aralıkta pürülan koleksiyon oluşmasıdır ve omurilik ya da kauda ekuina basısı nedeniyle zaman duyarlı bir tanıdır. BT spinal kanalda yer kaplayan bir lezyonu gösterebilir ancak niteliğini belirleyemeyebilir; epidural apseyi ve yayılımını değerlendirmede MR tercih edilen incelemedir. BT spinal kanaldaki lezyonun niteliğini belirleyemeyebilir; MR apsenin yerini ve yayılımını BT'den daha iyi gösterir. Geciken tanı kalıcı motor, duyu veya sfinkter işlev kaybına ilerleyebilir.
Faz ve pencere
- Kontrastsız
- BT spinal kanalda yer kaplayan bir lezyonu gösterebilir, ancak lezyonun niteliğini belirleyemeyebilir.
- Kontrastlı
- BT spinal kanalda yer kaplayan bir lezyon gösterebilir, ancak lezyonun niteliğini belirleyemeyebilir; MR apsenin yerini ve uzanımını BT’den daha iyi gösterir.
- Kemik algoritması
- BT'de eşlik eden vertebra destrüksiyonu görülebilir; ancak BT spinal kanal içindeki lezyonun niteliğini belirleyemeyebilir.
Önerilen pencereler G genişlik, M merkez; değerler Hounsfield birimi (HU)
- Yumuşak dokuG 400 / M +40
- KemikG 1800 / M +400
BT bulguları
- Kanal içi epidural yumuşak doku — epidural apse spinal kanalda yer kaplayan lezyon oluşturup dural tüpe bası yapabilir.
- Çevresel kontrastlanan odak — kontrastlı seride düşük atenüasyonlu merkez ve çevresel boyanma büyük apseyi destekleyebilir.
- Thekal kese basısı — spinal epidural apse dural kese üzerinde bası oluşturabilir.
- Paravertebral kaynak — psoas/paraspinal koleksiyonun veya enfekte disk-son plak seviyesinin kanala komşuluğu.
- Eşlik eden vertebral veya disk enfeksiyonu — epidural apseye komşu vertebra, disk ve paraspinal kaslarda inflamatuvar bulgular görülebilir.
- Posterior epidural odak — septik faset artritinde enfeksiyon faset ekleminden posterior epidural alana uzanabilir.
- Kraniokaudal yayılım — epidural apse birden fazla seviyeye uzanabilir; MR yayılımın yerini ve kapsamını BT'den daha iyi gösterir.
- MR’da epidural apse T2 ağırlıklı görüntülerde yüksek sinyalli içerik ve kontrast sonrası çevresel boyanma gösterebilir; difüzyon ağırlıklı görüntülerde içerik yüksek sinyalli olabilir.
Normalde
Spinal epidural alan yağ, arterler ve venöz pleksus içerir; spinal epidural apseyi değerlendirmede MR tercih edilen görüntüleme yöntemidir. BT spinal kanaldaki yer kaplayan lezyonun niteliğini belirleyemeyebilir; MR epidural apseyi değerlendirmede tercih edilen görüntüleme yöntemidir.
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 s1338; organ sınırları veri setinin otomatik segmentasyonundan, birleştirilerek sadeleştirildi. Görüntüler 2,5 mm kesit aralığına yeniden örneklendi.
Ayırıcı tanı
- Epidural flegmon
- kontrastlı MR'da homojen/inflamatuvar boyanma yapar; apse evresinde sıvı merkezi ve çevresel duvar henüz oluşmamış olabilir.
- Epidural hematom, spinal epidural apse için ayırıcı tanıda düşünülmelidir.
- Epidural metastaz, spinal epidural apse için ayırıcı tanıda düşünülmelidir.
- Disk hastalığı
- ekstrüde veya yer değiştirmiş disk, spinal epidural apse için ayırıcı tanıda düşünülmelidir.
- Epidural venöz pleksus, spinal epidural alanın normal anatomik içerikleri arasındadır.
Tuzaklar
- BT spinal kanaldaki yer kaplayan lezyonun niteliğini belirleyemeyebilir; epidural apse şüphesinde MR tercih edilen incelemedir.
- Epidural venöz pleksus spinal epidural alanın normal içeriklerindendir.
- MR apse yerini ve kraniokaudal uzanımını BT'den daha iyi gösterir; BT yayılımın kapsamını ortaya koyamayabilir.
- Eşlik eden vertebral destrüksiyon veya spondilodiskit bulgusu yokluğu epidural enfeksiyonu dışlamaz; apse faset eklemi veya hematojen yolla doğrudan epidural alanda gelişebilir.
- MR’da periferik ya da halka biçimli boyanma pürülan sıvı veya gerçek apseyi düşündürebilir; ayırıcı tanıda ekstrüde ya da yer değiştirmiş disk hastalığı da bulunur.
Kendini dene
Şiddetli sırt ağrısı ve ilerleyen nörolojik defisiti olan hastada BT tanısal değilse epidural apse şüphesinde hangi görüntüleme tercih edilmelidir?
Cevabı göster
Kontrastlı spinal MR. MR, spinal epidural apse şüphesinde tercih edilen görüntüleme yöntemidir; BT spinal kanaldaki yer kaplayan lezyonun niteliğini belirleyemeyebilir.
Kontrastlı MR'da spinal epidural lezyonda çevresel boyanma ve dural kese basısı görülüyor. Bu bulgular en çok hangi tanıyı destekler?
Cevabı göster
Spinal epidural apse. Epidural lezyonda çevresel veya halka biçimli boyanma pürülan sıvı ya da gerçek apse varlığını destekleyebilir; bu bulgu tek başına kesin tanı koydurmaz.
İlgili konular
Kaynaklar
Bu sayfadaki 38 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.