Osteoporotik vertebral deformite

Özet

Osteoporotik vertebral deformite yaşlı erişkinde düşük enerjili travma, yeni sırt-bel ağrısı veya başka nedenle çekilen BT sırasında saptanabilir. BT kemik yapıyı iyi gösterir; kortikal yıkım ve posterior eleman tutulumunun değerlendirilmesine, benign-malign ayrımına ve akut-kronik değerlendirmeye katkı sağlar. Önceki görüntülerle karşılaştırma kırığın yaşını değerlendirmeye yardımcı olur; akutluk belirsizse MR’da kemik iliği ödeminin bulunmaması eski kırık lehinedir. Kitle benzeri yumuşak doku bileşeni patolojik kırık kuşkusunu artırabilir; spinal kanala uzanan yumuşak doku basısı nörolojik yapılara bası oluşturabilir.

Faz ve pencere

Kontrastsız tanısal

Sagittal yeniden yapılandırılmış BT görüntüleri vertebra kırıklarının tesadüfen saptanmasına yardımcı olur; BT kemik yapıyı iyi göstererek kortikal yıkım ve posterior eleman tutulumunu ortaya koyabilir.

BT bulguları

• Ön, orta veya arka korpus yüksekliğinin azalması kama, bikonkav ya da yaygın ezilme biçiminde deformasyon oluşturur.
• Üst veya alt son plakta çökme, kortikal basamaklanma ve trabeküler impaksiyon kırığı destekler.
• Kırık hattı keskin sınırlı olabilir; benign kırıkta kemik iliği içi hava yarığı (vakum çentek belirtisi) güvenilir bir bulgu olarak görülebilir.
• Arka korteksin içe yer değiştirmiş parçası spinal kanala retropulse olabilir; sagittal görünümde kanal çapı ve tekal kese düzeyi birlikte incelenir.
• İntravertebral hava veya vakum yarığı benign vertebra kırığı için güvenilir bir gösterge olabilir.
• Birden fazla seviyedeki benzer çökme kırılganlık lehinedir; yine de eşlik eden odaksal litik lezyon ayrıca aranır.
• Korpusun genişlemesi, posterior eleman tutulumu, destrüktif kemik odağı veya kitle benzeri epidural/paravertebral doku patolojik kırık açısından kuşku uyandırır.
• Genant semikantitatif yöntemi D4–L4 vertebraların görsel olarak yükseklik azalması ve morfolojik değişiklik açısından değerlendirilmesine dayanır; orta torasik ve torakolomber bölgede normal ön kama görünümü erken osteoporotik çökmeden ayırt edilmeli, komşu vertebralara göre şekil değişiklikleri nitel yorumda belirtilmelidir.

Ölçütler ve sınıflamalar

Genant hafif deformite

%20-25 vertebra yüksekliği kaybı

Genant orta deformite

%26-40 vertebra yüksekliği kaybı

Genant ağır deformite

>%40 vertebra yüksekliği kaybı

Genant semikantitatif vertebral deformite derecesi

Derece 0 normaldir; derece 1 hafif yükseklik kaybı (%20-25), derece 2 orta kayıp (%26-40), derece 3 ağır kayıp (>%40) olarak tanımlanır. Sistem radyografik görsel derecelendirme için geliştirilmiştir; BT’de ölçülen deformiteye aktarılırken morfoloji ve kırık bulguları da göz önünde tutulmalıdır.

Normalde

Normal ve uygun pozisyonlu görüntülemede son plaklar yatay, komşu vertebraların şekil ve boyutu benzerdir. BT’de vertebraları yalnız aksiyel kesitlerde incelemek kırıkların gözden kaçmasına yol açabileceğinden sagittal yeniden yapılandırmaları da değerlendir; kırığın yaşını belirlemek için önceki görüntülerle karşılaştır.

Ayırıcı tanı

Metastatik veya malign çökme lehine posterior korteksin dışbükey bombeleşmesi, posterior eleman tutulumu ya da yumuşak doku bileşeni bulunabilir; bu özellikler benign kırıkla ayrımda yardımcıdır.

Akut travmatik kırık

yüksek enerjili öykü ve posterior eleman/kemik arkı kırıkları eşlik edebilir; yalnız korpus kama deformitesi osteoporozu kanıtlamaz.

Schmorl nodülü

disk materyali son plakta sınırlı bir çökme yapar; tüm korpus yüksekliğinin azalması beklenmez.

Gelişimsel kama vertebranın değerlendirilmesinde normal ön kama görünümünü erken osteoporotik çökmeden ayırmak güç olabilir; seri görüntülerle karşılaştırma yardımcı olur.

Enfeksiyöz spondilodiskit

komşu iki son plakta düzensiz yıkım ve disk aralığında daralma/erozyon ön plandadır; izole ön kama çökmesi tipik değildir.

Tuzaklar

• Tek bir yüksekliği komşu seviyeye oranlayıp Genant derecesini kesin kırık tanısı gibi sunma; dejenerasyon, eski gelişimsel şekil ve komşu vertebra kırıkları karşılaştırmayı bozabilir.
• Kırığın yaşı belirsizse önceki görüntülerle karşılaştırma ve MR’da kemik iliği ödeminin değerlendirilmesi yardımcı olabilir.
• Malign kırık lehine posterior korteksin dışbükey bombeleşmesi, posterior eleman tutulumu veya yumuşak doku bileşeni aranmalıdır.
• Akut travma görüntüsünde paravertebral kanama ve ödemi otomatik olarak tümör kitlesi sayma; kitle benzeri solid doku yerine düzgün sınırlı yumuşak doku kalınlaşması olup olmadığını incele.

Kendini dene

1. BT’de saptanan vertebra kırığının yaşı belirsiz olduğunda, kaynakta problem çözücü yöntem olarak belirtilen görüntüleme hangisidir?

   • MR
   • Düz grafi
   • DEXA
   • Ultrasonografi
   Cevabı göster

   MR. Kaynak, MR ve nükleer tıbbın vertebra kırıklarının yaşını ve etiyolojisini belirlemede problem çözücü yöntemler olarak kullanıldığını belirtir; seçenekler içinde MR bu amaçla uygun yanıttır.

2. Önceki BT’de olmayan çökme ile birlikte korpus genişlemesi ve paravertebral solid doku var. En olası neden grubu hangisidir?

   • Osteoporotik impaksiyon
   • Neoplastik patolojik kırık
   • Gelişimsel kama
   • Schmorl nodülü
   Cevabı göster

   Neoplastik patolojik kırık. Ekspansiyon ve solid paravertebral yumuşak doku, basit osteoporotik impaksiyon yerine tümör infiltrasyonlu patolojik kırığı düşündürür. Gelişimsel kama eski ve düzgün konturludur; Schmorl nodülü fokal son plak herniasyonudur.

Kaynaklar

Bu sayfadaki 41 cümle ve 2 quiz sorusu aşağıdaki kaynaklardan alıntılarla otomatik olarak karşılaştırıldı; 14 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.