Humerus cisim kırığı BT bulguları

Özet

Humerus cisim kırığı, proksimal ve distal metafizler arasında kalan diyafiz korteksinin travma veya zayıflamış kemik zemini üzerinde sürekliliğini kaybetmesidir. Çoğu olguda iki düzlemli radyografi tanı için yeterlidir; BT, kırığın omuz ya da dirsek eklemine uzanımının belirsiz olduğu, parçalanmanın karmaşık olduğu veya eşlik eden kemik lezyonunun haritalanması gereken durumlarda kemik geometrisini netleştirir. Kırık yönü, deplasman, açılanma ve parçalı segmentler ile medüller/kortikal lezyon birlikte değerlendirilir. Kırığın eklem uzanımının veya patolojik zeminin atlanması yaralanma kapsamını eksik bırakır; radial sinir ve brakiyal damar komşuluğu ayrıca klinik muayene bağlamında ele alınır.

Okuma sırası

Humerus diyafiz korteksi. Kırık hattını inceleyin; özellikle oblik veya parçalı örüntülerde proksimale ya da distale uzanan ince hatları arayın.
Ana kırık fragmanları. Proksimal ve distal ana fragmanların yönünü izleyin; açılanma ve ötelemenin hangi düzlemde belirgin olduğunu karşılaştırın.
Ara fragmanlar ve medüller kanal. Kırık aralığındaki ara parçaları ve medüller teması inceleyerek basit çizgi ile parçalı örüntüyü ayırın.
Eklem yüzleri ve kırık çevresi kemik. Son olarak kırık hattının omuz/dirsek eklemine uzanımını ve çevresinde tümör düşündüren odak ya da yumuşak doku kitlesi bulunup bulunmadığını tamamlayın.

Faz ve pencere

Kontrastsız tanısal: Kortikal kesinti, kırık hattının oblik/transvers/spiral yönelimi, fragmanların öteleme ve açılanması, parçalanma ile proksimal-distal eklem yüzlerine uzanım izlenir.
Kemik algoritması tanısal: İnce kesit ve uzun eksene paralel koronal-sagittal reformasyonlar kırık uçlarının rotasyonunu, kortikal temasını, küçük kelebek fragmanını ve şüpheli lezyonun korteks/medulla ile ilişkisini gösterir.

Önerilen pencereler: Kemik (G 1800 / M 400).

BT bulguları

Kırık yönelimi — diyafiz boyunca transvers, oblik, spiral veya segmental çizgi; hattı birden çok planda takip edin.
Fragman deplasmanı — başlıca proksimal ve distal parçaların öteleme, açılanma ve rotasyon yönü tarif edilir.
Kelebek fragmanı ve parçalanma — kompresyon/torsiyon bileşenine eşlik eden ara kortikal parçalar ve fragman sayısı gösterilir.
Kırık uçlarının kemik morfolojisi ve kırık örüntüsü BT’de ayrıntılı değerlendirilebilir.
Eklem uzanımı — proksimalde humerus başı/tüberkül veya distalde kondil-troklea eklem yüzüne ulaşan hat aranır.
Patolojik zemin — kırık çevresinde kortikal yıkım gibi agresif özellikler varsa ileri patolojik değerlendirme gerekir.
Yumuşak doku bileşeni — kırık çevresinde kortikal destrüksiyon veya yumuşak doku uzanımı varsa olguyu yalnız travmatik kırık olarak değerlendirmeyin.
AO/OTA sınıflamasında humerus cisim kırıkları basit (A), kama (B) ve çok parçalı (C) örüntüler olarak sınıflanır.

Normalde

Humerus cismi, proksimal ve distal uç segmentler arasındaki diyafiz bölgesidir. Humerus cisim kırığının yeri, proksimal ve distal uç segmentler arasındaki şaft bölgesine göre tanımlanır.

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 s1278; organ sınırları veri setinin otomatik segmentasyonundan, birleştirilerek sadeleştirildi. Görüntüler 2,5 mm kesit aralığına yeniden örneklendi.

Ayırıcı tanı

Eski kaynamış kırıkta kallus oluşumu ve radyolojik birleşme görülebilir.
Tümör ilişkili patolojik kırık: kırık hattına eşlik eden kortikal yıkım gibi agresif özellikler ileri patolojik değerlendirmeyi gerektirir.

Tuzaklar

Omuz veya dirsek eklemi hacim dışında kalıyorsa kırığın ekleme uzanmadığını varsaymayın; mevcut incelemenin kapsadığı alanı ve gerekirse ek görüntü ihtiyacını belirtin.
Spiral kırık hattı tek aksiyel kesitte kısa bir çizgi gibi görünebilir; koronal ve sagittal reformasyonlarda hattı korteks çevresinde takip edin.
Kırık kenarındaki kortikal düzensizliği yalnız travmaya bağlamayın; kemik yıkımı ve medüller ya da yumuşak doku uzanımı gibi agresif lezyon özelliklerini de inceleyin.
Kontrastsız kemik BT'si damar lümenini veya sinir işlevini göstermez; humerus cisim kırıklarında radial sinir bulguları, yüksek enerjili travmada ise brakiyal arter bulguları ayrıca klinik bağlamda değerlendirilmelidir.

Kendini dene

Humerus diyafizinde litik lezyonla birlikte kırık görülmesi en çok hangi durumu düşündürür?
Cevabı göster
Patolojik kırık. Diyafizde genişleyici litik lezyonla birlikte kırık, patolojik kırık olasılığını düşündürür.
Humerus cisim kırığında BT, hangi durumda kemik morfolojisini ve kırık uzanımını değerlendirmede özellikle yararlıdır?
Cevabı göster
Eklem içi uzanım şüphesinde. BT, karmaşık kırıklarda ve eklem içi uzanım şüphesinde kemik morfolojisini ayrıntılı gösterir.

İlgili konular

Kaynaklar

Bu sayfadaki 31 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.