Özet
Pankreas sarkoidozu, sistemik sarkoidozun nadir bir visseral tutulumudur; hastalar karın ağrısı, sarılık veya tesadüfen saptanan pankreatik kitleyle değerlendirilebilir. Kontrastlı BT pankreasta sınırları belirsiz fokal hipoenhans alanı ve abdominal lenf nodlarını gösterebilir; toraks BT’de hiler ve mediastinal lenfadenopati saptanabilir. Görüntüleme paterni özgül değildir ve pankreas kanserini güvenle dışlayamaz; kesin ayrım çoğu durumda doku örneklemesi gerektirir. Pankreas sarkoidozunun kanser sanılması, benign bir hastalıkta gereksiz büyük cerrahiye yol açabilir; pankreas kitlesinde malignite olasılığı ayrıca değerlendirilmelidir.
Faz ve pencere
- Portal tanısal
- Kontrastlı BT’de pankreas başı veya unsinat proseste çevre parankimden daha az kontrastlanan, sınırları belirsiz fokal alan görülebilir. Bölgesel çölyak ve peripankreatik nodlar kontrastlanmış yumuşak doku olarak seçilebilir; bu bulgular sarkoidoza özgü değildir.
Önerilen pencereler: Batın (G 400 / M 50), Mediasten (G 350 / M 50), Yumuşak doku (G 400 / M 40).
BT bulguları
- Pankreas başında veya unsinat proseste çevre parankimden daha az kontrastlanan, sınırları belirsiz fokal yumuşak doku odağı.
- Nadir olgularda pankreasta birden fazla hipovasküler kitle görülebilir.
- Çölyak aks ve peripankreatik lenf nodlarında büyüme; nodlar tek başına sarkoidozu kanıtlamaz.
- Distal koledokta daralma ve proksimal safra yolu genişlemesi; pankreas başı odağının safra yolu ile temasını izle.
- Pankreatik kitle çevresinde çölyak arter, üst mezenterik damarlar ve portal venle yakın komşuluk veya sarılma; bu görünüm malignite ile örtüşebilir.
- Görüntü alanındaki toraksta bilateral hiler ve mediastinal lenfadenopati; eşlik eden perilenfatik akciğer nodülleri sistemik örüntüyü destekler.
- Karaciğer veya dalakta büyüme ve çoklu hipoattenüe nodüller gibi ek abdominal sarkoidoz bulguları.
Normalde
Kontrastlı BT’de pankreatik sarkoidoz lezyonları pankreas parankimine göre daha düşük atenüasyon gösterebilir. Pankreatik odağın çölyak aks, üst mezenterik damarlar ve portal venle ilişkisini değerlendir; toraks BT’de mediastinal lenfadenopati eşlik edebilir.
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
- Pankreatik duktal adenokarsinom
- fokal hipoenhans kitle oluşturabilir; vasküler invazyon ve kanal darlıkları ile seyrederek reseyabiliteyi belirler.
- Pankreatik tüberküloz
- nekrotik retroperitoneal veya peripankreatik lenfadenopati ve nekrotizan granulomalar daha ayırt edicidir; maligniteyi taklit edebilir.
- Otoimmün pankreatit
- bez büyümesi, kapsül benzeri çevresel rim ve uzun segmentli kanal darlıkları birlikte görülebilir; tek fokal baş kitlesiyle sınırlı kalmayabilir.
- Pankreatik lenfoma
- nadir görülür; lenf nodu büyümesi ve organ infiltrasyonu/yığılması ile karakterizedir.
- Pankreatik metastaz
- bilinen primer tümör öyküsü ve başka organ metastazlarının eşlik etmesi önemlidir; tek bir BT görünümü sarkoidozdan ayıramaz.
Tuzaklar
- Sarkoidoz öyküsü olan hastada pankreas kitlesini otomatik olarak granülomatöz tutulum sayma; yeni veya büyüyen odakta adenokarsinom görüntüleme ile dışlanamaz.
- Çölyak ve peripankreatik lenfadenopati sarkoidoza özgü değildir; nodların dağılımını toraks ve diğer abdominal organlardaki tutulumla birlikte yorumla.
- Vasküler sarılma ve invazyon her iki süreçte de görülebilir; çok fazlı ince dilimli BT ile damar tutulumu ve reseyabilite derecesi dikkatle değerlendirilmelidir.
- Toraks görüntü alanındaki nodlar yalnızca tek kesitte kalabilir; bilateral hiler ve mediastinal istasyonları çok düzlemli ve ardışık kesitlerde doğrula.
- Bilateral hiler ve mediastinal lenfadenopati sarkoidozu destekleyebilir, ancak tek başına pankreatik kitlenin tanısını koydurmaz; lenfoma, karsinom ve tüberküloz gibi benzer klinik tablolar oluşturan hastalıklar da dışlanmalıdır.
Kendini dene
Sistemik sarkoidozlu hastada BT, unsinat proseste hipoenhans odak ve çölyak nodlar gösteriyor. BT bulguları sarkoidoz olasılığını artırır ancak kesin tanı için doku örnekleme gereklidir.
Cevabı göster
Sarkoidozu düşündürür, özgül tanı koydurmaz. Fokal hipoenhans pankreas odağı ve nodlar sistemik sarkoidoz bağlamında olasılığı destekler, ancak aynı görünüm adenokarsinom ve diğer süreçlerde bulunabilir. BT doku tanısı vermez; maligniteyi dışlamak veya granülomları doğrulamak için klinik ekip ek değerlendirme ve gerektiğinde biyopsi planlar.
Pankreatik kitleye bilateral hiler ve mediastinal lenfadenopati eşlik ettiğinde hangi tanı desteklenir?
Cevabı göster
Sarkoidoz. Bilateral hiler ve mediastinal lenfadenopati sarkoidozu destekler; ancak görüntüleme pankreas sarkoidozuna özgü değildir ve tek başına kesin tanı koydurmaz.
Kaynaklar
Bu sayfadaki 36 cümle ve 2 quiz sorusu aşağıdaki kaynaklardan alıntılarla otomatik olarak karşılaştırıldı; 15 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.