Silikon ilişkili lenfadenopati

Özet

Silikon bölgesel lenf nodlarına taşınabilir ve nodlarda granülomatöz yabancı cisim reaksiyonu oluşturabilir. Toraks BT, aksiller, internal mammaryal ve mediastinal nodal istasyonları aynı inceleme alanında gösterebilir; rutin BT, silikon ilişkili nodal hastalığı metastazdan tek başına güvenilir biçimde ayıramaz. Çift enerjili BT'nin silikon materyal haritası nod içindeki silikon birikimini destekleyen ek bilgi sağlayabilir. Silikon ilişkili lenfadenopati meme kanseri öyküsü olan hastalarda metastazı taklit edebilir; bir nodda silikon saptanması diğer nodlardaki maligniteyi dışlamaz.

Faz ve pencere

Kontrastsız tanısal

Aksiller, internal mammary veya mediastinal zincirde büyümüş yumuşak doku yoğunluklu nod görülebilir; silikonun atenüasyonu rutin tek enerjili BT’de yumuşak dokuya benzediğinden nod içi silikon güvenilir biçimde ayrılamaz. Çift enerjili kontrastsız çekim mevcutsa silikon materyal haritasında nod içi sinyal araştırılır; sinyal nodda silikon birikimini destekler ancak diğer nodlardaki metastaz olasılığını dışlamaz.

Önerilen pencereler: Yumuşak doku (G 400 / M 40), Mediasten (G 350 / M 50).

BT bulguları

• İmplant tarafı aksiller nod büyümesi — silikon en sık bölgesel aksiller drenaj nodlarında saptanır.
• Internal mammary nod tutulumu — parasternal zincirde büyümüş nodlar implantlı hastada silikon birikimiyle ilişkili olabilir.
• Mediastinal veya supraklaviküler tutulum — silikon ilişkili nodlar aksiller ve internal mammary zincirlerin yanı sıra daha proksimal nodal istasyonlarda da görülebilir.
• Çift enerjili silikon haritası — nodla eşleşen materyal sinyali, tek enerjili görüntüde belirsiz kalan nod içeriğini karakterize etmeye yardım eder.
• İmplant dışı silikon — kapsül dışına uzanan materyal ve implant konturundaki bozulma makroskopik kaçak olasılığını artırır.
• Nod içi silikon ile tümör birlikteliği — silikon saptanması aynı hastadaki diğer şüpheli nodların malignite durumunu tek başına belirlemez.
• Drenaj zinciriyle uyum — implant tarafı, aksiller ve internal mammary nod dağılımı ile implant çevresindeki silikon bulguları birlikte örüntü oluşturabilir.

Normalde

Internal mammary nodlar parasternal zincirde sıklıkla izlenir ve çoğunlukla benign seyrettiği için görüntüleme takibi önerilebilir; normal aksiller nod morfolojisi bu kaynaklarda detaylandırılmamıştır. Sağ ve sol nodların biçimini ve implant tarafına göre dağılımını kıyaslayın; silikon materyal haritasında nod içine yerleşen silikon sinyali normal nod bulgusu değildir.

Ayırıcı tanı

Meme karsinomu metastazı

bilinen kanser öyküsü, yeni veya büyüyen nod ve şüpheli morfoloji metastaz olasılığını korur; silikon saptanması diğer nodları açıklamaz.

Reaktif nod

silikon birikimine bağlı yabancı cisim reaksiyonu veya granülomatöz inflamasyon nod büyümesi oluşturabilir ve malignite ile karışabilir.

Lenfoma

Hodgkin lenfoma üst gövde lenf nodlarını, aksiller nodlar dahil, tutabilir ve silikon ilişkili lenfadenopatiyi taklit edebilir.

Granülomatöz hastalık

bilateral hiler veya mediastinal nodlar ile akciğer parankim bulguları sarkoidoz gibi granülomatöz hastalıklar için bağlam sağlar; enfeksiyonla örtüşme olabilir.

İmplant çevresi silikonoma

periprostetik veya aksiller yumuşak dokudaki silikon granülomu nodal yumuşak doku kitlesine benzeyebilir; odağın nodal zincir ve implant kapsülüyle ilişkisini çok düzlemli görüntüde izleyin.

Tuzaklar

• Rutin BT, silikon ilişkili nodal hastalığı metastazdan tek başına ayıramaz; nodal bulguyu karakterizasyon yapılmadan özgül kabul etmeyin.
• Silikon materyal haritası nodda silikon varlığını desteklese de diğer şüpheli nodlardaki kanser metastazı olasılığını dışlamaz.
• İmplantta yırtık saptanmaması silikon ilişkili nodal birikimi dışlamaz; silikon lenfadenopatisi sağlam implantlarda da bildirilmiştir.
• Silikon ilişkili yabancı cisim reaksiyonu FDG tutulumu yapabildiğinden PET aktivitesi tek başına metastaz kanıtı değildir.

Kendini dene

1. Silikon implantlı ve meme kanseri öykülü hastanın aksiller nodunda çift enerjili materyal haritası silikonla uyumlu sinyal gösteriyor. Bu sinyalin en doğrudan açıkladığı bulgu hangisidir?

   • Nodda implant kaynaklı silikon birikimi
   • Meme karsinomu metastazı
   • Hodgkin lenfoma
   • Granülomatöz enfeksiyon
   Cevabı göster

   Nodda implant kaynaklı silikon birikimi. Silikonla uyumlu DECT materyal sinyali nod içindeki silikon birikimini destekler. Bu bulgu diğer şüpheli nodlardaki metastazı tek başına dışlamaz.

2. İmplantlı hastada aksiller nod büyümüşse, rutin BT bulguları silikon ilişkili nodal reaksiyonu metastazdan tek başına ayırt ettirmez. Hangi sonuç çıkarılabilir?

   • Nod içeriği BT ile ayırt edilemez
   • Metastaz kesin dışlanmıştır
   • Silikon kesin kanıtlanmıştır
   • İmplant yırtığı kanıtlanmıştır
   Cevabı göster

   Nod içeriği BT ile ayırt edilemez. Tek enerjili BT'de silikon ve nodal yumuşak doku benzer görünür; yalnız büyümeye bakarak içerik belirlenemez. Bu görüntü metastazı dışlamaz, silikon veya implant yırtığını da kanıtlamaz.

Kaynaklar

Bu sayfadaki 38 cümle ve 2 quiz sorusu aşağıdaki kaynaklardan alıntılarla otomatik olarak karşılaştırıldı; 10 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.