Over tümörlerinde BT’de ayırt edilen alt tip örüntüleri

Özet

Over neoplazilerinin görüntüleme bulguları alt tipler arasında örtüşebilir; bu durum doğru ayırıcı tanıda zorluk yaratabilir ve kesin sınıflama için histopatoloji gereklidir. Seröz tümörlerde papiller veya solid kontrastlanan bileşenler ve peritoneal yayılım görülebilirken, müsinöz neoplaziler sıklıkla büyük multiloküle kistik kitle oluşturur. Bilateral solid-kistik kitleler ve eşlik eden gastrointestinal odak, over metastazı olasılığını gündeme getirir. Örüntüleri birbirine karıştırmak primer tümör ile metastaz ayrımını ve doğru evreleme incelemesini geciktirebilir; kesin sınıflama histopatoloji gerektirir.

Faz ve pencere

Portal tanısal

Kontrastlı portal venöz seride kist duvarı ve septaların düzensiz kalınlaşması, kontrastlanan papiller/solid bileşenler, nekroz, bilateral kitleler ve peritoneal yayılım aranır; BT, MRG dinamik kontrast karakterizasyonunun yerini tutmaz.

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

BT bulguları

• Seröz örüntü: papiller çıkıntılı veya solid-kistik adneksiyel kitle; eşlik eden asit ve peritoneal implantlar olabilir
• Müsinöz örüntü: çoğunlukla tek taraflı, büyük ve multiloküle kistik kitle; loküller farklı içerik yoğunlukları gösterebilir
• Kalın, düzensiz septa veya duvar ve kontrastlanan mural nodül; sınırda ya da malign epitelyal neoplazi kuşkusunu artırır, fakat özgül değildir
• Belirgin solid bileşen, nekroz veya çevre organa uzanım; invaziv tümör morfolojisi lehine
• Bilateral, lobüle ve solid-kistik adneksiyel kitleler; özellikle eşlik eden mide, kolon veya apendiks tümörlerinde sekonder metastaz olasılığını düşündürür.
• Omental kek, yüzey implantları, asit ve mezenterik nodüller; yayılım paternini ve primer-metastatik ayrımını araştırmayı gerektirir
• Müsinöz kitle yanında lokalize müsinöz asit ve peritoneal yayılım; psödomiksoma peritonei ve apendiks kaynağı olasılığını düşündürür.

Ölçütler ve sınıflamalar

Morfolojik örüntü (histolojik tanı değildir)

Seröz: papiller/solid-kistik kitle ve peritoneal yayılım örüntüsü. Müsinöz: genellikle büyük, tek taraflı, multiloküle kistik kitle. Sekonder/metastatik: sıklıkla bilateral, lobüle solid-kistik kitle ve olası gastrointestinal primer. Bu görünümler örtüşür; alt tip patolojiyle belirlenir.

Normalde

Normal overler uterus yanında küçük, düzgün konturlu yapılar olarak izlenir; multiloküle kistik kitle, kalın septa veya kontrastlanan papiller doku bulunmaz. Karşı adnekle boyut ve taraflığı karşılaştırınız; ayrıca omentum, periton ve bağırsak kökenli olası primer odakları da değerlendirmelisiniz.

Ayırıcı tanı

Matür kistik teratom

makroskopik yağ, yağ-sıvı seviyesi ve diş benzeri kalsifikasyon malign epitelyal kitleden ayrılır.

Endometrioma ayırıcı tanıda yer alır; BT'de heterojen kontrastlanma gösterebilir.

Tubo-ovaryan apse, adneksiyel kitle ayırıcı tanısında yer alır; BT bu apseyi saptamada kullanılabilir.

Over metastazı

bilateral lobüle solid veya solid-kistik kitle, bilinen ekstraovaryan tümör ve serozal yüzey implantları primer epitelyal tümörden ayrımı destekler.

Peritoneal müsinöz hastalık

apendiks primeriyle ilişkili psödomiksoma, over müsinöz primerini taklit edebilir; apendiks ve peritoneal yüzeyler dikkatle taranmalıdır.

Tuzaklar

• Büyük multiloküle kitle müsinöz histolojiyi düşündürür ama kanıtlamaz; boyut ve lokülasyon görünümü histopatolojik alt tipe eşit değildir.
• Papiller çıkıntı maligniteye özgü değildir; kontrastlanan gerçek solid doku ile ince septa veya kist içi debris ayrımını yapın.
• Bilateral kitle metastaz olasılığını yükseltir ancak primer over tümörü de bilateral olabilir; bilinen primer ve eşlik eden peritoneal bulguları tarayın.
• Over müsinöz kitlesi ile psödomiksoma görülmesi primer over tümörünü kanıtlamaz; apendiks kaynaklı hastalık dışlanmalıdır.

Kendini dene

1. BT'de tek over kaynaklı, çok sayıda lokülü ve farklı içerik yoğunlukları olan dev kistik kitle görülüyor. Hangi morfolojik örüntü akla gelir?

   • Müsinöz neoplazi
   • Seröz papiller tümör
   • Over metastazı
   • Matür kistik teratom
   Cevabı göster

   Müsinöz neoplazi. Büyük multiloküle ve loküller arası içerik farklılığı gösteren kitle müsinöz neoplazi örüntüsüne uyar, ancak histolojiyi kanıtlamaz. Seröz tümörde papiller/solid bileşenler; metastazda bilateral lobüle yapı; teratomda yağ veya diş benzeri kalsifikasyon beklenir.

2. İki overde lobüle solid-kistik kitle, eşlik eden mide duvarı odağı ve peritoneal implantlar var. Hangi olasılık ayrıca araştırılmalıdır?

   • Gastrointestinal over metastazı
   • Tek taraflı müsinöz kistadenom
   • Endometrioma
   • Matür kistik teratom
   Cevabı göster

   Gastrointestinal over metastazı. Bilateral kitleler ve eşlik eden olası mide primeri sekonder over metastazını düşündürür; patoloji ve klinik öyküyle doğrulanır. Diğer tanılar çoğunlukla farklı iç yapı gösterir ve mide odağı ile peritoneal yayılımı bu örüntüde açıklamaz.

Kaynaklar

Bu sayfadaki 41 cümle ve 2 quiz sorusu aşağıdaki kaynaklardan alıntılarla tek tek karşılaştırıldı; 7 cümle bu karşılaştırmada düzeltildi (2026-10-08).

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