İnmemiş/ektopik testis: tesadüfi BT bulgusu

Özet

İnmemiş testis, skrotumda beklenen gonadın bulunmadığı ve testisin iniş yolu üzerinde ya da ektopik bir konumda kaldığı durumdur. BT, inmemiş testisi saptamada güvenilir değildir ve radyasyon içerir; testis benzeri bir bulgu BT ile kesin olarak tanımlanamayabilir. İntraabdominal testis atrofik, torsiyone ya da tümörlü olabilir ve testis tümörü riski artmıştır. Bulguyu atlamak, inmemiş testisin yerinin ve olası komplikasyonlarının fark edilmemesine yol açabilir; klinik değerlendirme tanıda önemlidir.

Faz ve pencere

Kontrastsız

İnmemiş testis inguinal kanalda, pubik tüberkül yakınında veya daha seyrek karında yerleşebilir; BT'de hipodens görünebilir. Küçük veya atrofik testisi lenf nodundan ayırmak mümkün olmayabilir.

BT bulguları

• Skrotal kesenin boş görünmesi; yalnız taranan alan içindeki taraf için yorumlanabilir
• İnguinal kanal boyunca veya iç halka yakınında oval, düzgün sınırlı yumuşak doku odağı
• Pelvis ya da alt karında, normal iniş yolu dışında yerleşmiş testis benzeri doku
• Karşı taraf testise göre küçük hacim veya belirgin incelme; atrofiyi düşündürür ancak BT tek başına işlev göstermez
• Testis dokusunda kaba heterojenite ya da solid büyüme; eşlik eden tümör açısından şüphelidir
• İnguinal kanalda yağ veya barsak içeren kese ve aynı kesede testis; eşlik eden inguinal herniyi düşündürür

Ölçütler ve sınıflamalar

Yerleşime göre inmemiş testis

İniş yolu üzerindeki testis abdominal, inguinal veya yüksek skrotal konumda; ektopik testis normal iniş yolundan saparak perineal, femoral ya da yüzeyel inguinal bölgede bulunabilir.

Normalde

Normalde testisler skrotal kesede bulunur; spermatik kord inguinal kanalda izlenebilir. Boş hemiskrotumda BT ile testisin yerini belirlemek güvenilir değildir.

Ayırıcı tanı

İnguinal lenf nodu

oval olabilir; gonadal damar boyunca devamlılık ve karşı skrotal testisin yokluğu testis lehinedir

İnguinal herni

yağ veya barsak ansı içeriği ve derin halkaya uzanan kese izlenir

İnguinal kanal lipomu

yağ dansitesindedir; testise benzer yumuşak doku yoğunluğu göstermez

Skrotal boşlukta geçirilmiş orşiektomi

cerrahi öykü ve klips/skar eşlik edebilir; BT tek başına nedeni belirleyemez

Pelvik yumuşak doku kitlesi

testis de pelviste yerleşebileceğinden, yalnız pelvik konum ayırıcı tanı için yeterli değildir.

Tuzaklar

• Küçük intraabdominal testis, retroperitoneal lenf nodu veya küçük kistik yapı sanılabilir; gonadal damarların seyrini ve karşı testisi birlikte izle.
• Skrotumun tarama alanı dışında kalması, testisin yok olduğu anlamına gelmez; yalnız kapsanan kesitler için taraflı bulgu bildir.
• Kontrastsız BT’de doku karakterizasyonu kısıtlıdır; şüpheli solid odak için BT ile testis tümörü tanısı koyma.
• Çocuklarda inmemiş testisin yerini belirlemek için BT rutin tercih edilmemelidir; testisi tanımlamada güvenilir değildir ve radyasyon içerir.

Kendini dene

1. BT’de inguinal kanalda hipodens, testis benzeri bir odak görülürse hangi yorum kaynakla uyumludur?

   • İnmemiş testis olabilir; lenf nodu veya küçük kistik yapılardan ayırmak güç olabilir
   • Hipodens görünüm testis tanısını kesinleştirir
   • Bu görünüm yalnızca lenf nodunu gösterir
   • BT, bu bulguda testisi lenf nodundan her zaman ayırır
   Cevabı göster

   İnmemiş testis olabilir; lenf nodu veya küçük kistik yapılardan ayırmak güç olabilir. İnmemiş testis BT’de hipodens görünebilir; lenf nodu veya küçük kistik yapılardan ayırmak güç olabilir.

2. BT, inmemiş testisin yerini belirlemede neden rutin tercih edilmez?

   • Testisi tanımlamada güvenilir olmayabilir ve radyasyon içerir
   • Testis BT'de her zaman yağ dansitesindedir
   • BT inguinal herniyi gösteremez
   • BT ile kontrastsız görüntü alınamaz
   Cevabı göster

   Testisi tanımlamada güvenilir olmayabilir ve radyasyon içerir. BT testisi tanımlamada güvenilir olmayabilir ve çocuklarda önemli radyasyon kaygısı taşır.

İlgili konular

• Testis tümörü: primer kitle ve BT sınırı
• Testis germ hücreli tümörü: BT evrelemesi

Kaynaklar

Bu sayfadaki 34 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.