Zusammenfassung
Plattenepithelkarzinome und Adenokarzinome sind für die überwiegende Mehrheit der Ösophaguskarzinome verantwortlich. Die Prognose des Ösophaguskarzinoms ist weiterhin schlecht, da Frühsymptome fehlen und die Diagnose somit meist erst in fortgeschrittenen Stadien gestellt wird. Die bildgebende Diagnostik des Ösophaguskarzinoms hat im Wesentlichen 3 Aufgaben zu erfüllen: die exakte Bestimmung der lokalen Tumorausdehnung (T- und N-Stadium), den Ausschluss von Fernmetastasen (M-Stadium) sowie die frühe Beurteilung des Ansprechens auf eine neoadjuvante (Radio-)Chemotherapie (Responseevaluation). Die CT ist dem endoskopischen Ultraschall beim T- und N-Staging weiterhin unterlegen, spielt jedoch bei der Beurteilung einer Umgebungsinfiltration durch den Tumor (T4-Stadium) sowie beim Ausschluss von Fernmetastasen eine zentrale Rolle. Mithilfe der Multislice-CT (MSCT) erstellte Rekonstruktionen stellen oft die Beziehung des Tumors zu anatomischen Leitstrukturen, wie dem Tracheobronchialbaum oder dem Zwerchfell, anschaulicher dar als die axialen Quellbilder. Erste Versuche einer Therapiebeurteilung mittels CT-Volumetrie sind zwar vielversprechend, doch stellt die PET bzw. PET/CT mit dem Glukoseanalogon FDG derzeit die Methode der Wahl in der Responseevaluation dar.
Abstract
Squamous cell carcinomas and adenocarcinomas account for the majority of cases of esophageal cancer. Esophageal cancer often is diagnosed in advanced stages as clinical symptoms are lacking in early stages. The major aims of imaging in esophageal cancer are to determine local tumor extension (T and N staging), to rule out systemic disease (M staging), and to assess response to neoadjuvant therapy (response evaluation). CT is still inferior to endoscopic ultrasound in differentiating T stages and detecting regional lymph node metastases. However, it plays a central role in determining infiltration into adjacent organs (T4 stage) and in ruling out distant metastases. Multislice-CT (MSCT) offers the possibility of reconstructions, which often help to assess the relationship between tumor and anatomic landmarks like the tracheobronchial tree or the diaphragm. First results of CT volumetry for response evaluation are promising; however, PET and PET/CT with the glucose analogue FDG are the standard methods to evaluate response to neoadjuvant therapy.
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Holzapfel, K., Rummeny, E., Hannig, C. et al. Staging und Therapiebeurteilung des Ösophaguskarzinoms mittels MSCT. Radiologe 47, 101–109 (2007). https://doi.org/10.1007/s00117-006-1455-7
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DOI: https://doi.org/10.1007/s00117-006-1455-7
Schlüsselwörter
- Ösophaguskarzinom
- Multislice-CT (MSCT)
- Staging
- Therapiebeurteilung
- FDG-PET
Keywords
- Esophageal cancer
- Multislice-CT (MSCT)
- Staging
- Response evaluation
- FDG-PET