Comparison of special interest computed tomography, endosonography and histopathological stage of oesophageal cancer.

Research paper by S R SR Weaver, G R J C GR Blackshaw, W G WG Lewis, P P Edwards, S A SA Roberts, G V GV Thomas, M C MC Allison

Indexed on: 18 May '04Published on: 18 May '04Published in: Clinical Radiology


To assess the strength of agreement between the perceived pre-operative stage of oesophageal tumours as determined by spiral computed tomography (CT) and endoscopic ultrasound (EUS), both alone and in combination, with the histopathological stage.Sixty patients with oesophageal cancer underwent both pre-operative CT and EUS performed by two consultant radiologists with a special interest in upper gastrointestinal radiology. The strength of the agreement between the radiological stage and the histopathological stage was determined by means of the weighted Kappa statistic (Kw).Sensitivity for T and N stages was 58% and 79% for CT, and 72% and 91% for EUS. Specificity for T and N stages was 80% and 84% for CT, and 85% and 68% for EUS. Kw for T and N stages was 0.455 (p=0.0001) and 0.603 (p=0.0001) for CT compared with 0.604 (p=0.0001) and 0.610 (p=0.0001) for EUS. In patients when CT and EUS agreed regarding the T and N stages, the strength of agreement between the radiological and the histopathological stage was greater (Kw T 0.613 (p=0.0001), Kw N 0.781 (p=0.0001)).CT and EUS are complimentary techniques for the staging of oesophageal tumours, and these results reinforce the importance of specialist radiology in stage directed management.