Upper GI 2017

N Staging - MDCT

•CT - high specificity, but low sensitivity •Based on size criteria (short axis): ≥6mm perigastric ≥ 8mm extra perigastric ≥10mm mediastinum

No of Regional Nodes

Accuracy of N staging Oesophageal Cancer

Stage

68%*

N1 N2 N3

≤2

3-6

67% †

Gastric Cancer

≥7

* Davies, A. R., D. A. Deans, et al. (2006). Dis Esophagus 19 (6): 496-503 †Hur, J., M. S. Park, et al. (2006). J Comput Assist Tomogr 30 (3): 372-7.