The Diagnostic Sensitivity and Specificity of the Endosonography(EUS) and EUS-Guided Fine Needle Aspiration Biopsy of Upper Gastrointestinal Subepithelial Lesions

G A A b st ra ct s of uniform uptake within the DC compared with the irregular uptake in the AC. 3. No subject was identified as having zero uptake in any segment by all observers. 4. The quantitative analysis of uptake also showed differences in the percentage uptake for the various segments, highest in C+AC. Discussion 1. The pattern of uptake, irregular in C+AC and more uniform elsewhere, probably explains the differences between quantitative and qualitative results. 2. These findings confirm our anecdotal observation but do not explain the underlying mechanisms. 3. Possible reasons for our findings include water reabsorption, colonic muscle uptake and uptake by microbes when fermenting undigested fibre. Conclusion FDG uptake in the colon occurs frequently and offers the potential for a non-invasive probe of colonic physiology. Quantitative uptake (mean ± SD) in 9 patients (1 excluded because of anomalously high uptake in DC)