Whether this represents superficial change only, without influencing cancer development in the glands, or whether it also stops cancer dead in its tracks, remains to be seen with time. The observations, however, suggest antireflux surgery may indeed be effective in cancer prevention. Once the diagnosis is suspected, it can be confirmed by direct or indirect evidence. Reflux can be seen of the swallowed barium. Swallowing scan .
Food mixed with radioisotope is swallowed and scans taken to detect the location of isotope.
Indirect evidence Pressure studies . A probe is introduced into the gullet which measures the pressures at various levels. Abnormally low pressures at the lower end of the gullet suggests that it may not close properly, allowing reflux to take place. Motility studies . About the same as the above, but assessing the propulsive motility of the esophagus.