Thank you for your interest dreabeck. The following information is from the American Cancer Society
and contains the most recent evidence based guidelines....
Testing for people at high risk
Many experts recommend that people with a high risk of esophageal cancer, such as those with Barrett's esophagus, have upper endoscopy regularly. For this test, the doctor looks at the inside of the esophagus through a flexible lighted tube called an endoscope. The doctor may remove small samples of tissue (biopsies) from the area of Barrett’s so that they can be checked to see if they contain any abnormal cells (including cancer cells). They will also get tissue samples from any areas that look more abnormal.
Doctors are not certain how often the test should be repeated, but most recommend testing more often if areas of abnormal cells (called dysplasia) are found. This testing is repeated even more often if there is high-grade dysplasia (the cells appear very abnormal).
Careful monitoring and treatment (if needed) may help prevent some esophageal cancers from developing. It may also detect some cancers early, when they are more likely to be treated successfully.