Hey, Boston --

Do a search for Barrett's (with the apostrophe) or Barretts (without) in the search box in the upper right corner of this page. There are a number of posts that discuss it.

In one, Brian Hill describes Barrett's as a response to acid reflux disease, where the stomach overproduces acids that come up and cause "burns" on the esophagus -- it's the cellular changes that are designed to protect the esophageal tissues from the excess acid but that also can turn to cancer, so it needs to be monitored. A regular poster here, EZJim, has it.