Note the areas of dark red friable mucosa representing Barrett esophagus.

暗红色碎片状黏膜提示Barrett食管。

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Doctors can sometimes see the cancer coming years earlier when acid reflux causes cells in the esophagus to mutate to become more like stomach tissue, a condition called Barrett's esophagus.

WSJ: Esophageal Therapy You Can Stomach

This comes from the work of Carlo Maley and his colleagues working on Barrett's Esophagus.

NPR: Startling New Evidence Cancer Is Contagious

Another side effect of chronic heartburn is a condition known as Barrett's esophagus, which happens when there's a change in the cells of the tissue lining the bottom of the esophagus.

FORBES: Be Cool About Heartburn