Nick Tsaclas, the patient for the test on "Good Morning America," had been already diagnosed with Barrett's and a precancerous lesion in his throat was plainly visible during the test.
If a doctor discovers Barrett, the patient may have to go back for follow-up exams, "basically, for the rest of your life," "GMA's" medical contributor Dr. Tim Johnson said.
"Usually with a gastroenterologist, they will keep an eye on it, biopsy it," he said. "If it starts to change into early cancer, they will leap into action maybe with a surgical procedure."
Johnson said people can reduce their risk of cancer of the esophagus by watching their weight and their diet and by cutting back on excessive drinking and smoking.