<unk>   for<unk><unk>  has not been established.<unk>  may be effective in reducing the incidence of<unk>  adenocarcinoma, especially in Barrett's esophagus, but is left at the physician's discretion.
Esophageal cancer screening
Nasopharyngeal carcinoma screening
Barrett's esophagus screening
Heartburn screening
Zenker's diverticulum screening
Salivary gland tumor screening
Oral cancer screening
Colon polyps screening