The adenocarcinoma of esophagus-develops in -
Adenocarcinoma of esophagus almost always arises in Barrett's esophagus.
Other option i.e. long standing achalasia, corrosive stricture and alcohol abuse are risk factors for squamous cell Ca of esophagus
Barret's esophagus
Long standing achalasia
Corrosive stricture
Alcohol abuse