<prompt> True about Barrets esophagus -a Premalignantb Predispose to sq. cell Cac Can be diagnosed by seeing under endoscoped Biopsy is necessary to diagnosee Stricture may be present in high esophagusbcebdeabcdacde  <response>: Diagnosis of Barretts esophagus- The diagnosis of Barretts esophagus is suspected on endoscopy when there is difficulty in visualizing the squamo-columnar junction at its normal location and by the appearance of pink, more luxuriant columnar mucosa in the lower esophagus instead of gray-pink squamous mucosa.- the diagnosis is confirmed by biopsy.Strictures in Barretts esophagus occur at the squamo-columnar junction and move high up as the squamo-columnar junction moves up with progressive injury. 