<prompt> False about Barretts oesophagus is:In short segment Barretts there is less than 3 cm of columnar epitheliumBarretts ulcer occurs just above the squamocolumnar junctionIf a peptic stricture occurs in Barretts oesophagus it always occurs at the new squamocolumnar junctionIt is a premalignant condition  <response>: Barretts ulcer is an ulcer in the columnar lined portion of a Barretts oesophagus.These are distinct from the more usual erosions of reflux oesophagitis that always occur at or just above the squamocolumnar junction. 