Barrett's oesophagus is -
Ans. is 'a i.e., Lower esophagus lined by columnar ephithelium Barrett's esophagus Is metaplastic change ,of gastro esophageal mucosa from normal squamous epithelium to columanar epithelium, in response to chronic gastro -esophageal reflux. o The function between squamous esophageal mucosa and gastric mucosa moves proximally . o Three types of columnar epithelium have been described in Barrett's esophagus : (i) Intetinal type -the most common type (ii) The junctional type and (iii)The gastiric fundic type o Barrett's esophagus is a premalignant codition for adenocarcinoma esophagus o The hallmark of inestinal metaplasia is the presence of intestinal goblet cells.
Lower oesophagus lined by columnar epithelium
Upper oesophagus lined by columnar epithelium
Lower oesophagus lined by ciliated epithelium epithelium
Lower oesophagus lined by ciliated epithelium