This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': "All except one are true regarding Barret'soesophagus \nSelect and explain. \nA. More incidence of sq. cell ca, B. Metaplasia, C. Columnar epithelium, D. Involves lower oesophagus", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans is 'a' ie More incidence of sq. cell ca There is increased incidence of adenocarcinoma in Barret's esophagus.Barrett's esophagus is a premalignant condition with increased incidence of adenocarcinoma of esophagus. The risk of adenocarcinoma increases with increasing length of columnar-lined epitheliumAlso rememberBarrett's esophagus is the single most impoant risk factor for adenocarcinoma of esophagus.The adenocarcinoma develops at the squamo-columnar junction (-85%) or within 2 cm iof the junction.", 'role': 'assistant'}]