system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
All are true about carcinoma oesophagus except
assistant
The correct answer is  Squamous cell carcinoma generally affects the upper two-thirds of the oesophagus and adenocarcinoma the lower third. Worldwide, squamous cell cancer is most common, but adenocarcinoma predominates in the west and is increasing in incidence.Ref: Bailey and Love 27e pg: 1086