This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Stomach & Duodenum, Subject name: Surgery
GE junction tumor is: 
Select and explain. 
A. Siewe type I, B. Siewe type II, C. Siewe type III, D. Siewe type IV
B: Siewe type II
Answer: B: Siewe type II 
Explanation: Siewe Classification Type Adenocarcinoma of Location Type I Distal esophagus 1-5 cm above cardia Type II Real Cardia 1 cm above and 2 cm below cardia Types III Sub-Cardial Stomach 2-5 cm below cardia Type III generally have a worse prognosis.