1, 1 Adenocarcinoma \n 2, 2 Mucinous adenocarcinoma \n 3, 3 Medullary carcinoma \n 4, 4 Signet ring cell carcinoma \n 5, 5 Small cell carcinoma \n 6, 6 Squamous cell carcinoma \n 7, 7 Adenosquamous carcinoma \n 8, 8 Others \n 9, 9 Adenoma