AGR2 and squamous cell carcinoma: When segregated by tumor types, high AGR2 expression was more pronounced in adenocarcinoma: 62 % for grade 1, 62 % for grade 2, and 51 % for grade 3; whereas in squamous carcinoma: 19 % for grade 1, 20 % for grade 2, and 31 % for grade 3.