Digestive Disease Center;
Showa University Koto Toyosu Hospital;
Department of Surgery;
Digestive Disease Center;
Showa University Koto Toyosu Hospital;
Stem Cell Business Development Department;
Nikon Corporation;
Sakae-ku;
Department of Pathology;
Showa University Koto Toyosu Hospital;
Division of Cellular and Molecular Pathology;
Niigata University Graduate School of Medical and Dental Sciences;
Label-free; analysis; Raman; spectroscopy; Histopathological; examination; Gastric; cancer;