File Name : fig s1.tif

Caption : figure s1：heat map of peak areas of different raman features between patients with gastric cancer, colorectal cancer, and non-tumor. (nt: non-tumor; cc: colorectal cancer; gc: gastric cancer)

File Name : fig s2.tif

Caption : figure s2：mean raman spectra of patients with different degrees of differentiation and different stages of gastric and colorectal cancers. a). mean raman spectra of sera from patients with different degrees of differentiation of gastric cancer. b). mean raman spectra of sera from patients with different stages of gastric cancer. c). average raman spectra of sera from patients with different differentiation of colorectal cancer. d). mean raman spectra of sera from patients with different stages of colorectal cancer.