The results showed that the high expression of CHRM2 was negatively correlated with EC grading and staging (Figure S2A) (Table 2); the high expression of GRIN1 was negatively correlated with EC grading and staging (Figure S2B) (Table 3); the high expression of L1CAM was positively correlated with EC tumor grading and staging (Figure S2C) (Table 4); the high expression of SEMA4F was positively correlated with EC tumor grading and staging (Figure S2D) (Table 5). Here, CHRM2 is linked to neoplasm.