As shown in Table 1, altered circRNA levels in tissues of GC patients were significantly associated with gender (P = .0470), tumor lesion diameter (P = .0410), differentiation grade (P = .0009), T stage (P = .0003), distant metastasis (P = .0000), TNM stage (P = .0000), lymphatic metastasis (P = .0001), CEA (P = .0012), and CA199 levels (P = .0004). Here, CEACAM5 is linked to gastric cancer.