CEACAM5 and metastatic malignant neoplasm in the lymph nodes: We found that the expression levels of hsa_circ_0001811 in gastric cancer tissues were related to CEA, tissue differentiation, and lymph node metastasis (Table 1), while plasma hsa_circ_0001811 level was related to CA19‐9, lymph node metastasis, and distant metastasis and age (Table 2).