PTP4A1 and metastatic malignant neoplasm in the lymph nodes: Based on the above single factor results, multivariate regression analysis of the expression level of PTP4A1+MCTCs revealed that advanced TNM stage (odds ratio, OR = 12.063) and lymph node metastasis (OR = 13.541) were influencing factors of PTP4A1+MCTCs expression disorders in esophageal cancer patients (P < .05), as shown in Table 3.