Clinico-pathological correlation analysis indicated that the positive expression rate of PTPRCAP protein was not significantly associated with patient age, gender, or lymph node metastasis status (all P > 0.05), but showed significant associations with TNM stage and histological differentiation grade (P < 0.05; Table 1). The gene discussed is PTPRCAP; the disease is metastatic malignant neoplasm in the lymph nodes.