Although the percentage of higher expression of PLCγ1 in human lung adenocarcinoma specimens with regional lymph node metastasis (N1, N2, 73.91%) was more than that in non-metastatic specimens (N0,48.48%), there was no significance between them, maybe due to the smaller number of samples in the tissue microarray (Table 1, p=0.057>0.05). The gene discussed is PLCG1; the disease is metastatic malignant neoplasm in the lymph nodes.