Multivariate logistic regression also ulteriorly demonstrated that PSD3 expression (P=0.028), primary neoplasm focus type (P=0.004), lymph node metastasis (P<0.001), and metastasis (P=0.02) were associated with the incidence rate of classical histological type (Table 3). The gene discussed is PSD3; the disease is metastatic malignant neoplasm in the lymph nodes.