NOTCH1 and metastatic malignant neoplasm in the lymph nodes: The same meta-analysis indicated no statistical correlation between Notch1 and AC/SCC (pooled OR = 0.96, 95% CI: 0.75–1.22, p = 0.068 and I2 = 42.1%) and identified a greater possibility of lymph node metastasis (LNM) with higher tumor stages associated with Notch1 overexpression in NSCLC (pooled OR = 3.20, 95% CI: 1.81–5.65, p = 0.798 and I2 = 0.0%; pooled OR = 1.62, 95% CI: 1.00–2.62, p = 0.251 and I2 = 25.5%).