MALAT1 and metastatic malignant neoplasm in the lymph nodes: The increased expression level of MALAT1 was significantly associated with lymph node metastasis (pooled OR = 2.335, 95% CI 1.606–3.395, P = 0.000), tumour size (pooled OR = 1.875, 95% CI 1.257–2.795, P = 0.002), distant metastasis (pooled OR = 2.456, 95% CI 1.407–4.286, P = 0.002) and TNM stage (pooled OR = 2.034, 95% CI 1.111–3.724, P = 0.021).