MIR31HG and metastatic malignant neoplasm in the lymph nodes: Zheng et al. (2019) performed research with 88 patients and demonstrated that the expression of MIR31HG also exhibited a close relationship with histological differentiation grade and lymph node metastasis in non-small cell lung cancer (NSCLC). In agreement with Zheng’s result, patients with MIR31HG overexpression are likely to have unfavourable OS (Dandan et al., 2019).