RNU2-1 and metastatic malignant neoplasm in the lymph nodes: Significantly lower expression of RNU2-1 was observed in lymph node metastasis-positive samples (n = 4) compared with negative samples (n = 14) (p = 0.0337), along with a trend toward lower levels of SCARNA2 (p = 0.0710) and SNORD15B (p = 0.0559), compared to LNM-negative samples.