Further classification of breast cancer tissues according to the TNM stages revealed that the expression of DANCR was markedly elevated in advanced tumors (P < 0.05, comparing tumors of stage III/IV (n = 26) with those of stage I/II (n = 20); Fig. 1B) and also in those positive for lymph node metastasis (n = 32; P < 0.05, when compared with tumors negative for lymph node metastasis (n = 14); Fig. 1C). Here, DANCR is linked to metastatic malignant neoplasm in the lymph nodes.