HOTTIP and breast cancer: HOTTIP had a higher expression (median FC (IQR) was 3.05 (0.09–10.20)), while miR-615-3p had a lower expression (median FC (IQR) was 0.19 (0.004–2.00)) in the serum of BC patients compared to the healthy ones (p < 0.001 for HOTTIP and miR-615-3p).