Numerous studies have reported that lncRNAs play a critical role in different cancers.65, 66, 67, 68 lncRNA MIR503HG inhibits cell proliferation and promotes apoptosis in triple-negative breast cancer (TNBC) cells via the miR-224-5p/HOXA9 axis.69 Here, HOXA9 is linked to triple-negative breast carcinoma.