Previous evidence has reported down‐regulation of ADAMTS9‐AS1 in ovarian cancer, colon adenocarcinoma and breast cancer,14, 15, 16, 17 further validating our results, and a number of documented studies have also recorded the participation of down‐regulated lncRNAs in pathological processes.33, 34, 35. Here, ADAMTS9 is linked to breast carcinoma.