MIR9-2HG and breast cancer: Among the non‐coding RNAs, long non‐coding RNAs (lncRNAs) are transcripts with more than 200 nucleotides in length.5 Aberrant lncRNA expression is involved in various types of human cancers, including breast cancer, prostate cancer and colorectal cancer.6 LINC00461, a human homolog of the mouse lncRNA C130071C03Rik, is reported to present with an overexpressed expression profile in human glioma tissues.7 Furthermore, LINC00461 was predicted to be up‐regulated in lung adenocarcinoma in the Cancer Genome Atlas (TCGA).