To understand how tRF‐1‐Ser and MBNL1 interact and regulate biological functions, we analysed transcriptome data from TCGA containing 1231 breast cancer cases, categorised based on the average TPM values of MBNL1 into high‐ and low‐expression groups (MBNL1_high and MBNL1_low, respectively). This evidence concerns the gene MBNL1 and breast carcinoma.