It is noteworthy that aberrant ALDH activity or expression has been detected in different solid tumors, including breast cancer,9 colorectal cancer (CRC),10 lung cancer,11 head‐and‐neck squamous cell carcinoma (HNSCC),12, 13 prostate cancer (PCa),14 pancreatic cancer,15 bladder cancer,16 and glioblastoma (GBM).17 This evidence concerns the gene LDHA and breast cancer.