Similarly, in basal-like tumor forming cell lines, the CD44+/24–/low cells were enriched in BRCA1-defective HCC1937 (52.7 ± 1.84 %) when compared to HCC1937/wt BRCA1 (30.6 ± 5.0 %) that possesses a wild type BRCA1. This evidence concerns the gene BRCA1 and neoplasm.