MKI67 and cancer: Here, the Ki67 labeling index (Li) ranged from 1.5% (in BCAR1 negative cancer) to 4.0% (in strongly BCAR1 positive cancer, p < 0.0001), while this association was weaker (2.2% in BCAR1 negative vs. 3.2% in BCAR1 strong, p < 0.0001) in ERG-positive cancer.