BCAR1 and neoplasm: Some oncogenes, such as ErbB2(erb‐b2 receptor tyrosine kinase 2), PTEN(phosphatase and tensin homolog), and PI3KCA(phosphatidylinositol‐4,5‐bisphosphate 3‐kinase catalytic subunit alpha) stimulate tumor progression via phosphorylation of BCAR1.5