prediction of early metastases in individual patients has been attempted by combined evaluation of a battery of recognised parameters such as blood vessel invasion ( bvi ) of tumor cells , barr body frequency ( bbf ) , plasminogen activator ( pa ) , collagenase , estradiol receptors ( er ) , progesterone receptors ( pgr ) , and peroxidase activity ( pra ) in 18 malignant and 3 benign ( control ) breast tumors .
C0007634
cells
C0036867
barr body