KRT7 and breast angiosarcoma: Induction RRV influence on expression of cytokeratin-7: in this study, a trial groups with a median value of expression of CK-7 quantitatively lower in the trial groups than the control groups with general results p<0.05, which shows the influence of the RRV induced changes in the expression of CK-7 murine model of BA day 3, 7, 14 and 21 after induction compared to the control (Table 2).