 In our previous research, we have shown that women that have breast cancer have a population of lymphocytes that recognizes specific antigen and there cytoplasmic matrix goes through physical change a short time after exposure in vitro to the same antigen. This change can be measured by polarization changes of fluorescent light emitted by FDA fluorescein diacetate labeled cells. Further test that we performed showed that those differences are also shown in a benign situation that known as indicator for a high risk for developing breast cancer within 10-15 years. The incidence of the expression of these lymphocytes correlates with the histopathological picture as it is related in high risk for the developing the disease. 