[Lymphocyte subsets and interleukin-2 receptor in breast cancer patients]

The lymphocyte subsets and IL-2R (p55/Tac) in breast cancer patients were analyzed using monoclonal antibody and flow cytometry until 6 post-operative month. Results were as follows: 1. Lymphocyte fraction of CD3, 4, 8 was maintained from pre-operative to post-operative 6 month. 2. IL-2R value was lower in recurrence group than in breast benign disease group and it was lower. In pre-operative IL-2R in Stage III group than in Stage I and, Stage II. It was lower in DNA aneuploidy group than in DNA diploidy group. 3. At the post-operative 6 month, IL-2R was higher in Stage III group, ly-factor positive group, v-factor positive group and DNA aneuploidy group than in recurrence group. When breast cancer recurred after resection, IL-2R value returned to initial value. In conclusion, IL-2R may be possibly one of the factors of recurrence of breast cancer.