Figure 1From: Serum estradiol should be monitored not only during the peri-menopausal period but also the post-menopausal period at the time of aromatase inhibitor administrationSerum E2 level in cases with E2 rebounded. In 4 patients (Nos. 2, 3, 5, 6), the E2 level had increased at 6 months after starting AI (anastrozole) therapy, and in 2 patients (Nos. 1, 4), the E2 level had increased at 9 months after starting AI therapy.Back to article page