Objective: To evaluate immunohistochemical, hysteroscopic, and histological findings in postmenopausal women taking tamoxifen for breast cancer.
Methods: Forty postmenopausal women taking 20 mg/day tamoxifen for breast cancer underwent hysteroscopy and endometrial biopsy from January 2000 to December 2003. Medical records and paraffin blocks were analyzed retrospectively, and Ki-67, estrogen receptors (ERs), and progesterone receptors were measured using an immunohistochemical technique.