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  • Title: Does tamoxifen use affect prognosis in breast cancer patients who develop endometrial cancer?
    Author: Slomovitz BM, Sun CC, Ramirez PT, Bodurka DC, Diaz P, Lu KH.
    Journal: Obstet Gynecol; 2004 Aug; 104(2):255-60. PubMed ID: 15291996.
    Abstract:
    OBJECTIVE: The use of tamoxifen to prevent breast cancer and decrease recurrence is not controversial. However, the effect that tamoxifen may have in women with a history of breast cancer in whom endometrial cancer develops is unclear. The purpose of this study was to estimate whether a history of tamoxifen use is a prognostic factor for such patients. METHODS: Between 1990 and 2002, patients seen at The University of Texas M. D. Anderson Cancer Center with a history of breast cancer who developed endometrial cancer were identified. Medical records were reviewed to identify clinical, pathologic, and outcome information. RESULTS: Eighty-nine patients with a history of breast cancer in whom endometrial carcinoma developed were identified. Fifty-two percent (46/89) had a history of tamoxifen use (median duration 48 months; range 2-120 months). There were no significant differences in the clinical or pathologic features between tamoxifen users and nonusers. A history of tamoxifen use was associated with a shorter interval from breast cancer to endometrial cancer diagnosis (77.2 versus 121.3 months for nonusers; P =.01). There was no significant difference in overall survival between tamoxifen users and nonusers (39.2 months versus 48.3 months, P =.27), and there was no difference in endometrial cancer-specific survival duration between tamoxifen users and nonusers (55.7 versus 51.0 months, P =.92). CONCLUSION: Among tamoxifen users, the interval from breast cancer to endometrial cancer diagnosis was significantly shorter than that in nonusers. In this cohort, a history of tamoxifen use was not associated with a worse overall or disease-specific survival.
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