A randomized trial of letrozole in postmenopausal women after five years of tamoxifen therapy for early-stage breast cancer
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View abstract on PubMed
Summary
This summary is machine-generated.Adding letrozole therapy after standard tamoxifen treatment significantly improves disease-free survival in postmenopausal women with breast cancer. This extended treatment shows promising results for preventing cancer recurrence.
Area Of Science
- Oncology
- Endocrinology
Background
- Five years of tamoxifen therapy improves survival in hormone-dependent breast cancer but longer durations do not.
- Aromatase inhibitors like letrozole may enhance outcomes post-tamoxifen by suppressing estrogen.
Purpose Of The Study
- To evaluate the efficacy of five years of letrozole therapy in postmenopausal women after completing five years of tamoxifen for breast cancer.
Main Methods
- A double-blind, placebo-controlled trial was conducted.
- The primary endpoint was disease-free survival.
- 5187 postmenopausal women were enrolled with a median follow-up of 2.4 years.
Main Results
- Letrozole significantly improved disease-free survival (93% vs. 87% at 4 years, P<0.001).
- Fewer recurrences or new primary cancers were observed in the letrozole group (75 vs. 132).
- Overall survival did not differ significantly (P=0.25); however, hot flashes and arthralgia were more frequent with letrozole.
Conclusions
- Letrozole therapy following standard tamoxifen treatment significantly enhances disease-free survival.
- The trial was terminated early due to the clear benefit observed in the letrozole arm.
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