Letrozole in Treating Breast Cancer in Postmenopausal Women With Stage I, II, or III Breast Cancer Previously Treated With Tamoxifen (GIM4)
RATIONALE: Estrogen can cause the growth of breast cancer cells. Letrozole may fight breast cancer by lowering the amount of estrogen the body makes. It is not yet known which regimen of letrozole is most effective in treating breast cancer in postmenopausal women who have received tamoxifen.
PURPOSE: This randomized phase III trial is comparing different regimens of letrozole to see how well they work in treating postmenopausal women with stage I, stage II, or stage III breast cancer previously treated with tamoxifen.
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||Letrozole Adjuvant Therapy Duration (LEAD) Study: Standard Versus Long Treatment. A Phase III Trial in Post-Menopausal Women With Early Breast Cancer.|
- Disease-free survival [ Time Frame: 6 years after the last patient enters the study ] [ Designated as safety issue: No ]
- Overall survival [ Time Frame: 6 years after the last patient enters the study ] [ Designated as safety issue: No ]
- Safety [ Time Frame: 6 years after the last patient enters the study ] [ Designated as safety issue: Yes ]
|Study Start Date:||August 2005|
|Estimated Primary Completion Date:||August 2015 (Final data collection date for primary outcome measure)|
Active Comparator: Letrozole for 3-2 years
Patients pre-treated with TAM for 2-3 years will receive letrozole 2,5 mg/die for 3-2 years. Total duration of early adjuvant endocrine therapy: 5 years
letrozole for 2-3 years after Tam
Experimental: Letrozole for 5 year
Patients pre-treated with TAM for 2-3 years will receive letrozole 2,5 mg/die for additional 5 years. Total duration of early adjuvant endocrine therapy: 7 years for patients pretreated with 2 years of TAM and 8 years for patients pre-treated with 3 years of TAM
Letrozole for 5 years after Tam
- To compare the disease-free survival of previously treated, post-menopausal women with early-stage breast cancer treated with standard- (2-3 years of tamoxifen followed by 2-3 years of letrozole) versus long-treatment (2-3 years of tamoxifen followed by 5 years of letrozole) adjuvant letrozole.
- To compare the overall survival of these patients.
- To compare the safety of these patients.
OUTLINE: Patients are randomized to 1 or 2 treatment arms.
- Arm I (standard treatment): Patients previously treated with tamoxifen for 2 years receive letrozole for an additional 3 years; patients previously treated with tamoxifen for 3 years receive letrozole for an additional 2 years; and patients previously treated with tamoxifen for 2-3 years receive letrozole , so the total duration of the endocrine treatment (i.e., tamoxifen followed by letrozole) is 5 years.
- Arm II (long treatment): Patients receive letrozole for an additional 5 years regardless of the duration of the previous tamoxifen treatment.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01064635
|Istituto Nazionale per la Ricerca sul Cancro|
|Genoa, Italy, 16132|
|Principal Investigator:||Lucia Del Mastro, MD||National Institute for Cancer Research, Italy|