OBJECTIVES:
I. Determine the time to locoregional recurrence, time to completion of treatment, and overall survival in women with HER-2+ stage IIIA or IIIB or regional stage IV breast cancer treated with doxorubicin and cyclophosphamide with or without dexrazoxane, followed by paclitaxel with or without trastuzumab (Herceptin), followed by surgery and radiotherapy with or without trastuzumab.
II. Determine whether addition of trastuzumab to paclitaxel therapy improves response at 24 weeks of therapy in these patients.
III. Determine whether addition of trastuzumab to paclitaxel therapy increases the rate of cardiotoxicity in these patients.
IV. Determine whether addition of dexrazoxane to doxorubicin and cyclophosphamide compromises response in these patients.
V. Determine whether addition of dexrazoxane to doxorubicin and cyclophosphamide reduces the rate of cardiotoxicity in these patients.
VI. Determine whether long-term trastuzumab after local therapy improves disease-free survival in these patients.
VII. Determine whether long-term trastuzumab after local therapy increases the rate of cardiotoxicity in these patients.
VIII. Determine the occurrence of any grade 3 or higher toxicity, second malignancies, acute myelogenous leukemia, or myelodysplastic syndrome in patients treated with these regimens.
IX. Determine the eventual rate of breast conservation in those patients considered candidates for breast conservation prior to neoadjuvant treatment.
X. Determine the clinical response after doxorubicin and cyclophosphamide with or without dexrazoxane and the clinical/mammographic/ultrasound response after paclitaxel with or without trastuzumab, compared to the pathologic response at definitive surgery in these patients.
OUTLINE: This is a randomized, open-label, multicenter study. Patients are stratified according to stage (inflammatory vs noninflammatory inoperable stage III/ regional stage IV vs operable stage III). Patients are randomized to 1 of 8 treatment arms.
Arm I: Patients receive dexrazoxane IV over 10-20 minutes, doxorubicin IV over 5-10 minutes, and cyclophosphamide IV over 30 minutes on days 1, 22, 43, and 64. Patients receive paclitaxel IV over 1 hour and trastuzumab (Herceptin) IV over 30-90 minutes on days 85, 92, 99, 106, 113, 120, 127, 134, 141, 148, 155, and 162. Approximately 1-2 weeks after completion of neoadjuvant chemotherapy, patients undergo breast conservation surgery, modified radical mastectomy, or mastectomy. Patients with unacceptable toxicity or locoregional disease progression may undergo surgery prior to week 24 (i.e., completion of neoadjuvant chemotherapy). Beginning 2-4 weeks after breast conservation surgery or 3-5 weeks after mastectomy, patients undergo radiotherapy daily 5 days a week for 6-8 weeks. Patients receive long-term trastuzumab IV over 30-90 minutes weekly for 40 weeks beginning on week 36 (day 254).
Arm II: Patients receive dexrazoxane, doxorubicin, and cyclophosphamide as in arm I. Patients receive paclitaxel (without trastuzumab) as in arm I. Patients undergo surgery and radiotherapy as in arm I. Patients receive long-term trastuzumab as in arm I.
Arm III: Patients receive dexrazoxane, doxorubicin, and cyclophosphamide as in arm I. Patients receive paclitaxel and trastuzumab as in arm I. Patients undergo surgery and radiotherapy as in arm I. Patients undergo observation only for 40 weeks after completion of radiotherapy.
Arm IV: Patients receive dexrazoxane, doxorubicin, and cyclophosphamide as in arm I. Patients receive paclitaxel as in arm II. Patients undergo surgery and radiotherapy as in arm I. Patients undergo observation as in arm III.
Arm V: Patients receive doxorubicin and cyclophosphamide (without dexrazoxane) as in arm I. Patients receive paclitaxel and trastuzumab as in arm I. Patients undergo surgery and radiotherapy as in arm I. Patients receive long-term trastuzumab as in arm I.
Arm VI: Patients receive doxorubicin and cyclophosphamide as in arm V. Patients receive paclitaxel as in arm II. Patients undergo surgery and radiotherapy as in arm I. Patients receive long-term trastuzumab as in arm I.
Arm VII: Patients receive doxorubicin and cyclophosphamide as in arm V. Patients receive paclitaxel and trastuzumab as in arm I. Patients undergo surgery and radiotherapy as in arm I. Patients undergo observation as in arm III.
Arm VIII: Patients receive doxorubicin and cyclophosphamide as in arm V. Patients receive paclitaxel as in arm II. Patients undergo surgery and radiotherapy as in arm I. Patients undergo observation as in arm III.
Treatment continues in all arms in the absence of distant disease progression. Beginning within 12 weeks of completion of neoadjuvant chemotherapy, hormone receptor-positive patients may receive oral tamoxifen daily for 5 years.
Patients are followed every 6 months for 5 years and then annually for 5 years.
PROJECTED ACCRUAL: A total of 396 patients will be accrued for this study within 4 years.
