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Paclitaxel and Trastuzumab With or Without Lapatinib in Treating Patients With Stage II or Stage III Breast Cancer That Can Be Removed by Surgery

Stage IIIC Breast Cancer AJCC v7 Clinical Trial

Official title:
Randomized Phase III Trial of Paclitaxel +Trastuzumab + Lapatinib Versus Paclitaxel + Trastuzumab as Neoadjuvant Treatment of HER2-Positive Primary Breast Cancer

Clinical Trial Summary

This randomized phase III trial studies paclitaxel and trastuzumab with or without lapatinib to see how well they work in treating patients with stage II or stage III breast cancer that can be removed by surgery. Drugs used in chemotherapy, such as paclitaxel, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Monoclonal antibodies, such as trastuzumab, can block tumor growth in different ways. Some block the ability of tumor cells to grow and spread. Others find tumor cells and help kill them or carry tumor-killing substances to them. Lapatinib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Giving paclitaxel with trastuzumab and/or lapatinib before surgery may make the tumor smaller and reduce the amount of normal tissue that needs to be removed. It is not yet known which regimen is more effective in treating patients with breast cancer.

Clinical Trial Description

PRIMARY OBJECTIVE: I. To determine if the pathologic complete response (pCR) in the breast to neoadjuvant weekly paclitaxel with trastuzumab plus lapatinib (THL) is 20% greater than the pCR to weekly paclitaxel with trastuzumab alone (TH). SECONDARY OBJECTIVES: I. To determine the pathologic complete response in the breast and axilla, using American Joint Committee on Cancer (AJCC) Tumor, Lymph Nodes and Metastasis (TMN) criteria (version 6), to neoadjuvant weekly paclitaxel plus human epidermal growth factor 2 (HER2)- targeted therapy in patients with HER2-positive operable breast cancer. II. To evaluate residual cancer burden (RCB) as a predictor of long term relapse free survival (RFS) and overall survival (OS). III. To document the toxicity of all chemotherapeutic regimens (THL, TH). IV. To determine the correlation between clinical, radiographic and pathologic response. V. To compare overall survival (OS), relapse free survival (RFS) and time to first failure (TFF) among the treatment groups. VI. To obtain blood, fresh frozen and fixed tumor tissue to test specific hypotheses for which biomarker data exist and to evaluate biomarkers in blood, serum and tissue that are likely to influence response to and toxicity of trastuzumab alone or trastuzumab plus lapatinib, when given with paclitaxel. VII. To determine the surgical practice patterns for breast conservation and sentinel lymphadenectomy in patients undergoing neoadjuvant chemotherapy. VIII. To determine the radiotherapy practice patterns for post-mastectomy and regional nodal irradiation in patients undergoing neoadjuvant chemotherapy. IX. To evaluate pharmacogenomic determinants of toxicity. OUTLINE: Patients are randomized to 1 of 3 treatment arms. ARM I: Patients receive trastuzumab IV over 30-90 minutes and paclitaxel IV over 1 hour once weekly and lapatinib ditosylate orally (PO) once daily for 16 weeks in the absence of disease progression or unacceptable toxicity. ARM II: Patients receive trastuzumab and paclitaxel as in arm I. ARM III: Patients receive paclitaxel and lapatinib ditosylate as in arm I. (Discontinued as of 6-15-11) Within 42 days after completion of neoadjuvant therapy, patients in both arms undergo definitive surgery (breast conservation or total mastectomy). After completion of study treatment, patients are followed every 6 months for 2 years and then annually for up to 10 years. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT00770809
Study type Interventional
Source National Cancer Institute (NCI)
Contact
Status Active, not recruiting
Phase Phase 3
Start date December 1, 2008
Completion date July 10, 2024
View Details
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