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Exemestane as primary systemic treatment for hormone receptor positive post-menopausal breast cancer patients: a phase II trial of the Austrian Breast and Colorectal Cancer Study Group (ABCSG-17).

Abstract：

BACKGROUND:A multicenter phase II study was conducted to analyze the clinical activity of the steroidal aromatase inhibitor exemestane in the neoadjuvant treatment of post-menopausal women with strongly ER- and/or PgR- positive operable breast cancer. PATIENTS AND METHODS:From September 2000 to December 2003, 80 women were recruited for treatment with exemestane 25 mg once daily for 4 months. The primary end-point was the clinical response rate according the WHO criteria; the secondary end-points included toxicity and the number of patients who qualified for breast conserving surgery at the end of treatment, comparability of evaluation methods for response, potential alterations of hormone receptor and Her2/neu status during treatment. RESULTS:On an intention to evaluate analysis, according to the prespecified criteria the overall clinical objective response rate was 34%, the pCR rate was 3% and the rate of breast conserving surgery was 76%. When sonographic and mammographic longitudinal measurements were included in patients with missing palpation data, response rates were 38% and 41%, respectively. The tumor response was independent of the Her2/neu status which remained unchanged during treatment. In contrast, while the ER expression remained unaltered, downregulation of the PgR was observed. The treatment was well tolerated with no grade 3 and 4 toxicities except gastrointestinal (one grade 3 case) and hot flushes (two grade 3 cases). CONCLUSION:This study shows that exemestane is effective and safe as a preoperative therapy in post-menopausal patients with strongly hormone receptor-positive breast cancer.

journal_name

Breast Cancer Res Treat

journal_title

Breast cancer research and treatment

authors

Mlineritsch B,Tausch C,Singer C,Luschin-Ebengreuth G,Jakesz R,Ploner F,Stierer M,Melbinger E,Menzel C,Urbania A,Fridrik M,Steger G,Wohlmuth P,Gnant M,Greil R,Austrian Breast, Colorectal Cancer Study Group (ABCSG).

doi

10.1007/s10549-007-9843-x

subject

Has Abstract

pub_date

2008-11-01 00:00:00

pages

203-13

issue

eissn

0167-6806

issn

1573-7217

journal_volume

112

pub_type

杂志文章,多中心研究

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Exemestane as primary systemic treatment for hormone receptor positive post-menopausal breast cancer patients: a phase II trial of the Austrian Breast and Colorectal Cancer Study Group (ABCSG-17).