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Annals of Surgical Oncology
Published in: Annals of Surgical Oncology 8/2016

01-08-2016 | Breast Oncology

A Phase II Trial Exploring the Success of Cryoablation Therapy in the Treatment of Invasive Breast Carcinoma: Results from ACOSOG (Alliance) Z1072

Authors: Rache M. Simmons, MD, Karla V. Ballman, PhD, Charles Cox, MD, Ned Carp, MD, Jennifer Sabol, MD, Rosa F. Hwang, MD, Deanna Attai, MD, Michael Sabel, MD, David Nathanson, MD, Andrew Kenler, MD, Linsey Gold, MD, Cary Kaufman, MD, Linda Han, MD, Aaron Bleznak, MD, J. Stanley Smith, MD, Dennis Holmes, MD, Bruno Fornage, MD, Carisa Le-Petross, MD, Syed Hoda, MD, Linda McCall, MS, Kelly K. Hunt, MD, on behalf of the ACOSOG investigators

Published in: Annals of Surgical Oncology | Issue 8/2016

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Abstract

Background

Cryoablation is a well-established technique to treat fibroadenomas. Pilot studies suggest this could be an effective non-surgical treatment for breast cancer. American College of Surgeons Oncology Group Z1072 is a phase II trial exploring the effectiveness of cryoablation in the treatment of breast cancers.

Methods

The primary endpoint of Z1072 was the rate of complete tumor ablation, defined as no remaining invasive breast cancer (IBC) or ductal carcinoma in situ (DCIS) on pathologic examination of the targeted lesion. A secondary objective was to evaluate the negative predictive value of magnetic resonance imaging (MRI) to determine residual IBC or DCIS. Eligible patients included those with unifocal invasive ductal breast cancer ≤2 cm, with <25 % intraductal component and tumor enhancement on MRI. A total of 19 centers contributed 99 patients, of which 86 patients (87 breast cancers) were evaluable for data analysis.

Results

Final pathology results, regardless of whether residual IBC/DCIS was in the targeted ablation zone or elsewhere in the breast, showed successful ablation in 66/87 (75.9 %) cancers. The 90 % confidence interval for the estimate of successful cryoablation was 67.1–83.2, with the one-sided lower-sided 90 % CI of 69.0. The negative predictive value of MRI was 81.2 % (90 % CI 71.4–88.8). When multifocal disease outside of the targeted cryoablation zone was not defined as an ablation failure, 80/87 (92 %) of the treated cancers had a successful cryoablation.

Conclusion

Further studies with modifications on the Z1072 protocol could be considered to evaluate the role for cryoablation as a non-surgical treatment of early-stage breast cancer.
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Metadata
Title
A Phase II Trial Exploring the Success of Cryoablation Therapy in the Treatment of Invasive Breast Carcinoma: Results from ACOSOG (Alliance) Z1072
Authors
Rache M. Simmons, MD
Karla V. Ballman, PhD
Charles Cox, MD
Ned Carp, MD
Jennifer Sabol, MD
Rosa F. Hwang, MD
Deanna Attai, MD
Michael Sabel, MD
David Nathanson, MD
Andrew Kenler, MD
Linsey Gold, MD
Cary Kaufman, MD
Linda Han, MD
Aaron Bleznak, MD
J. Stanley Smith, MD
Dennis Holmes, MD
Bruno Fornage, MD
Carisa Le-Petross, MD
Syed Hoda, MD
Linda McCall, MS
Kelly K. Hunt, MD
on behalf of the ACOSOG investigators
Publication date
01-08-2016
Publisher
Springer International Publishing
Published in
Annals of Surgical Oncology / Issue 8/2016
Print ISSN: 1068-9265
Electronic ISSN: 1534-4681
DOI
https://doi.org/10.1245/s10434-016-5275-3

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