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Role of Imaging in Neoadjuvant Therapy for Breast Cancer

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Abstract

Neoadjuvant chemotherapy (NAC) involves administration of chemotherapeutic agents to patients with newly diagnosed breast cancer prior to definitive surgical treatment. Assessment of disease response to chemotherapeutic agents in vivo prior to any surgical intervention is necessary as medical oncologists are commonly tailoring or changing therapy during NAC based on response. It can also maximize the pathologic complete response (pCR) rate, resulting in more women undergoing breast conservation rather than mastectomy. Although some studies show a pCR to NAC in only 13–26 % of women, recent studies have shown higher pCR rates, especially for HER2-positive disease treated with targeted anti-HER2 therapy. Thus, accurate imaging tools for quantifying disease response are critical in the evaluation and management of patients undergoing NAC. There is currently no standard imaging method for monitoring response to therapy. Response to therapy tends to vary by tumor subtype and can be accurately assessed on imaging. We review the role of imaging before and after neoadjuvant therapy and discuss the advantages and limitations of currently available modalities, including mammography, ultrasonography, magnetic resonance imaging, and nuclear imaging.

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Correspondence to Priscilla J. Slanetz MD, MPH, FACR.

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Acknowledgment: This educational review series, “Neoadjuvant Therapy in Breast Cancer” is supported by an educational grant from Genentech, Inc. The Society of Surgical Oncology offers CME/MOC for this educational review series. Visit moc.surgonc.org for additional information.

Annals of Surgical Oncology educational reviews represent the journal’s commitment to the peer review and publication of high quality research necessary to define the safety, toxicity, or effectiveness of potential therapeutic agents compared with conventional alternatives.

This Educational Review Series may include information regarding the use of medications that may be outside the approved labeling for these products. Physicians should consult the current prescribing information for these products. Authors of Annals of Surgical Oncology educational reviews are provided at the time of article solicitation with this statement regarding off-label pharmaceutical information and research.

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Dialani, V., Chadashvili, T. & Slanetz, P.J. Role of Imaging in Neoadjuvant Therapy for Breast Cancer. Ann Surg Oncol 22, 1416–1424 (2015). https://doi.org/10.1245/s10434-015-4403-9

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