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Annals of Surgical Oncology
Published in: Annals of Surgical Oncology 11/2016

01-10-2016 | Breast Oncology

How Often Does Neoadjuvant Chemotherapy Avoid Axillary Dissection in Patients With Histologically Confirmed Nodal Metastases? Results of a Prospective Study

Authors: Anita Mamtani, MD, Andrea V. Barrio, MD, Tari A. King, MD, Kimberly J. Van Zee, MD, George Plitas, MD, Melissa Pilewskie, MD, Mahmoud El-Tamer, MD, Mary L. Gemignani, MD, Alexandra S. Heerdt, MD, Lisa M. Sclafani, MD, Virgilio Sacchini, MD, Hiram S. Cody III, MD, Sujata Patil, PhD, Monica Morrow, MD

Published in: Annals of Surgical Oncology | Issue 11/2016

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Abstract

Background

In breast cancer patients with nodal metastases at presentation, false-negative rates lower than 10 % have been demonstrated for sentinel node biopsy (SLNB) after neoadjuvant chemotherapy (NAC) when three or more negative sentinel nodes (SLNs) are retrieved. However, the frequency with which axillary dissection (ALND) can be avoided is uncertain.

Methods

Among 534 prospectively identified consecutive patients with clinical stages 2 and 3 cancer receiving NAC from November 2013 to November 2015, all biopsy-proven node-positive (N+) cases were identified. Patients clinically node-negative after NAC were eligible for SLNB. The indications for ALND were failed mapping, fewer than three SLNs retrieved, and positive SLNs.

Results

Of 288 N+ patients, 195 completed surgery, with 132 (68 %) of these patients eligible for SLNB. The median age was 50 years. Of these patients, 73 (55 %) were estrogen receptor-positive (ER+), 21 (16 %) were ER− and human epidermal growth factor receptor-2-positive (HER2+), and 38 (29 %) were triple-negative. In four cases, SLNB was deferred intraoperatively. Among 128 SLNB attempts, three or more SLNs were retrieved in 110 cases (86 %), one or two SLNs were retrieved in 15 cases (12 %), and failed mapping occurred in three cases (2 %). In 66 cases, ALND was indicated: 54 (82 %) for positive SLNs, 9 (14 %) for fewer than three negative SLNs, and 3 (4 %) for failed mapping. Persistent disease was found in 17 % of the patients with fewer than three negative SLNs retrieved. Of the 128 SLNB cases, 62 (48 %) had SLNB alone with three or more SLNs retrieved. Among 195 N+ patients who completed surgery, nodal pathologic complete response (pCR) was achieved for 49 %, with rates ranging from 21 % for ER+/HER2− to 97 % for ER−/HER2+ cases, and was significantly more common than breast pCR in ER+/HER2− and triple-negative cases.

Conclusions

Nearly 70 % of the N+ patients were eligible for SLNB after NAC. For 48 %, ALND was avoided, supporting the role of NAC in reducing the need for ALND among patients presenting with nodal metastases.
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Metadata
Title
How Often Does Neoadjuvant Chemotherapy Avoid Axillary Dissection in Patients With Histologically Confirmed Nodal Metastases? Results of a Prospective Study
Authors
Anita Mamtani, MD
Andrea V. Barrio, MD
Tari A. King, MD
Kimberly J. Van Zee, MD
George Plitas, MD
Melissa Pilewskie, MD
Mahmoud El-Tamer, MD
Mary L. Gemignani, MD
Alexandra S. Heerdt, MD
Lisa M. Sclafani, MD
Virgilio Sacchini, MD
Hiram S. Cody III, MD
Sujata Patil, PhD
Monica Morrow, MD
Publication date
01-10-2016
Publisher
Springer International Publishing
Published in
Annals of Surgical Oncology / Issue 11/2016
Print ISSN: 1068-9265
Electronic ISSN: 1534-4681
DOI
https://doi.org/10.1245/s10434-016-5246-8

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