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Erschienen in: Annals of Surgical Oncology 10/2016

24.06.2016 | Breast Oncology

A Population-Based Study of the Effects of a Regional Guideline for Completion Axillary Lymph Node Dissection on Axillary Surgery in Patients with Breast Cancer

verfasst von: Miriam W. Tsao, MD, Sylvie D. Cornacchi, MSc, Nicole Hodgson, MD, MSc, Marko Simunovic, MD, MPH, Lehana Thabane, PhD, Ji Cheng, MSc, Mary Ann O’Brien, PhD, Barbara Strang, MD, MSc, Som D. Mukherjee, MD, MSc, Peter J. Lovrics, MD

Erschienen in: Annals of Surgical Oncology | Ausgabe 10/2016

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Abstract

Introduction

Evidence from the American College of Surgeons Oncology Group (ACOSOG) Z0011 trial suggests completion axillary lymph node dissection (cALND) after positive sentinel lymph node biopsy (+SLNB) does not improve outcomes in select patients, leading to practice variation. A multidisciplinary group of surgeons, oncologists, and pathologists developed a regional guideline for cALND which was disseminated in August 2012. We assessed the impact of Z0011 and the regional guideline on cALND rates.

Methods

Consecutive invasive breast cancer cases undergoing SLNB were reviewed at 12 hospitals. Patient, tumor, and process measures were collected for three time periods: TP1, before publication of Z0011 (May 2009–August 2010); TP2, after publication of Z0011 (March 2011–June 2012); and TP3, after guideline dissemination (January 2013–April 2014). Cases were categorized by whether they met the guideline criteria for cALND (i.e. ≤50 years, mastectomy, T3 tumor, three or more positive sentinel lymph nodes [SLNs]) or not (e.g. age > 50 years, breast-conserving surgery, T1/T2 tumor, and one to two positive SLNs).

Results

The SLNB rate increased from 56 % (n = 620), to 70 % (n = 774), to 78 % (n = 844) in TP1, TP2, and TP3, respectively. Among cases not recommended for cALND using the guideline criteria, cALND rates decreased significantly over time (TP1, 71 %; TP2, 43 %; TP3, 17 %) [p < 0.001]. The cALND rate also decreased over time among cases recommended to have cALND using the guideline criteria (TP1, 92 %; TP2, 69 %; TP3, 58 %) [p < 0.001]. Based on multivariable analysis, age and nodal factors appeared to be significant factors for cALND decision making.

Conclusion

Publication of ACOSOG Z0011 and regional guideline dissemination were associated with a marked decrease in cALND after +SLNB, even among several cases in which the guideline recommended cALND.
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Metadaten
Titel
A Population-Based Study of the Effects of a Regional Guideline for Completion Axillary Lymph Node Dissection on Axillary Surgery in Patients with Breast Cancer
verfasst von
Miriam W. Tsao, MD
Sylvie D. Cornacchi, MSc
Nicole Hodgson, MD, MSc
Marko Simunovic, MD, MPH
Lehana Thabane, PhD
Ji Cheng, MSc
Mary Ann O’Brien, PhD
Barbara Strang, MD, MSc
Som D. Mukherjee, MD, MSc
Peter J. Lovrics, MD
Publikationsdatum
24.06.2016
Verlag
Springer International Publishing
Erschienen in
Annals of Surgical Oncology / Ausgabe 10/2016
Print ISSN: 1068-9265
Elektronische ISSN: 1534-4681
DOI
https://doi.org/10.1245/s10434-016-5310-4

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