Factors impacting the accuracy of intra-operative evaluation of sentinel lymph nodes in breast cancer

Catherine L. Akay, Constance Albarracin, Tiffany Torstenson, Roland Bassett, Elizabeth A. Mittendorf, Min Yi, Henry M. Kuerer, Gildy V. Babiera, Isabelle Bedrosian, Kelly K. Hunt, Rosa F. Hwang

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

Sentinel lymph node dissection (SLND) is a standard axillary staging technique in breast cancer and intraoperative sentinel lymph node (SLN) assessment is important for decision-making regarding additional treatment and reconstruction. This study was undertaken to investigate clinicopathologic factors impacting the accuracy of intraoperative SLN evaluation. Records of patients with clinically node-negative, invasive breast cancer who underwent SLND with frozen section intraoperative pathologic evaluation from 2004 to 2007 were reviewed. Intraoperative SLN assessment results were compared to final pathology. Patients with positive SLNs that were initially reported as negative during intraoperative assessment were considered false negative (FN) events. Primary tumor histology, grade, receptor status, size, lymphovascular invasion (LVI), multifocality, neoadjuvant chemotherapy or hormonal therapy, number of SLNs retrieved, and SLN metastasis size were evaluated. The study included 681 patients, of whom 262 (38%) received neoadjuvant therapy. There were 183 (27%) patients who had a positive SLN on final pathology, of whom 60 (33%) had FN events. On univariate analysis, lobular histology, favorable histology, absence of LVI and micrometastasis were associated with a higher FN rate. On multivariate analysis, favorable and lobular histology and micrometastasis were independent predictors of FN events whereas LVI and receipt of neoadjuvant therapy were not statistically significant predictors. The accuracy of intraoperative SLN evaluation for breast cancer is affected by primary tumor histology and size of the SLN metastasis. There was no significant association between neoadjuvant therapy and the FN rate by intraoperative assessment. This information may be helpful in counseling patients about their risk for a FN intraoperative SLN assessment and for planning for immediate breast reconstruction in patients undergoing mastectomy.

Original languageEnglish (US)
Pages (from-to)28-34
Number of pages7
JournalBreast Journal
Volume24
Issue number1
DOIs
StatePublished - Jan 1 2018

Keywords

  • breast cancer
  • frozen section
  • metastasis
  • neoadjuvant therapy
  • sentinel lymph node biopsy

ASJC Scopus subject areas

  • Internal Medicine
  • Surgery
  • Oncology

MD Anderson CCSG core facilities

  • Tissue Biospecimen and Pathology Resource
  • Clinical Trials Office

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