Feasibility and accuracy of sentinel lymph node biopsy in clinically node-positive breast cancer after neoadjuvant chemotherapy: a meta-analysis

PLoS One. 2014 Sep 11;9(9):e105316. doi: 10.1371/journal.pone.0105316. eCollection 2014.

Abstract

Sentinel lymph node biopsy (SLNB) has replaced conventional axillary lymph node dissection (ALND) in axillary node-negative breast cancer patients. However, the use of SLNB remains controversial in patients after neoadjuvant chemotherapy (NAC). The aim of this review is to evaluate the feasibility and accuracy of SLNB after NAC in clinically node-positive patients. Systematic searches were performed in the PubMed, Embase, and Cochrane Library databases from 1993 to December 2013 for studies on node-positive breast cancer patients who underwent SLNB after NAC followed by ALND. Of 436 identified studies, 15 were included in this review, with a total of 2,471 patients. The pooled identification rate (IR) of SLNB was 89% [95% confidence interval (CI) 85-93%], and the false negative rate (FNR) of SLNB was 14% (95% CI 10-17%). The heterogeneity of FNR was analyzed by meta-regression, and the results revealed that immunohistochemistry (IHC) staining may represent an independent factor (P = 0.04). FNR was lower in the IHC combined with hematoxylin and eosin (H&E) staining subgroup than in the H&E staining alone subgroup, with values of 8.7% versus 16.0%, respectively (P = 0.001). Thus, SLNB was feasible after NAC in node-positive breast cancer patients. In addition, the IR of SLNB was respectable, although the FNR of SLNB was poor and requires further improvement. These findings indicate that IHC may improve the accuracy of SLNB.

Publication types

  • Meta-Analysis

MeSH terms

  • Axilla / pathology
  • Breast Neoplasms / diagnosis*
  • Breast Neoplasms / drug therapy
  • Breast Neoplasms / pathology
  • Breast Neoplasms / surgery
  • Female
  • Humans
  • Lymph Node Excision / methods
  • Lymph Nodes / pathology*
  • Neoadjuvant Therapy
  • Sentinel Lymph Node Biopsy*

Grants and funding

The authors have no support or funding to report.