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Breast Cancer

, Volume 21, Issue 5, pp 583–589 | Cite as

GeneSearch™ BLN Assay could replace frozen section and touch imprint cytology for intra-operative assessment of breast sentinel lymph nodes

  • Yong-sheng WangEmail author
  • Yan-hui Liu
  • Tao Ou-yang
  • Xin-hua Yang
  • Jiong Wu
  • Feng-xi Su
  • Xiao Sun
  • Wei-xia Zhong
  • Ning Liao
  • Wen-tao Yang
Original Article

Abstract

Background

Breast cancer sentinel lymph node (SLN) biopsy has become a common procedure. The GeneSearch™ Breast Lymph Node Assay is a real-time reverse-transcriptase polymerase chain reaction assay for detecting nodal metastases larger than 0.2 mm. The trial is a prospective multi-center clinical trial conducted to validate the assay in China.

Methods

Four hundred and seventy-nine consecutive prospective patients were enrolled from six centers. SLNs were sectioned along the short axis into multiple blocks. Odd blocks were tested by the assay intra-operatively, and even blocks were assessed by post-operative histology. Six 4- to 6-μm-thick sections were taken every 150 μm per block. In addition, intra-operative histological assessments were performed on the even blocks of 214 patients by frozen section (FS) and all blocks of 156 patients by touch imprint cytology (TIC).

Results

A total of 1046 SLNs were excised. Overall performance of the assay compared to post-operative histology was accuracy of 91.4 %, sensitivity of 87.5 %, and specificity of 92.9 %. There were no significant differences in assay performance of each center. After a learning curve of about 10 cases, the assay could be performed in a median time of about 35 min. The sensitivity of the assay was similar to the FS (84.9 %, P = 0.885) and was significantly higher than the TIC (70.0 %, P = 0.007) while the specificity of all were comparable.

Conclusion

The GeneSearch™ Breast Lymph Node Assay is an accurate and rapid intra-operative assay for breast SLNs and it can replace FS and TIC for application.

Keywords

Sentinel lymph node biopsy Breast neoplasms Intraoperative period Polymerase chain reaction Histological evaluation 

Notes

Acknowledgments

This study was supported by Johnson & Johnson Medical, China. Medical writing assistance was also provided by Johnson & Johnson medical, China.

Conflict of interest

The authors have no conflict of interest in the study.

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Copyright information

© The Japanese Breast Cancer Society 2013

Authors and Affiliations

  • Yong-sheng Wang
    • 1
    Email author
  • Yan-hui Liu
    • 2
  • Tao Ou-yang
    • 3
  • Xin-hua Yang
    • 4
  • Jiong Wu
    • 5
  • Feng-xi Su
    • 6
  • Xiao Sun
    • 1
  • Wei-xia Zhong
    • 1
  • Ning Liao
    • 2
  • Wen-tao Yang
    • 5
  1. 1.Breast Cancer CenterShandong Cancer HospitalJinanPeople’s Republic of China
  2. 2.Breast CenterGuangdong General HospitalGuangzhouPeople’s Republic of China
  3. 3.Breast CenterBeijing Cancer HospitalBeijingPeople’s Republic of China
  4. 4.Breast CenterSouthwest HospitalChongqingPeople’s Republic of China
  5. 5.Department of Breast SurgeryShanghai Cancer HospitalShanghaiPeople’s Republic of China
  6. 6.Department of Breast SurgeryThe Second Affiliated Hospital of Sun Yat-sen UniversityGuangzhouPeople’s Republic of China

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