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Published in: Journal of Experimental & Clinical Cancer Research 1/2015

Open Access 01-12-2015 | Research

Elaboration of a nomogram to predict non sentinel node status in breast cancer patients with positive sentinel node, intra-operatively assessed with one step nucleic acid amplification method

Authors: F. Di Filippo, D. Giannarelli, C. Bouteille, L. Bernet, R. Cano, G. Cunnick, A. Sapino

Published in: Journal of Experimental & Clinical Cancer Research | Issue 1/2015

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Abstract

Backgrounds

Tumor-positive sentinel node(SLN) biopsy results in a risk of nonsentinel node metastases in case of micro and macro metastases ranging from 20 to 50 %, respectively. Therefore, most patients underwent unnecessary axillary lymph node dissections.
Thus, the development of a mathematical model for predicting patient-specific risk of non sentinel node(NSLN) metastases is strongly warranted.

Methods

The following parameters were recorded:
  • Clinical: hospital, age, medical record number
  • Bio-pathological: tumor (T) size, grading (G), multifocality, histological type, LVI, ER-PR status, HER-2, ki67, molecular classification (luminal A, luminal B, HER2 like, triple negative)
  • Sentinel and nonsentinel lymph node related: number of removed SLNs, number of positive and negative SLNs, copy number of positive sentinel nodes, ratio: number of positive SLNs to number of removed SLNs, number of removed and number of positive nodes after ALND. A total of 2460 patients have been included in the database.
All the patients have been provided by the authors of this paper.

Results

Multivariate logistic regression analysis demonstrated that only the number of a CK19 mRNA copies (p < 0.0001), T size (p < 0.0001) and LVI (p < 0.0001) were associated with NSN metastases.
The discrimination of the model, quantified with the area under the receiver operating characteristics curve, was 0.71 (95 %, C.I. 0.69–0.73), thus confirming a good level of reliability.

Conclusions

The nomogram may be employed by the surgeon as a decision making tool on whether to perform an intraoperative axillary lymph node dissection on breast cancer patients with SLN positive.
The large population employed and the standardized method of measuring the value of CK19 mRNA copies are appropiate prerequisites for a reliable nomogram.
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Metadata
Title
Elaboration of a nomogram to predict non sentinel node status in breast cancer patients with positive sentinel node, intra-operatively assessed with one step nucleic acid amplification method
Authors
F. Di Filippo
D. Giannarelli
C. Bouteille
L. Bernet
R. Cano
G. Cunnick
A. Sapino
Publication date
01-12-2015
Publisher
BioMed Central
Published in
Journal of Experimental & Clinical Cancer Research / Issue 1/2015
Electronic ISSN: 1756-9966
DOI
https://doi.org/10.1186/s13046-015-0246-2

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