[Influence of hormonal factors on triple-negative breast cancer prognosis].

Triples negative breast cancer defined by the absence of expression of the hormone receptors and HER2 protein, are considered as aggressive tumours with bad outcome in comparison to the hormone sensitive tumours. The aim of the study was to evaluate the link between hormone factors and prognostic factors of triple-negative tumours. All patients managed for a triple-negative breast cancer between January, 2009 and December, 2013 were included. For every patient, collected data were the clinical, histological, adjuvant or neoadjuvant treatments, as well as survival data. During the study period, 1682 patients were operated for a breast cancer, among which 1444 presented at least an invasive tumour. One hundred and fifty-five women (10.7%) had a negative triple tumour. The average age of diagnosis was 56.4years, is significantly younger than for patients with other types of tumours, P=0.0001. For women with a triple-negative tumour, the parity was the only hormonal factor identified as an independent factor for axillary lymph node involvement (OR=1.53; 95% CI [1.10-2.25] P=0.02) and previous hormone replacement therapy as an independent factor of locoregional recurrence (OR=0.13 [0.005-0.64] P=0.001). We did not find any hormonal factor predictive of distant metastasis. We did not find any difference in overall survival according to the parity (P=0.72), the Body mass index (P=0.62) or the use of HRT (P=0.49). Hormone factors seem to have a prognostic implication for triple-negative despite the absence of hormone receptors expression.

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