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Concordance of tumour characteristics and survival clustering among pairs of first-degree relatives with breast cancer.

Authors :
Rapiti E
Tille JC
Fournier E
Saiji E
Weintraub D
Bouzourene H
Viassolo V
Bouchardy C
Chappuis PO
Benhamou S
Source :
Swiss medical weekly [Swiss Med Wkly] 2020 Sep 14; Vol. 150, pp. w20327. Date of Electronic Publication: 2020 Sep 14 (Print Publication: 2020).
Publication Year :
2020

Abstract

Background: Family history is a known risk factor for breast cancer, but its prognostic value and the prognostic value of tumour characteristics in relation to family history has not been clearly established. In addition, studies of intra-familial tumour characteristics and prognosis in population-based settings are very rare. Two previous studies have suggested that breast cancer prognosis clusters within families. However, both studies lack information on HER2 expression status, which is a strong prognostic factor and could contribute to the observed results.<br />Methods: We conducted a population-based study on 145 mother-daughter and sister-sister affected pairs using data extracted from the Geneva Cancer Registry. Histopathological characteristics were determined in archived tumour blocks by immunochemistry techniques. Breast cancer survival among family members was studied according to patient and tumour characteristics.<br />Results: No significant intra-familial agreement of pathological characteristic features was observed. We found that relatives of breast cancer patients experienced a much higher risk of breast cancer death compared to the general population. However, we did not find significant concordance in good and poor breast cancer-specific survival between pairs. The small number of family pairs and deaths from breast cancer may partly explain our results.<br />Conclusions: Large-scale studies with accurate data on strong prognosticators are still needed to confirm the possibility of familial inheritance of breast cancer prognosis. &nbsp.

Details

Language :
English
ISSN :
1424-3997
Volume :
150
Database :
MEDLINE
Journal :
Swiss medical weekly
Publication Type :
Academic Journal
Accession number :
33035353
Full Text :
https://doi.org/10.4414/smw.2020.20327