Mammographic density and breast cancer in women from high risk families

Mammographic density (MD) is one of the strongest determinants of sporadic breast cancer (BC). In this study, we compared MD in BRCA1/2 mutation carriers and non-carriers from BRCA1/2 mutation-positive families and investigated the association between MD and BC among BRCA1/2 mutation carriers per ty...

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Veröffentlicht in:Breast cancer research : BCR 2015-07, Vol.17 (1), p.93-93, Article 93
Hauptverfasser: Ramón Y Cajal, Teresa, Chirivella, Isabel, Miranda, Josefa, Teule, Alexandre, Izquierdo, Ángel, Balmaña, Judith, Sánchez-Heras, Ana Beatriz, Llort, Gemma, Fisas, David, Lope, Virginia, Hernández-Agudo, Elena, Juan-Fita, María José, Tena, Isabel, Robles, Luis, Guillén-Ponce, Carmen, Pérez-Segura, Pedro, Luque-Molina, Mari Sol, Hernando-Polo, Susana, Salinas, Mónica, Brunet, Joan, Salas-Trejo, María Dolores, Barnadas, Agustí, Pollán, Marina
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Sprache:eng
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Zusammenfassung:Mammographic density (MD) is one of the strongest determinants of sporadic breast cancer (BC). In this study, we compared MD in BRCA1/2 mutation carriers and non-carriers from BRCA1/2 mutation-positive families and investigated the association between MD and BC among BRCA1/2 mutation carriers per type of mutation and tumor subtype. The study was carried out in 1039 female members of BRCA1 and BRCA2 mutation-positive families followed at 16 Spanish Genetic Counseling Units. Participants' density was scored retrospectively from available mammograms by a single blinded radiologist using a 5-category scale (75 %). In BC cases, we selected mammograms taken prior to diagnosis or from the contralateral breast, whereas, in non-cases, the last screening mammogram was evaluated. MD distribution in carriers and non-carriers was compared using ordinal logistic models, and the association between MD and BC in BRCA1/2 mutation carriers was studied using logistic regression. Huber-White robust estimators of variance were used to take into account correlations between family members. A similar multinomial model was used to explore this association by BC subtype. We identified and scored mammograms from 341 BRCA1, 350 BRCA2 mutation carriers and 229 non-carriers. Compared to non-carriers, MD was significantly lower among BRCA2 mutation carriers (odds ratio (OR) =0.71; P-value=0.04), but not among BRCA1 carriers (OR=0.84; P-value=0.33). MD was associated with subsequent development BC (OR per category of MD=1.45; 95 % confidence interval=1.18-1.78, P-value
ISSN:1465-542X
1465-5411
1465-542X
DOI:10.1186/s13058-015-0604-1