Pathology of breast and ovarian cancers among BRCA1 and BRCA2 mutation carriers: results from the Consortium of Investigators of Modifiers of BRCA1/2 (CIMBA)

Mavaddat, N. et al. (2012) Pathology of breast and ovarian cancers among BRCA1 and BRCA2 mutation carriers: results from the Consortium of Investigators of Modifiers of BRCA1/2 (CIMBA). Cancer Epidemiology, Biomarkers and Prevention, 21(1), pp. 134-147. (doi:10.1158/1055-9965.EPI-11-0775)

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Background: Previously, small studies have found that BRCA1 and BRCA2 breast tumors differ in their pathology. Analysis of larger datasets of mutation carriers should allow further tumor characterization. <p/>Methods: We used data from 4,325 BRCA1 and 2,568 BRCA2 mutation carriers to analyze the pathology of invasive breast, ovarian, and contralateral breast cancers. <p/>Results: There was strong evidence that the proportion of estrogen receptor (ER)-negative breast tumors decreased with age at diagnosis among BRCA1 (P-trend = 1.2 × 10−5), but increased with age at diagnosis among BRCA2, carriers (P-trend = 6.8 × 10−6). The proportion of triple-negative tumors decreased with age at diagnosis in BRCA1 carriers but increased with age at diagnosis of BRCA2 carriers. In both BRCA1 and BRCA2 carriers, ER-negative tumors were of higher histologic grade than ER-positive tumors (grade 3 vs. grade 1; P = 1.2 × 10−13 for BRCA1 and P = 0.001 for BRCA2). ER and progesterone receptor (PR) expression were independently associated with mutation carrier status [ER-positive odds ratio (OR) for BRCA2 = 9.4, 95% CI: 7.0–12.6 and PR-positive OR = 1.7, 95% CI: 1.3–2.3, under joint analysis]. Lobular tumors were more likely to be BRCA2-related (OR for BRCA2 = 3.3, 95% CI: 2.4–4.4; P = 4.4 × 10−14), and medullary tumors BRCA1-related (OR for BRCA2 = 0.25, 95% CI: 0.18–0.35; P = 2.3 × 10−15). ER-status of the first breast cancer was predictive of ER-status of asynchronous contralateral breast cancer (P = 0.0004 for BRCA1; P = 0.002 for BRCA2). There were no significant differences in ovarian cancer morphology between BRCA1 and BRCA2 carriers (serous: 67%; mucinous: 1%; endometrioid: 12%; clear-cell: 2%). <p/>Conclusions/Impact: Pathologic characteristics of BRCA1 and BRCA2 tumors may be useful for improving risk-prediction algorithms and informing clinical strategies for screening and prophylaxis.

Item Type:Articles
Additional Information:Edward Tobias as member of EMBRACE
Glasgow Author(s) Enlighten ID:Tobias, Professor Edward
Authors: Mavaddat, N., Barrowdale, D., Andrulis, I.L., Domchek, S.M., Eccles, D., Nevanlinna, H., Ramus, S.J., Spurdle, A., Robson, M., Sherman, M., Mulligan, A.M., Couch, F.J., Engel, C., McGuffog, L., Healey, S., Sinilnikova, O.M., Southey, M.C., Terry, M.B., Goldgar, D., O'Malley, F., John, E.M., Janavicius, R., Tihomirova, L., Hansen, T.V.O., Nielsen, F.C., Osorio, A., Stavropoulou, A., Benítez, J., Manoukian, S., Peissel, B., Barile, M., Volorio, S., Pasini, B., Dolcetti, R., Putignano, A.L., Ottini, L., Radice, P., Hamann, U., Rashid, M.U., Hogervorst, F.B., Kriege, M., van der Luijt, R.B., Peock, S., Frost, D., Evans, D.G., Brewer, C., Walker, L., Rogers, M.T., Side, L.E., Houghton, C., Weaver, J., Godwin, A.K., Schmutzler, R.K., Wappenschmidt, B., Meindl, A., Kast, K., Arnold, N., Niederacher, D., Sutter, C., Deissler, H., Gadzicki, D., Preisler-Adams, S., Varon-Mateeva, R., Schönbuchner, I., Gevensleben, H., Stoppa-Lyonnet, D., Belotti, M., Barjhoux, L., Isaacs, C., Peshkin, B.N., Caldes, T., de la Hoya, M., Cañadas, C., Heikkinen, T., Heikkilä, P., Aittomäki, K., Blanco, I., Lazaro, C., Brunet, J., Agnarsson, B.A., Arason, A., Barkardottir, R.B., Dumont, M., Simard, J., Montagna, M., Agata, S., D'Andrea, E., Yan, M., Fox, S., Rebbeck, T.R., Rubinstein, W., Tung, N., Garber, J.E., Wang, X., Fredericksen, Z., Pankratz, V.S., Lindor, N.M., Szabo, C., Offit, K., Sakr, R., Gaudet, M.M., Singer, C.F., Tea, M.-K., Rappaport, C., Mai, P.L., Greene, M.H., Sokolenko, A., Imyanitov, E., Toland, A.E., Senter, L., Sweet, K., Thomassen, M., Gerdes, A.-M., Kruse, T., Caligo, M., Aretini, P., Rantala, J., von Wachenfeld, A., Henriksson, K., Steele, L., Neuhausen, S.L., Nussbaum, R., Beattie, M., Odunsi, K., Sucheston, L., Gayther, S.A., Nathanson, K., Gross, J., Walsh, C., Karlan, B., Chenevix-Trench, G., Easton, D.F., Antoniou, A.C., and Tobias, E.S.
Subjects:Q Science > QH Natural history > QH426 Genetics
College/School:College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing > Clinical Specialities
Journal Name:Cancer Epidemiology, Biomarkers and Prevention
Publisher:American Association for Cancer Research
ISSN (Online):1538-7755
Published Online:05 December 2011

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