| Autor: |
Brinton, Louise A. Cook, Michael B. McCormack, Valerie and Johnson, Kenneth C. Olsson, Hakan Casagrande, John T. Cooke, Rosie Falk, Roni T. Gapstur, Susan M. Gaudet, Mia M. and Gaziano, J. Michael Gkiokas, Georgios Guenel, Pascal and Henderson, Brian E. Hollenbeck, Albert Hsing, Ann W. and Kolonel, Laurence N. Isaacs, Claudine Lubin, Jay H. Michels, Karin B. Negri, Eva Parisi, Dominick Petridou, Eleni Th. and Pike, Malcolm C. Riboli, Elio Sesso, Howard D. Snyder, Kirk and Swerdlow, Anthony J. Trichopoulos, Dimitrios Ursin, Giske and van den Brandt, Piet A. Van Den Eeden, Stephen K. and Weiderpass, Elisabete Willett, Walter C. Ewertz, Marianne and Thomas, David B. European Rare Canc Study Grp |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Popis: |
The etiology of male breast cancer is poorly understood, partly because of its relative rarity. Although genetic factors are involved, less is known regarding the role of anthropometric and hormonally related risk factors. In the Male Breast Cancer Pooling Project, a consortium of 11 casecontrol and 10 cohort investigations involving 2405 case patients (n 1190 from casecontrol and n 1215 from cohort studies) and 52013 control subjects, individual participant data were harmonized and pooled. Unconditional logistic regression generated study designspecific (casecontrol/cohort) odds ratios (ORs) and 95% confidence intervals (CIs), with exposure estimates combined using fixed effects meta-analysis. All statistical tests were two-sided. Risk was statistically significantly associated with weight (highest/lowest tertile: OR 1.36; 95% CI 1.18 to 1.57), height (OR 1.18; 95% CI 1.01 to 1.38), and body mass index (BMI; OR 1.30; 95% CI 1.12 to 1.51), with evidence that recent rather than distant BMI was the strongest predictor. Klinefelter syndrome (OR 24.7; 95% CI 8.94 to 68.4) and gynecomastia (OR 9.78; 95% CI 7.52 to 12.7) were also statistically significantly associated with risk, relations that were independent of BMI. Diabetes also emerged as an independent risk factor (OR 1.19; 95% CI 1.04 to 1.37). There were also suggestive relations with cryptorchidism (OR 2.18; 95% CI 0.96 to 4.94) and orchitis (OR 1.43; 95% CI 1.02 to 1.99). Although age at onset of puberty and histories of infertility were unrelated to risk, never having had children was statistically significantly related (OR 1.29; 95% CI 1.01 to 1.66). Among individuals diagnosed at older ages, a history of fractures was statistically significantly related (OR 1.41; 95% CI 1.07 to 1.86). Consistent findings across casecontrol and cohort investigations, complemented by pooled analyses, indicated important roles for anthropometric and hormonal risk factors in the etiology of male breast cancer. Further investigation should focus on potential roles of endogenous hormones. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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