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Common risk factors for multiple primaries in women with breast cancer (adapted from Wood et al 9)
| Second cancer | Risk factors | ||
| Second breast cancer | Genetic (BRCA1, BRCA2) | Endocrine/hormonal factors | Obesity |
| Ovarian | Genetic (BRCA1, BRCA2) | Endocrine/hormonal factors | |
| Uterine/endometrial | Endocrine/hormonal factors | Obesity | |
| Colorectal cancer | Endocrine/hormonal factors | Obesity | |
| Renal cell carcinoma | Obesity | ||
| Pancreatic | Obesity | ||
| Thyroid | Obesity | ||
| Gallbladder | Obesity | ||
