Are there certain types of breast cancer that are not hereditary?

Yes: Most breast cancers (85%) are not hereditary and occur in women with no family history of breast cancer. There is a 1 in 9 chance that a woman with no family history of breast cancer will develop breast cancer in her lifetime.

Majority are not: About 85% of breast cancer cases are sporadic and only miority - 10-15% are related to certain hereditary cancer syndrome/genetic mutation. Besides genetic predisposition, other risk factors for breast cancer include lifestyle, dietary - alcohol consumption, smoking, red meat, fat intake, hormonal risk, obesity, exposure to radiation etc.

Most: Most breast cancer is not hereditary. The vast majority of women with breast cancer have no family history of breast cancer.