Can Passive Smoking cause Breast Cancer?

Many studies have shown inconclusive and conflicting results regarding the association of smoking (active or passive) with breast cancer. But newer studies have challenged this conclusion and suggested a connection between smoking and an increased risk of breast cancer

Studies have yet to conclusively prove a link between tobacco smoke and breast cancer, but evidence is piling up.

Is passive smoking related to breast cancer risk?

Most, but not all, studies that compared women who were passively exposed to tobacco smoke to women with no exposure to tobacco smoke reported an association of passive smoking with an increased risk of breast cancer.

A survey of studies by the Public Health Agency of Ottawa, Ontario Canada, even showed that secondhand smoke increases risk of developing premenopausal breast cancer by 14 to 119%, depending on the amount of exposure.

Epidemiological and toxicological studies show women’s breast tissue is very sensitive to exposure to carcinogens in its growth stage and prior to first pregnancy. This shows that passive smoking can increase the risk of breast cancer.

What the studies say about passive smoking and breast cancer?

Long-term exposure to passive smoking is associated with an overall increased breast cancer risk of 27 percent in life-long nonsmokers. More importantly, the studies that collected the most complete measures of passive smoking related to breast cancer observed breast cancer risk by 90%.

Though the association of passive smoking and breast cancer is controversial but many recent studies say it as a significant and independent risk factor for breast cancer.

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