Causes of Breast Cancer
After puberty, a woman's breast consists of fat, connective tissue, and thousands of lobules, tiny glands that produce milk for breast-feeding. Tiny tubes, or ducts, carry the milk toward the nipple. In cancer, the body's cells multiply uncontrollably. It is the excessive cell growth that causes cancer. Breast cancer can be: Ductal carcinoma: This begins in the milk duct and is the most common type. Lobular carcinoma: This starts in the lobules. Invasive breast cancer is when the cancer cells break out from inside the lobules or ducts and invade nearby tissue, increasing the chance of spreading to other parts of the body. Non-invasive breast cancer is when the cancer is still inside its place of origin and has not broken out. However, these cells can eventually develop into invasive breast cancer.
Smoking, Alcohol consumption and wrong dietary patterns contribute a lot to the risk of developing breast cancer. For long-term smokers, the risk increases
by 35% to 50%.
Genetics is believed to be the primary cause of 5-10% of all cases. In those with zero, one or two affected relatives, the risk of developing breast cancer before the age of 80 is 7.8%, 13.3% or 21.1%.
Evidence from studies and research suggests that people exposed to radiation are at risk of developing breast cancer. Workers around a radiation plant or nuclear plant, might be at a higher risk.
It has been assumed by few of the researchers that, greater the level of oestrogen (female hormone) in a women’s body, the more susceptible she is to breast cancer. Oestrogen is the female hormone that can help the cells to divide hence, the more the cells divide, the more is the possibility of it becoming cancerous.
Breast conditions like a typical ductal hyperplasia and lobular carcinoma in situ, found in benign breast issues such as fibrocystic breast changes, are related to an increased breast cancer risk. Diabetes might also increase the risk of breast cancer.