Smoking and hormone replacement therapy increases the risk of breast cancer

Smoking hundreds of cigarettes significantly increases the likelihood of developing breast cancer.
At the next stage of research, scientists are going to find out what impact the development of breast cancer has a number of smoked cigarettes.
The team of scientists from the Mayo Clinic (USA) compared the risk factors in 1 225 women, breast cancer patients, and the 6 872 patients whose disease is not diagnosed. The results showed 10% of the subjects smoked at the time of the experiment, 9% separated from the pernicious habit some time ago, while 81% never had it. In women who had smoked in total during the life of a hundred or more cigarettes, the risk of the disease was much higher than the others.
However, the probability of occurrence of malignant tumors in the breast is markedly reduced, as only a woman stop smoking.
It was also found that oral contraceptives for 11 years or more increases the risk of developing breast cancer by 200%. In women who received postmenopausal hormone therapy, the risk increased by 81%. In addition, each year the life of the likelihood of cancer increases by 2%. A hysterectomy (removal of uterus), by contrast, reduces the risk by 35%.
At the next stage of research, scientists are going to find out what impact the development of breast cancer have a smoking in pre-and postmenopausal period, the number of cigarettes smoked and passive smoking.
Recall also that smoking cessation rapidly reduces the risk of heart disease. Within a few weeks after the rejection of cigarettes among women reduced the level of tumor necrosis factor (TNF) and two other related substances. In addition, the content decreases in blood C-reactive protein (CRP), whose presence indicates inflammation in the body, and interleukin-6, also participates in the immune response and inflammatory reaction.