What Causes Breast Cancer?
Breast cancer is a cancer which forms in breast cells. There are several types of breast cancer, but tumor which occurs in milk ducts is the most common cancer type. Besides skin cancer, breast cancer is another most common cancer type diagnosed in women in United States of America. This may occur in both women and men. Earlier, many deaths were reported but now due to public awareness the survival rate has increased. Here are a few causes of breast cancer.
Causes of Breast Cancer:
It is not evident what triggers breast cancer. Medical practitioners say that breast cancer develops when the breast cells start growing abnormally. Compared to healthy cells, these cells divide more rapidly. These cells may spread through the breast to lymph nodes or other body parts.
Often, breast cancer begins within the cells in milk-producing ducts. In medical terms, it is termed as invasive ductal carcinoma. This cancer type may even develop in milk glands called lobules in breast.
Researchers revealed that there are some factors which increase the risk of breast cancer. But, they are not clear why some develop breast cancer even if they do not have any risk factors, yet some people have risk factors but do not develop this. Breast cancer might develop due to a complex interaction between the environment and genetic makeup.
Inherited breast cancer:
According to statistics, only 5 – 10 % of breast cancers are associated with gene mutations which are passed through the generations. Numerous inherited defective genes which increase the risk of breast cancer have been detected by the researchers. BRCA1 (breast cancer gene 1) and BRCA2 (breast cancer gene 2) increase the risk of ovarian cancer and breast cancer.
Symptoms of Breast Cancer:Following are some signs and symptoms of breast cancer:
- Bloody discharge from nipple
- Inverted nipple
- Thickening or breast lump which feels different from the adjacent tissues
- Change in shape or size of the breast
- Flaking, peeling or scaling of breast skin or nipple
- Changes to skin over breast like dimpling
- Pitting or redness of skin over the breast, like the orange’s skin