A woman's breast is made up of milk glands and milk ducts, surrounded by fatty tissue and connective supports. Uncontrolled growth of cells in any of these breast tissues can cause breast cancer.
Breast cancer is the most common cancer among women.. Chances of developing breast cancer rise dramatically as women age. At age 30, the chances of getting the disease are 1 in 209; at age 50, the risk of developing breast cancer goes up to 1 in 42; and over the age of 70, it becomes 1 in 25.
Breast cancer is rare in men, accounting for less than 1% of all cases. Breast cancer is the second most common cause of death from cancer in women.