Epidemiological Perspective of Breast Cancer Risk Factors in Qazvin, Iran

Breast cancer is uncontrolled growth of abnormal cells that occur in different areas of the breast. This might happen in different kinds of tissue such as ducts that convey milk, milk producing tissue or nonglandular tissue. The incidence of various types of cancer varies among different populations and is in connection with factors such as occupation, society, culture, race (possibly hereditary), geography and nutrition (1). Research in the field of breast disease is very broad because the disease mostly affects women who are the main hub of the family and improvement in quality of their life is equal to improvement of the quality of the community which they involved (2). Each year there are quite a number of breast cancer patients who die (3). Breast cancer is also seen between men but it is more common among women (4). According to study of glocoban which was conducted by the International Agency for Research on Cancer affiliated with the World Health Organization in 2010, about 1,050,300 new cases of breast cancer has occurred that about 84/44% of them occurred in developing countries