شمارش 3CD، 4CD و 8CD و نسبت 8CD/4CD در مخاط سینوس و میزان IgE سرم افراد بالغ مبتلا به سینوزیت مزمن تحت عمل جراحی

Breast cancer is the most frequent cancer among women. Approximately one third of all cancers in women is breast cancer which has a high mortality rate and is second only to lung cancer in cancer related deaths in women. Unfortunately, during the past 50 years, the prevalence of breast cancer has been raised probably due to life style changes. Recently, the prevalence of this cancer in different areas of world ranges between 8 to 23 in every one hundred women. The prevalence in Iran has not been established yet, but some unpublished data from three academic centers related to Mashhad University have indicated that the prevalence of breast cancer raised in women during reproductive age is different and has not been clearly identified. In addition, the risk factors in different countries are not the same and our country has its specific risk factors that should be identified. The main aim of this research was the assessment of certain breast cancer risk factors during reproductive age. This research was a descriptive-analytic and multi-variant study with two groups of case and control. The total number of participants in this research was 350 persons 170 of them were in case and 180 in control group. Interview forms were used for the assessment of the problem. Results indicated that variables such as age, race(heredity), geographic location of residence, occupation and its duration, history of marriage, the age at first pregnancy, mensturac regularity, nulliparity, history of preterm labor, history of infertility, medical and surgical history, cigarette smoke exposure and x-ray exposure are some significant risk factors associated with breast cancer among premenopausal women living in Mashhad.