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پاورپوینت در مورد Breast Cancer

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پاورپوینت در مورد Breast Cancer

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نوع فایل :  powerpoint (..ppt) ( قابل ويرايش و آماده پرينت )
تعداد اسلاید : 12 اسلاید

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Breast Cancer
Breast cancer accounts for approximately one third of all cancers in women and is second (after lung ) cancer as the leading cause of cancer deaths among women.
Predisposing Factors
Fewer than 1% of breast cancers occur in women younger than 25 years of age. After age30 , however, there is a sharp increase in the incidence of breast cancer. Except for a short plateau between the ages of 45 and 50 years, the incidence increases steadily with age .
Family History
Of women who develop breast cancer, 20% to 30% have a family history of the disease .
Although any family history of breast cancer increases the overall relative risk , this risk is not significantly increased if the disease was diagnosed postmenopausally in a first degree or more distant relative.
If a woman's mother or sister had unilateral breast cancer premenopausally , her lifetime risk of developing the disease approaches 30 %.
whereas a woman whose mother or sister had bilateral breast cancers premenopausally has at least a 40% to 50% lifetime risk .
The increased incidence in these women is probably due to inherited oncogenes .

 

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