Where in the breast is cancer most common? Several studies have found that the upper outer quadrant of the breast is the most frequent site for breast cancer occurrence. That would be the part of your breast nearest the armpit.
What area of the breast is most vulnerable to breast cancer? Multiple studies have shown that women with mammographically dense breasts are at a higher risk of developing breast cancer and that the upper outer quadrant of the breast is the most frequent site where breast cancer is located.
Which breast does cancer start in left or right? Breast cancer occurs more frequently in the left breast than the right. The left breast is 5%-10% more likely to develop cancer than the right breast.
What are the 4 types of breast cancer? Types of breast cancer include ductal carcinoma in situ, invasive ductal carcinoma, inflammatory breast cancer, and metastatic breast cancer.