Home» Site-specific Modules» Breast Cancer» Anatomy» Quadrants of the Breast. Section Menu. Cancer Registration & Surveillance Modules. Site-specific Modules. Breast Cancer. Introduction. Types of Breast Cancer; Risk Factors; Signs & Symptoms; Five-Year Survival Rates; Review; Anatomy. Commonly developing from the mammary glands or ducts, such malignant lumps generally (about 50 percent) appear in the upper, outer quadrant of the breast, extending into the armpit, where tissue is thicker than elsewhere.
Apr 17, · Many studies have shown that the upper outer quadrant of the breast is the most frequent site for occurrence of breast cancer [ 22 – 24 ]. A study [ 23] consisting of consecutive breast core biopsies noted 62% of malignant lesions (95% confidence interval %) arose from the UO xxvoyeur.xyz by: 8. Mar 20, · March 20, -- The difference in the size of a woman's right and left breast may help predict her risk for developing breast cancer. Few women have perfectly symmetrical breasts, but the.
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. There is no association, according to findings of a study published in BMC Cancer. The relatively high proportion of carcinomas arising in the upper outer quadrant of the breasts is argued to support the hypothesis that underarm cosmetics cause breast cancer.