Cancer Breast Anatomy
To better understand breast cancer, it helps to understand the anatomy of the breast.
Breasts are made of fat and milk glands. Small passageways, called ducts, deliver milk from the glands, to the nipple. Lymphatic tissue provides a passageway for cell waste to drain from the breast.
Examples of breast anatomy:
- Aiello EJ, Buist DS, White E, Seger D, Taplin SH. Rate of breast cancer diagnoses among postmenopausal women with self-reported breast symptoms. J Am Board Fam Pract. 2004 Nov-Dec;17(6):408-15. 
- Collaborative Group on Hormonal Factors in Breast Cancer: Breast cancer and hormone replacement therapy: collaborative reanalysis of data from 51 epidemiological studies of 52,705 women with breast cancer and 108,411 women without breast cancer. Collaborative Group on Hormonal Factors in Breast Cancer. Lancet 1997 Oct 11; 350(9084): 1047-59. 
- Giordano SH. A review of the diagnosis and management of male breast cancer. Oncologist. 2005 Aug;10(7):471-9.