The Epidemiology and Etiology of Breast Cancer

Abstract

Breast cancer is hormonally mediated and estrogens are the prime agents in tumor expression; estrogen action may be unopposed by progesterone at certain critical periods in a woman's life. This was the main conclusion of the first of four meetings at Leeds Castle, England, June 19 to 22, 1980, which together form the Multi-disciplinary Project on Breast Cancer of the International Union against Cancer.The purpose of the project is to determine strategies that should be adopted for the study and control of breast cancer within the contexts of prevention, detection, and management. An important objective of the meetings is . . .