mammary cancer promotion was inhibited by two methods : estriol ( e3 ) 638 micrograms/month ( 2.2 microns/mo ) subcutaneously for natural life span begun 2 weeks after exposure reduced cancer incidence from 76 % in controls to 48 % after 331 to 449 mean days observation until neoplasia was palpable ( p less than 0.02 by chi-square analysis ) .
C0006826
cancer
C0027651
neoplasia