Radiation and timing Effects on development of her2 bc
 

http://clincancerres.aacrjournals.or...t/full/13/1/46

Yes, her2 bc happens often in young women with bc, and it appears that early-life carcinogen exposure is of significance to the development of her2 bc, particuarly as it relates to radiation exposure, not to say that it is the only carcinogen player in the her2 bc game.