This looks like a fascinating and informative paper. I have not paid to view it but part is available at the lower link.
Definitely worth at least a skim if you have the time.
It emphasises the importance of the Omega 3:6 ratio in breast cancer risk, and in one place suggests a need for a ration of around 1:1 or 1:2 Omega 3 :6.
http://www.ncbi.nlm.nih.gov/pubmed/16145262
http://books.google.co.uk/books?hl=e...HJLU#PPA147,M1