I wish your friend's wife luck, but there's very little they can do once it has metastasized extensively (final stage.)
Here's the emedicine article on breast cancer:
http://www.emedicine.com/plastic/topic521.htm
The National Cancer Insitute's info on alternative therapies:
http://www.cancer.gov/templates/list...5-c4fb3cbbb07e
And their page on benzaldehyde:
http://cis.nci.nih.gov/fact/9_3.htm