We subscribe to the HONcode principles of the Health On the Net Foundation. That's a good question. Again there is a great deal of truth to that. Well, yes they can spread more quickly because they tend to grow more quickly. And nobody is really sure all the reasons for that, probably it has to do with the effect of estrogens.
Estrogens are in young women prior to menopause, at very, very high levels.
As a result they seem to play a role in how fast cancer grows. So if corners do start developing in a young woman, it's usually stimulated by the estrogens to grow more quickly. And in general, that's not as true after menopause when the estrogen levels drop. Generally as a rule those cancers grow more slowly so it's even more important for that reason that women have regular mammograms on a yearly basis when they are younger, even more important that they have it yearly than when older. So there is a real irony there.