I'll just start by saying that they did put it in the guidelines. There's been a lot of research done in the States to show that women with dense breasts have at least a four to six times higher risk of getting breast cancer.
If you add MRI to supplemental screening, I think you pick up at least 80% more cancers, where in a mammogram it would have been normal. If you add ultrasound, you'd pick up at least 50% more. There is for sure some evidence to show that supplemental screening would help pick up more cancers and that should have been factored into guidelines.
I'll stop there.