Density question
I have heard many sources cite that dense breast tissue raises cancer risk, including the online calculators. I am 64 with density C and have been having mammograms and ultrasounds since mid thirties due to complex cysts. So even 30 years ago my reports noted this density. I understand it is a law now here in the US that we be informed. What I can't figure out is why density in itself is a risk factor. l understand the mammogram is harder to read angle, is that the sole reason?