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How old should a woman be when she has her first mammogram? How often should she have a mammogram?
Not all experts agree on the answer to this question. If a woman is at average risk:
Close monitoring, though not prevention, aims to find a cancer as soon as it becomes detectable. This monitoring with mammography and MRI should be done at a center for high-risk women.
The breast contains ducts, glands, fibrous connective tissue, and fatty tissue. Breasts that are dense or very dense have a lot of fibrous, connective tissue and less fatty tissue. Breasts that are not dense contain almost all fatty tissue and very little fibrous tissue. Virtually all women start out with very dense breast tissue. Over time this changes, and, as a woman ages, her breasts typically become more fatty. However, there are some women whose breasts remain fibrous and dense, even after menopause.