A member asked:

Ultrasound showed benign cysts on breast.. will they go away? any idea why they didn't show up on mammogram only ultrasound?

4 doctors weighed in across 3 answers

May eventually go : Cysts are normal components of breast tissue especially in pre-menopausal female. They tend to involute after menopause. I am not surprised that they only show on one modality. Some breast cancers (for instance, lobular cancer) don't show up on either test. Not to worry about this. If you are worried about breast tissue and your insurance can pay or you can afford it - an MRI may be helpful.

Answered 6/10/2014

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Dr. Tina Stein answered

Specializes in Radiology

They may go away.: Benign cysts may enlarge or resolve or stay the same for years. Some say that eliminating caffeine from your diet may help. If the cysts are painful, needle aspiration may be curative, but otherwise nothing needs to be done.Cysts may be invisible on a mammogram when the breast is dense (glandular) and the cysts are hidden by adjacent normal tissue or if they are small. They do not become cancer.

Answered 6/22/2017

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Dr. Michael Gabor answered

Specializes in Diagnostic Radiology

Mammograms: are unable to diagnose cysts. Cysts are of the same X-ray density as solid soft tissue on mammo. A cyst will look like a round mass on mammo, but ultrasound can usually easily distinguish cyst from solid. Cysts can come and go, and get bigger or smaller. No way to predict what they will do. Fortunately, they are benign.

Answered 7/17/2014

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