I had a mammogram and ultrasound recently the outcome was negative but dense (cyst) breast. should i be concern?

Possibly. : Dense breasts could "hide" disease. U/s will usually find lesions hidden in the dense tissue noted on the mammo. However if you have risk factors such as a positive family history, speak to your doctor about obtaining a breast MRI which is more sensitive than u/s for dense breast tissue, and should be considered in a female with neg mammo an u/s, with dense breast tissue, with known risk factors.

Probably not: It is not abnormal to have dense breasts and cysts in women in their 40's. As long as the cyts are 'simple' and not 'complex' as seen on ultrasound, no intervention is needed. Dense breasts seen on a mammogram are more difficult for the radiologist to interpret because small cancers can hide in the dense breast tissue. That is why whole breast ultrasound and MRI are helpful in these women.

Dense breasts: Dense breasts make finding cancer on a mammogram more difficult. This is why ultrasound may be done in addition to mammogram in the setting of dense breasts. You mention cyst which is different then a dense breast. Cysts are small collections of fluid and can be seen in both dense and non-dense breasts.

See Breast surgeon: Fibrocystic or dense breasts are common in women. If strong family history or positive brca gene then close monitoring and follow-up examinations will be required. Otherwise continue with yearly mammogram/ultrasound. See your breast surgeon if any concerns.

No.: Check the BIRAD diagnostic code at the bottom of the report. If it is 2, it means that the cyst is a simple benign cyst(this is what it sounds like). If it is 1, then that is normal also.