Breast cancer can lie hidden from mammography in women with dense breast tissue, and thus the role of ultrasound is implemented to evaluate the texture and anatomical structures within the breast. Women most likely to have dense breasts are younger, premenopausal women and postmenopausal women who are taking hormone replacement therapy.
Breast ultrasound is used as a complementary examination to mammography in the following situations:
* Evaluation of dense breast tissue.
* Evaluation of a mass demonstrated on mammography.
* Guidance of biopsy needle or needle localization (see cyst aspiration image)
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