Breast Ultrasound

What it is for

Ultrasound shows the inside of the breast tissue layer by layer. Its main job is to tell a thin-walled, fluid-filled cyst from a lump filled with tissue. Mammography is better at picking up calcifications. Ultrasound does not serve as a screening tool for clusters of calcifications. The two are not rivals.

The probe is placed on the skin with gel. The breast is not compressed. For most women the exam is painless; there may be pressure over a tender spot. It is short if a single lump is checked and takes longer if both breasts are scanned. There is no need to fast, have a full bladder or pick a day of the cycle. Before a period, tense breasts can make the exam harder; for an urgent lump, no one waits for a particular day.

When it is requested

If there is a new lump at forty or older, ultrasound alone does not close the file. Mammography is discussed at the same visit. Under thirty, mammography is not the first step; ultrasound and examination come first. Between thirty and thirty-nine, both may be needed.

Cyst, solid lump, discharge

A simple cyst is filled with fluid, has a thin wall and is empty inside. It can hurt and can swell with the period. Most are monitored, not drained. If there are septa, debris or a thick wall inside, it is not counted as simple. A follow-up interval is written down.

A solid lump is not always cancer. Fibroadenoma is common in young women and can be smooth-edged and mobile. Even if the image supports a fibroadenoma, age, growth and family history change the biopsy decision. A lump with irregular margins, its long axis perpendicular to the skin and casting a shadow, is not postponed with “let’s watch it”.

Milky discharge from both breasts that appears when squeezed is usually linked to hormones and medication. Spontaneous, bloody discharge from one breast is investigated for an intraductal papilloma or, more rarely, a serious lesion. Ultrasound can show the duct; if it does not, mammography and a surgical sample are discussed.

Nipple inversion, orange-peel skin and new retraction on one side are clinical alarms before any imaging. They are checked the same day.

Dense breasts

Density is not the name of a disease. It means that glandular tissue looks more prominent than fatty tissue on mammography. Four categories are reported: fatty, scattered fibroglandular, heterogeneously dense, extremely dense. In heterogeneously and extremely dense breasts, mammography can mask some cancers. The ACR discusses supplemental screening based on risk and density. Ultrasound is one of these additions. Magnetic resonance imaging comes first in high risk. Ultrasound does not bring cancer risk to zero in every dense breast; it also brings false positives and unnecessary biopsies. The decision is not stamped “ultrasound for everyone”.

Screening and symptoms are not the same door

A woman with symptoms is not screened; she is examined. A palpable lump is not put on hold because she has not reached screening age. In women without symptoms, mammography is the backbone of population screening. Mammography has been shown to reduce deaths. Ultrasound alone does not have the same evidence as a screening test. If there is breast cancer at a young age in the family, a known gene change or a history of radiotherapy to the chest wall, the age to start mammography and magnetic resonance imaging are discussed separately. This page does not replace that risk assessment.

How the result is reported

The finding is usually summarised within the BI-RADS framework. This is not a cancer stage. It tells you the next step after the imaging.

Category 3 means waiting, not forgetting. If the check-up date is missed, the category loses its meaning. The biopsy decision reads the imaging category and the examination together.

What it does not show

Ultrasound does not replace mammography. It does not serve as a screening tool for clusters of microcalcifications. It does not always see the whole armpit or what lies behind the chest wall of the breast. It does not give a hormone result. If a lump that looked benign grows years later, the old report is no guarantee. Male breast tissue is not the subject of this page.

Our approach at SoftCare

Breast complaints also come in through the gynecology door. Examination comes first: the palpable spot, whether the discharge comes from a single duct, the skin. Ultrasound tells a cyst from a solid lump. After forty and with a suspicious image, mammography is requested in the same file. At the clinic, a biopsy question is not closed with the sentence “the ultrasound is clear”; if there is an indication, you are referred. Dense breasts are not made a reason to cancel screening mammography. A swelling in pregnancy is not put on hold; the first imaging is ultrasound.

Listing these sources does not mean SoftCare wrote those texts. If findings require it, biopsy and mammography are completed at a partner imaging unit.

Medically reviewed by Op. Dr. Şükrü Sanus, Obstetrician & Gynecologist · Last medical review: 2 October 2026