Breast Ultrasound

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A breast ultrasound uses sound waves, not radiation, to create images of breast tissue. It is used mainly to assess a lump, to look more closely at dense breast tissue, and to guide a biopsy needle. In Singapore it usually accompanies a mammogram rather than replacing it.

Not every breast check is a mammogram. A breast ultrasound uses sound waves rather than radiation, and it is particularly good at one thing a mammogram cannot do well: telling a fluid-filled cyst from a solid lump. At Melanie Seah Breast Specialist in Singapore, Dr Melanie Seah, a Consultant Breast Surgeon, advises when ultrasound is useful and reviews the images with you. This page covers what a breast ultrasound is, when it is used alongside a mammogram, what happens on the day, and what it adds for dense breasts.

What is a breast ultrasound?

A breast ultrasound is an imaging test that uses high-frequency sound waves to build pictures of the inside of the breast. A small handheld probe is moved over the skin with gel, and the images appear on a screen as the probe moves. No radiation is involved at any point.

Its particular strength is distinguishing a fluid-filled cyst from a solid lump — a difference a mammogram often cannot resolve on its own. It is also good at examining one specific area closely, rather than surveying the whole breast, which is why it tends to follow a finding rather than lead the search for one.

At Melanie Seah Breast Specialist in Singapore, Dr Melanie Seah, a Consultant Breast Surgeon, advises when a breast ultrasound is needed and reviews the images with you at the same appointment.

When is a breast ultrasound used with or instead of a mammogram?

Almost always with, rarely instead. The two tests find different things, so they are complementary rather than interchangeable. The National Cancer Centre Singapore describes breast ultrasound as an additional test recommended for further evaluation or for higher-risk cases, not as a routine general screening test on its own.

TestWHAT IT INVOLVESWHEN IT IS USED
MammogramLow-dose X-ray images with the breast briefly

compressed between two plates. Uses a small amount

of radiation.

The scheduled screening test. Recommended

yearly from 40 to 49, and every two years from

50.

Breast ultrasoundA handheld probe and gel, using sound waves. No radiation, no compression, no preparation.Assessing a lump, looking into dense tissue, checking younger breasts, and guiding a biopsy needle.
Both togetherThe mammogram is read first, then ultrasound examines anything it could not resolve.Dense breast tissue, or when a mammogram

shows something that needs a closer look.

If the ultrasound finds a solid lump, the next step is usually a breast biopsy, often taken under ultrasound guidance in the same clinic. If you are working out whether a lump needs looking at in the first place, whether a breast lump is cancer covers that, and why breast cancer screening matters explains where the schedule comes from.

breast-ultrasound

What happens during a breast ultrasound?

It is quick, comfortable and needs no preparation at all — no fasting, no injection, nothing to arrange beforehand. Most scans take about fifteen to twenty minutes.

  • You undress to the waist and lie down, usually with one arm raised.
  • A water-based gel is applied so the probe makes proper contact with the skin.
  • The probe is moved over the breast and armpit while images appear on the screen.
  • The gel is wiped off, and you can dress and leave immediately — there is no recovery time.

At Melanie Seah Breast Specialist in Singapore, Dr Melanie Seah reviews the images and explains what they show at the same visit.

after-surgery

Is a breast ultrasound better for dense breasts?

For dense breasts, ultrasound adds detail a mammogram alone can miss — but it adds to the mammogram rather than replacing it.

The problem is one of contrast. Dense breast tissue and a possible abnormality can both appear white on a mammogram, so a change can be hard to pick out against the background. Ultrasound reads that tissue differently and can distinguish a lump within it.

  • Dense tissue makes a mammogram harder to interpret
  • Density is common in younger women and in Asian populations
  • Ultrasound is added when density or a finding warrants it, not by default
  • Dr Melanie Seah advises which combination suits your breast density

Frequently Asked Questions

There is no fixed interval for breast ultrasound, because it is not a standalone screening test in Singapore. Mammography is what runs to a schedule: the Singapore Cancer Society recommends a mammogram once a year for women aged 40 to 49, and once every two years from 50. Ultrasound is added on top of that when there is a reason for it, such as dense breast tissue, a lump that needs assessing, or a finding on a mammogram that needs a closer look. Dr Melanie Seah advises how often it is worth repeating in your case.

No. A breast ultrasound uses high-frequency sound waves to build the image, so there is no ionising radiation involved at any point. That is why it can be repeated as often as clinically useful, and why it is often the first choice for younger women and during pregnancy or breastfeeding. It also needs no special preparation, no fasting and no recovery time, and nothing is injected. At Melanie Seah Breast Specialist in Singapore, Dr Melanie Seah advises when ultrasound alone is appropriate and when it should be combined with a mammogram.

Yes, and this is one of its main strengths. A fluid-filled cyst and a solid lump look clearly different on ultrasound, which a mammogram often cannot separate. Cysts are usually harmless and frequently need nothing more than reassurance. A solid lump is not automatically a concern either, but it does need further assessment, and that usually means a breast biopsy taken under ultrasound guidance. Dr Melanie Seah explains what the scan shows at the Singapore clinic and arranges the next step in the same visit where possible.

In most cases, yes. The two tests find different things rather than the same things twice. Mammography picks up microcalcifications, the tiny mineral deposits that can be an early sign of cancer, and ultrasound generally does not see them. Ultrasound adds detail that a mammogram cannot, particularly within dense tissue and for a specific lump. The National Cancer Centre Singapore describes ultrasound as an additional test rather than a routine replacement for mammography. Dr Melanie Seah advises which combination suits your age, breast density and symptoms.

Need a breast check, or a closer look at a lump?

Book a consultation with Dr Melanie Seah, Consultant Breast Surgeon in Singapore, to discuss whether a breast ultrasound, a mammogram, or both are right for you.



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