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Radiology • Breast Imaging

Breast Ultrasound

Also called: USG Breast • Breast Sonography • Targeted Breast Ultrasound

Breast ultrasound uses sound waves to examine breast tissue and, when needed, the lymph nodes in the armpit. It is commonly used to assess a lump, localised symptom or an area found on mammography or MRI.

It can show whether a finding is fluid-filled, solid or mixed and can guide a needle procedure. Ultrasound does not use radiation, but it does not replace mammography or clinical examination when those are indicated.

Book a Scan How to prepare ↓

Do not rely on self-referral for a scan alone

New Breast Changes Need Proper Clinical Assessment

Arrange prompt medical or breast-clinic assessment if you notice:

  • A new lump or thickening in the breast, chest wall or armpit.
  • New nipple inversion or spontaneous clear or bloodstained nipple discharge.
  • Skin dimpling, puckering, persistent redness, ulceration or an orange-peel appearance.
  • A persistent change in breast size, shape or nipple position.
  • A new nipple or areolar rash that does not settle.
  • A persistent focal symptom even if a previous scan was reported as normal.

Seek same-day advice for a rapidly worsening red, hot and painful breast with fever or marked illness, a possible abscess, or rapidly expanding swelling after injury or a procedure. Examination, antibiotics, drainage or other urgent care may be needed; do not wait for a routine scan appointment.

What is a Breast Ultrasound?

A handheld probe sends high-frequency sound waves through water-based gel on the skin. Echoes from breast tissue are converted into real-time images. The examination is external, non-invasive and does not use the ionising radiation used in X-rays and mammography.

The radiologist can examine the exact site of a symptom, characterise a finding and assess selected ducts, the tissue behind the nipple and axillary lymph nodes. Colour Doppler may be added to evaluate blood-flow patterns, but blood flow alone cannot diagnose or exclude cancer.

“Solid” Does Not Automatically Mean Cancer

Ultrasound often distinguishes a fluid-filled cyst from a solid mass. Many solid masses are benign—for example, fibroadenomas—but imaging features and clinical context determine whether reassurance, follow-up or tissue sampling is appropriate.

Ultrasound, Mammography, MRI and Biopsy Answer Different Questions

Breast ultrasound Uses sound waves to examine a symptom or imaging finding. It is particularly useful for distinguishing cystic from solid masses and for guiding needle procedures.
Diagnostic mammography Uses low-dose X-rays to evaluate breast symptoms or abnormalities. It shows the overall breast pattern and calcifications that may not be visible on ultrasound.
Screening mammography Is performed at recommended intervals in people without symptoms to detect cancer early. The screening plan depends on age, risk and local guidance.
Breast MRI Uses a magnetic field and is reserved for selected high-risk screening, staging, implant or problem-solving situations. It is not a routine replacement for mammography or ultrasound.
Needle biopsy Removes cells or tissue for laboratory examination when imaging alone cannot provide enough certainty. It may be guided by ultrasound, mammography or MRI depending on where the finding is visible.

Age influences the first imaging test, but it is not the only factor. Symptoms, pregnancy, breast density, prior imaging, family history and examination determine whether ultrasound alone or a combination is needed.

Why Might Breast Ultrasound Be Requested?

A palpable lump To examine the exact area felt by the patient or clinician.
A focal symptom Persistent localised pain, thickening or another specific breast change.
An imaging finding To characterise an area first seen on mammography, MRI, CT or another ultrasound.
Nipple discharge To assess selected ducts and tissue behind the nipple as part of a wider evaluation.

Other indications can include:

  • Assessing a possible cyst, abscess, inflammation or collection.
  • Evaluating breast symptoms during pregnancy or breastfeeding.
  • Checking axillary lymph nodes when clinically or radiologically indicated.
  • Assessing a male breast lump, asymmetry or suspected gynaecomastia.
  • Evaluating selected concerns around an implant, surgical scar or previous treatment site.
  • Following a finding categorised for short-interval imaging surveillance.
  • Guiding aspiration, core biopsy, localisation or another planned procedure.
  • Supplementing mammography in selected patients after individual risk-based advice.

General breast pain without a focal abnormality is often not caused by cancer, but new or persistent symptoms still need clinical assessment. Ultrasound is ordered when it is likely to answer the specific question.

Targeted, Whole-Breast and Axillary Ultrasound

Targeted breast ultrasound Concentrates on a palpable lump, localised symptom or finding from another examination. The radiologist correlates the precise location with the clinical or mammographic concern.
Whole-breast ultrasound Surveys the breast systematically and may be used as supplemental imaging in selected people. It takes longer and can identify benign findings that lead to additional tests.
Bilateral breast ultrasound Examines both breasts when the indication requires it. A one-sided symptom does not always mean both breasts need a complete ultrasound; the protocol follows the referral.
Axillary ultrasound Focuses on lymph nodes and other structures in the armpit. It may accompany breast imaging or be requested separately for a palpable node or staging question.
Ultrasound-guided procedure Uses live images to guide a needle into a cyst, mass or lymph node. Aspiration and biopsy are separate procedures requiring explanation, consent and sometimes medication instructions.

Bring the referral and point out the exact symptom. A clearly documented location—right or left, clock-face position and distance from the nipple—helps reliable correlation and future comparison.

What Does the Radiologist Look For?

Relationship to the symptom The first question is whether an ultrasound finding is present at the exact site of the lump, pain, thickening, discharge or other concern.
Cystic or solid composition A lesion may be a simple fluid-filled cyst, a cyst with internal material, a solid mass or a mixture of cystic and solid components.
Shape and orientation Oval, round or irregular shape and whether a mass lies parallel or non-parallel to the skin contribute to the overall assessment.
Margins and internal appearance Circumscribed, indistinct, angular or spiculated margins and the pattern of internal echoes are interpreted together—not as isolated words.
Posterior acoustic features Sound may pass easily behind a finding, create shadowing or show no posterior change. These features help characterise a mass but are not diagnostic by themselves.
Ducts and tissue behind the nipple The retroareolar region is assessed for dilated ducts, intraductal material or a mass when nipple discharge or another relevant symptom is present.
Skin and surrounding tissue Skin thickening, oedema, inflammation, collections and changes near scars or implants may be documented when relevant.
Axillary lymph nodes Shape, cortical thickness and the central fatty hilum are among the features considered. An abnormal-appearing node may need comparison, follow-up or sampling.

What Can Breast Ultrasound Miss?

  • Some breast cancers, particularly when they blend with surrounding tissue.
  • Important microcalcifications that are best detected and assessed on mammography.
  • The full distribution of disease across the breast in some patients.
  • Findings visible only on mammography or MRI and without an ultrasound correlate.
  • Very subtle skin, nipple or chest-wall disease that needs direct examination or another test.
  • Microscopic cell changes that can only be diagnosed from a biopsy specimen.

A normal ultrasound is reassuring only for the question it successfully assessed. If a distinct lump persists, examination is concerning or mammography remains abnormal, clinical review and further imaging or biopsy may still be required even when ultrasound shows no focal lesion.

How Should I Prepare?

No fasting or full-bladder preparation is required for a routine breast ultrasound. You can usually eat, drink and take your regular medicines normally.

  • Wear a two-piece outfit or clothing that is easy to remove from the waist upwards.
  • Bring the referral and all previous mammograms, ultrasounds, MRI studies and breast biopsy reports.
  • Avoid applying powder, lotion or spray deodorant to the breast or armpit on the day if your facility requests it.
  • Tell the team if you are pregnant or breastfeeding, have implants or have had breast or chest surgery.
  • Mark or be ready to point out the exact lump, pain or discharge-producing side.
  • Tell the team about severe tenderness, wounds, dressings, limited shoulder movement or mobility support needs.

If mammography or biopsy is also booked, follow the additional instructions for that examination. Do not stop antiplatelet, anticoagulant or other medicines unless the team responsible for a planned procedure gives specific instructions.

What Happens During the Scan?

1 The symptom and referral are reviewed

The radiologist confirms which breast or armpit is involved, the exact site, duration, related symptoms, clinical findings, risk factors and previous imaging.

2 Privacy and positioning are arranged

You undress from the waist upwards in private and are covered with a gown or drape. You lie on your back or slightly turned with the arm on the examined side raised comfortably.

3 The relevant area may be examined

With permission, the clinician may feel the area to correlate a palpable lump or localised change precisely with the ultrasound images.

4 Gel and the probe are applied

Water-based gel is placed on the skin and the probe is moved systematically over the breast, nipple region or armpit with gentle pressure.

5 Findings are measured and compared

Relevant images, measurements and Doppler views are saved. Earlier examinations are compared when available, and mammography may be reviewed alongside the ultrasound.

6 A report and recommendation are prepared

The radiologist assigns an assessment and recommends the next step when needed. A planned aspiration or biopsy requires separate explanation and consent.

A targeted scan often takes about 15–30 minutes; bilateral or whole-breast assessment may take longer. Pressure can be uncomfortable over a tender area, but the procedure is usually painless. Normal activities can generally be resumed immediately.

What Do Common Report Terms Mean?

Simple cyst A thin-walled fluid-filled area with classic benign ultrasound features. It usually needs no treatment unless it is symptomatic or the clinical situation requires action.
Complicated cyst A cyst contains internal echoes or debris but no definite solid component. Management depends on the full appearance, symptoms and local breast-imaging protocol.
Complex cystic and solid mass A finding contains both fluid and a true solid component. This is different from a simple cyst and commonly requires specialist assessment and possible tissue sampling.
Fibroadenoma-like / probably benign mass A solid mass has features often seen with a benign fibroadenoma. Depending on age, size, symptoms and stability, follow-up or biopsy may be recommended.
Hypoechoic mass The area appears darker than surrounding tissue. “Hypoechoic” only describes brightness and does not state whether the mass is benign or malignant.
Duct ectasia One or more milk ducts are wider than usual. This can be benign, but discharge type and any material or mass within a duct affect the recommendation.
No sonographic correlate Ultrasound shows no matching abnormality at the reported site. This does not cancel a real physical or mammographic finding; management follows the remaining clinical concern.
Reactive axillary node A lymph node has features commonly associated with immune response or inflammation. Recent infection, vaccination and the rest of the breast assessment provide context.

What is BI-RADS?

BI-RADS means Breast Imaging Reporting and Data System. It standardises breast-imaging terminology, the final assessment and the management recommendation across mammography, ultrasound and MRI. It is not a cancer stage.

BI-RADS 0 — Incomplete Additional imaging or earlier studies are needed before a final assessment can be made.
BI-RADS 1 — Negative No imaging abnormality is identified. A persistent or concerning physical finding still requires clinical correlation.
BI-RADS 2 — Benign A definite benign finding is present, such as a classic simple cyst, with routine care advised.
BI-RADS 3 — Probably benign The finding has a very low likelihood of malignancy and is commonly monitored with short-interval imaging to confirm stability.
BI-RADS 4 — Suspicious The finding is not characteristically benign, so tissue diagnosis is generally recommended. Subcategories may communicate different levels of imaging concern.
BI-RADS 5 — Highly suggestive of malignancy The imaging pattern is strongly concerning and prompt tissue diagnosis and specialist care are required.
BI-RADS 6 — Known biopsy-proven malignancy Cancer has already been confirmed by tissue sampling and the imaging is being used in its management.

Read the category together with the written recommendation. A BI-RADS number summarises imaging management; it does not replace biopsy results or an individual discussion with the breast team.

What Happens if the Scan Finds Something?

Many breast findings are benign. The next step depends on whether the imaging explains the symptom, how the feature is categorised and whether examination, mammography and ultrasound agree.

  • No further imaging for a confidently benign finding, with usual clinical care.
  • Diagnostic mammography or additional mammographic views for complete assessment.
  • Short-interval ultrasound follow-up to document stability of a probably benign finding.
  • Needle aspiration when a cyst is painful, infected or requires fluid assessment.
  • Ultrasound-guided core biopsy of a breast mass or axillary lymph node.
  • Mammography- or MRI-guided biopsy when the finding is visible only with that method.
  • Breast surgeon, breast physician or multidisciplinary breast-team review.
  • Clinical reassessment or further imaging when a persistent lump has no ultrasound correlate.

Ask how and when results will be communicated and who is arranging any recommended test. Do not assume that “follow-up advised” or “biopsy recommended” has been scheduled automatically.

Myth vs Fact

Myth Breast ultrasound exposes the breast to radiation.
Fact Ultrasound creates images using sound waves and no ionising radiation. Mammography uses low-dose X-rays and provides different, often complementary information.
Myth A solid breast lump is always cancer.
Fact Many solid masses are benign. Shape, margins, other imaging, examination and sometimes biopsy determine the diagnosis.
Myth A normal breast ultrasound rules out every breast cancer.
Fact Ultrasound can miss cancers and microcalcifications. A persistent physical finding or mammographic abnormality may still require further assessment or biopsy.
Myth Ultrasound can simply replace screening mammography.
Fact Ultrasound may supplement mammography for selected people but is not generally a stand-alone substitute for an advised screening mammogram.

Frequently Asked Questions

Do I need to fast for a breast ultrasound?

No. You can normally eat, drink and take regular medicines. Follow separate instructions if a mammogram, biopsy or another procedure is booked for the same visit.

Is breast ultrasound safe during pregnancy or breastfeeding?

Ultrasound does not use ionising radiation and is commonly used when breast imaging is needed during pregnancy or breastfeeding. The breast team decides whether mammography or another test should also be included for the specific symptom.

Will both breasts be scanned?

Not always. A targeted examination may focus on one precise area, while some referrals require both breasts or a whole-breast survey. The protocol follows the symptom and clinical question.

Can ultrasound distinguish a cyst from a solid lump?

Often, yes. A classic simple cyst has recognisable fluid features. Solid or mixed findings are assessed using multiple features and may require follow-up or biopsy.

Do dense breasts mean I need ultrasound?

Not automatically. Supplemental imaging depends on overall breast-cancer risk, mammographic density, local guidance and the benefits and drawbacks of additional testing. Discuss an individual plan with the breast-imaging or treating team.

Will a biopsy be performed at the same appointment?

Only if it was planned or the breast service is organised to complete same-day assessment and you provide informed consent. A routine ultrasound does not automatically include a biopsy.

What if I can feel a lump but the ultrasound is normal?

Return to the referring clinician or breast specialist. They may re-examine the exact area, review whether mammography or MRI is appropriate or recommend tissue sampling if the physical finding remains concerning.

Can men have a breast ultrasound?

Yes. Ultrasound and mammography are used in men when appropriate to assess a lump, focal change, gynaecomastia or an axillary concern. A new male breast lump also requires clinical assessment.

When will I receive the result?

The radiologist issues a formal report to the referring clinician. Some breast clinics discuss imaging on the same day, while other services report later. Biopsy results take longer. Ask how and when each result will be communicated.

Related Patient Guides

A new lump needs clinical correlation, while selected imaging findings require planned tissue sampling.

General Surgery Breast Lump Clinical Review / Triple Assessment Read clinical guide → Radiology Ultrasound-Guided Biopsy Core Sampling / Aspiration / Results Read procedure guide → Radiology Antenatal Ultrasound Pregnancy and Obstetric Scans Read scan guide →

A Note From Our Doctors

The information on this page is intended to help you understand your condition. It should not be considered a diagnosis or a substitute for a consultation with a qualified medical professional.

Every patient is unique. The same symptom can have different causes in different individuals, and the most appropriate investigations and treatment depend on your medical history, examination findings, age, existing medical conditions and test results.

At SR Speciality Hospital, we believe in treating the whole patient—not just a symptom, scan or laboratory report. Every treatment plan is individualised after careful medical evaluation.

Radiology Appointments

Have you been advised to undergo breast ultrasound?

Contact the hospital with the exact referral and bring previous breast imaging and biopsy reports. A new breast lump or nipple and skin change should be clinically assessed even if imaging has been performed before.

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