Breast Health · Types of Scan

Screening vs Diagnostic Breast Ultrasound

The same machine, two very different jobs. Which one applies to you depends on one question: do you have a symptom?

Desk diary open at a week view with a pen and coffee while planning a health appointment

A diagnostic scan investigates something specific — a lump you can feel, a painful area, a change you noticed. A screening scan looks for changes in someone with no symptoms at all. The equipment is identical; the purpose, the interpretation and the value of the result are not.

The distinction matters because the word “screening” carries weight it has not earned in the private ultrasound market, and knowing which one you are buying tells you what the result actually means.

Side by Side

The difference in practice

Diagnostic Screening
Why you are there A specific symptom or finding No symptoms — looking for the unexpected
How it is performed Focused on the area of concern, plus a full survey Systematic survey of both breasts and armpits
What a normal result means The symptom has no visible structural cause on ultrasound Nothing visible today — it does not cover the interval ahead
Evidence behind it Well established as first-line for a symptom, especially under 40 Not an evidence-based population screening test on its own
Should follow-up happen anyway? Yes if your GP is concerned on examination Yes — attend NHS breast screening when invited
Being Straight

What we will and will not claim

We sell scans, so weigh this accordingly — and then consider it anyway. Ultrasound alone is not a breast screening programme. Population screening in the UK is mammography, offered by the NHS to women aged 50 to 71 roughly every three years, and that is where the evidence for reducing deaths sits. Booking a private ultrasound instead of attending your screening appointment is a straightforwardly worse decision.

Where ultrasound genuinely earns its place without a symptom: as an addition when you have been told your breasts are dense, and as the first-line test for a symptom in younger women, where mammography reads poorly. Those are real uses. “Annual ultrasound instead of screening” is not one, and we will say so if you ask us for it.

The other half of the honesty: a normal scan describes today. It cannot tell you nothing will change next month, which is exactly why any programme worth the name has intervals and recall built in — and why a new symptom always gets assessed regardless of a recent clear result.

At IUS London

Which one you are booking

  1. 1
    Tell us why you are comingA symptom means a diagnostic scan focused on that area. No symptoms means a systematic survey. Same 30-minute appointment, different emphasis — and we need to know which.
  2. 2
    The scanWarm gel and a small probe over both breasts and armpits, with extra attention wherever you have pointed.
  3. 3
    Results in contextExplained on screen as we scan, written report usually within two hours — stating plainly what was examined and what a normal result does and does not cover.
  4. 4
    RoutingIf your situation calls for mammography, MRI or a breast clinic, the report says so. We do not offer those tests here.
FAQs

Your questions answered

Can I have a breast ultrasound with no symptoms?
Yes, and it is most useful when there is a reason — dense breast tissue, or a specific worry you want addressed. What it is not is a substitute for NHS mammographic screening if you are in the invited age range.
Should I have one every year?
Annual private ultrasound is not an established screening interval and we will not recommend it as a routine. If you are in the NHS screening age range, attend that. If you have a strong family history, ask your GP about formal risk assessment, which can lead to a proper surveillance programme.
Is a diagnostic scan more thorough?
It is more targeted — the area you are worried about gets detailed attention alongside the general survey. Both cover both breasts and armpits.
My scan was clear. Do I still need my NHS mammogram?
Yes. Mammography detects microcalcifications that ultrasound cannot see, and screening works through repeated rounds at set intervals rather than one-off tests. Attend when invited.
I have dense breasts — what should I do?
Keep attending mammographic screening, and consider ultrasound as an addition for the tissue a mammogram reads less well. Discuss the combination with your GP so it is a plan rather than a patchwork.
What if I find something soon after a clear scan?
Get it assessed. A recent normal scan never overrides a new symptom — see your GP, who can refer you to a breast clinic where examination, imaging and biopsy happen together.
Related

Where to go from here

SymptomsWhen to Get a Breast Ultrasound

Lumps, pain and changes — and which need your GP first.

Read the guide →CompareUltrasound vs Mammogram vs MRI

What each test sees, and which one answers your question.

Read the guide →DetectionUltrasound and Early Detection

What the scan contributes, stated without overselling.

Read the guide →

Booked for the right reason

Tell us why you are coming and the scan is shaped around it — findings explained on screen as we scan, and a written report usually within two hours that says plainly what was covered.

From £189
Breast ultrasound scan

Breast ultrasound

5a Lucerne Mews
Kensington, London W8 4ED
3 mins from Notting Hill Gate

This article is general information about breast imaging, not individual medical advice. Ultrasound alone is not a substitute for the NHS breast screening programme — see NHS guidance on breast screening, and attend when invited. Any new breast change should be assessed by your GP.

Written and clinically reviewed by the HCPC-registered sonographers who perform this scan at IUS London — a CQC-registered diagnostic ultrasound clinic (Provider ID 1-2775844974). Your own findings are explained to you at the scan and set out in your report.

Author: Yianni Kiromitis, Senior Sonographer, HCPC RA38415 — over 20 years’ experience in NHS and private ultrasound
Medically reviewed: 9 August 2026