Testicular Ultrasound: The Complete Guide
What the scan involves, what it can find, how to prepare, and how to read your report — a consultant sonographer explains everything you need to know before your testicular ultrasound.
- Men's Health
- Updated July 2026
What Is a Testicular Ultrasound?
A testicular ultrasound (also called a scrotal ultrasound) is a non-invasive imaging investigation that uses high-frequency sound waves to produce real-time images of the testes, epididymides, and surrounding scrotal structures. It is the first-line imaging modality for any scrotal symptom — a lump, pain, swelling, or change in size — and provides information that clinical examination alone cannot.
At Sonoworld, testicular ultrasound is performed using a high-frequency linear probe (12–15 MHz) that provides detailed greyscale images of the testicular parenchyma alongside colour Doppler assessment of blood flow. The combination of greyscale and Doppler is essential: greyscale identifies structural abnormalities; Doppler distinguishes between conditions that look similar on greyscale but require different management (for example, epididymo-orchitis, which shows increased flow, versus testicular torsion, which shows absent or reduced flow).
Is a testicular ultrasound embarrassing?
Many men find the idea uncomfortable, and it is worth saying plainly rather than pretending otherwise. Almost everyone tells us afterwards that the anticipation was worse than the event.
Here is exactly what happens, so there are no surprises:
- It takes about five minutes. The scan itself is short. Most of your appointment is the conversation before and after it.
- You are in a private room with the door closed throughout.
- You are draped. You lie on your back with a towel placed over your thighs, and only the area being scanned is uncovered. You are not exposed for the whole appointment.
- A chaperone is available on request. Ask when you book, or at the appointment — you do not need to give a reason.
- Your sonographer may be male or female. We will not promise you one or the other, because it depends on who is scanning that day. If this matters to you, tell us when booking and we will tell you honestly what we can arrange.
- Warmed gel is applied and a small probe is moved over the skin. There are no needles, nothing internal, and it should not hurt — though if an area is already tender, pressure there may be briefly uncomfortable.
We have been performing testicular ultrasounds for years. To the person scanning you, this is a routine medical examination of one part of the body, approached exactly the same way as examining a hand or a shoulder. It is not remarkable to us, and nothing about it will be treated as remarkable.
The thing that actually causes harm is not embarrassment — it is delay. Testicular cancer is the most common cancer in men aged 15 to 40, and it is highly curable when caught early. Outcomes are excellent for men who get a lump checked quickly and considerably worse for those who wait months. If you have found a lump, a change in size or shape, or a heavy ache that will not settle, please get it looked at now. Five uncomfortable minutes is a very small price.
How to Prepare
No special preparation is required for a testicular ultrasound. You do not need to fast, have a full bladder, or avoid any medications. Wear comfortable, loose clothing. The scan is performed with you lying on an examination couch; the sonographer will provide a towel to keep you comfortable during the procedure.
What Happens During the Scan
The scan takes approximately 20 minutes. Warm ultrasound gel is applied to the scrotal skin, and a small probe is moved gently over the surface. There are no needles, no compression, and no instruments inserted into the body. The procedure is painless in the vast majority of cases; if there is pre-existing tenderness, the sonographer will adjust the pressure accordingly.
Both testes and epididymides are assessed systematically — size, volume, echotexture, and any focal lesion. Colour Doppler is applied to both sides to compare blood flow. The sonographer will explain what they are looking at as the scan progresses and will give you a verbal summary of findings immediately after the scan.
What the Scan Can Find
| Finding | What It Means | Action |
|---|---|---|
| Epididymal cyst / spermatocele | Benign fluid-filled cyst in the epididymis | Reassurance; no treatment needed |
| Hydrocele | Fluid collection surrounding the testis | Usually benign; large or complex hydroceles may need urology review |
| Varicocele | Dilated pampiniform plexus veins | May affect fertility; urology referral if symptomatic or fertility concern |
| Epididymo-orchitis | Infection/inflammation of epididymis ± testis | GP for antibiotic treatment |
| Testicular microlithiasis | Multiple small calcifications in testicular parenchyma | Annual self-examination; follow-up if risk factors present |
| Solid intratesticular mass | Testicular tumour until proven otherwise | Same-day urology referral |
| Absent Doppler flow | Possible testicular torsion (if acute pain) | Immediate A&E attendance |
How to Read Your Report
The Sonoworld testicular ultrasound report documents: testicular dimensions (length, width, depth, and volume for each testis), echotexture (homogeneous = normal; heterogeneous = abnormal), any focal lesion (location, size, echogenicity, vascularity), epididymal findings, extratesticular findings (hydrocele, varicocele), and Doppler assessment. The report concludes with a clinical impression and recommendation.
Key terms to know:
- Hypoechoic: Darker than the surrounding tissue on ultrasound. A hypoechoic intratesticular lesion is the classic appearance of a testicular tumour.
- Hyperechoic: Brighter than the surrounding tissue. Microcalcifications appear hyperechoic.
- Anechoic: No internal echoes — appears completely dark. Cysts and fluid collections are anechoic.
- Heterogeneous: Non-uniform internal texture — a mix of echogenicities. Abnormal in the testis.
- Vascularity: Blood flow detected on Doppler. Increased vascularity in a focal lesion raises concern for malignancy or infection.
For a full explanation of your specific findings, see: Interpreting Your Testicular Ultrasound Results
From Our Practice
The question patients ask most often before a testicular ultrasound is: "What are you actually looking for?" The honest answer is that we are looking for a solid mass within the testicular parenchyma — a finding that would require urgent onward referral. Everything else — cysts, hydroceles, varicoceles, inflammation — is a finding that can be explained, contextualised, and managed without urgency. The scan is designed to answer the most important question first, and then to characterise whatever else is present.
The second most common question is: "Will I know the result today?" Yes. Verbal results are given in the room immediately after the scan. The written report is sent within 24 hours. There is no waiting for a GP appointment to find out what the scan found.
Observations above are drawn from composite patterns across our patient population, not from any individual case.
Testicular Ultrasound FAQs
Is a testicular ultrasound the same as a scrotal ultrasound?
Yes. The terms are used interchangeably. A scrotal ultrasound assesses all structures within the scrotum — both testes, both epididymides, and the surrounding scrotal wall and fluid. A testicular ultrasound refers to the same investigation.
How accurate is testicular ultrasound?
Scrotal ultrasound has a sensitivity of approximately 95% and specificity of 95–99% for detecting testicular tumours. It is the definitive imaging investigation for scrotal pathology and is more accurate than clinical examination alone for characterising the nature of a scrotal finding.
Is a testicular ultrasound embarrassing?
Most men tell us the anticipation was worse than the event. The scan takes about five minutes in a private room with the door closed. You are draped with a towel and only the area being scanned is uncovered. A chaperone is available on request — just ask, you do not need to give a reason. Your sonographer may be male or female. To the person performing it, this is a routine medical examination of one part of the body, approached no differently from examining a hand.
Does a testicular ultrasound hurt?
No. A testicular ultrasound is non-invasive and painless. Warm gel is applied to the scrotal skin and a small probe is moved gently over the surface. There are no needles, no compression, and no instruments inserted into the body. If there is pre-existing tenderness, the sonographer will adjust the pressure accordingly.
Do I need a GP referral?
No. You can self-refer for a testicular ultrasound at Sonoworld. No GP letter or referral is required. The written report is sent directly to you within 24 hours, and you can choose to share it with your GP or specialist.
When will I get my results?
Verbal results are given in the room immediately after the scan, and the written report follows within 24 hours by secure email. If the scan finds something that requires urgent action, you will be told clearly in the room and the report will be prepared immediately.
What is the difference between a lump inside and outside the testis?
This is the most important distinction the scan makes. A lump outside the testis — in the epididymis or surrounding structures — is almost always benign (an epididymal cyst, hydrocele, or varicocele). A solid lump inside the testis itself is treated as testicular cancer until proven otherwise and requires urgent urology referral. This distinction cannot be made reliably by clinical examination alone, which is why the scan is the definitive investigation.
How much does a testicular ultrasound cost?
A testicular ultrasound at Sonoworld is £235, all-inclusive: the scan, instant verbal results in the room, and a written report within 24 hours. There are no separate reporting or booking fees.
What if the scan finds something serious?
If the scan identifies a solid intratesticular mass, you will be told clearly and calmly in the room what has been found and what needs to happen next. A written report is prepared immediately and you will be advised to contact your GP or attend a urology clinic the same day. The report uses the clinical language the receiving clinician needs to act on it promptly under the two-week-wait pathway.
Book a Testicular Ultrasound Scan
£235 · Same-day appointments · No GP referral needed · Verbal results in the room · Written report the same day
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