Diagnostic Test
Urine Cytology
A microscopic check of your urine to spot abnormal or cancerous cells from the lining of the urinary tract. A key tool for UK urologists to detect high-grade urothelial cancer in the bladder, ureter or kidneys.
Key Takeaways
- A microscopic check of your urine to spot abnormal or cancerous cells from the lining of the urinary tract. A key tool for UK urologists to detect high-grade urothelial cancer in the bladder, ureter or kidneys.
- We offer specialist interpretation and related treatments. Book a consultation to discuss your options.
Overview
About Urine Cytology
Urine cytology is a laboratory test where a specialist (a pathologist) looks at a sample of your pee under a high-powered microscope. They are looking for "exfoliated" cells—these are cells that have naturally shed from the lining of your bladder, kidneys, or the tubes in between (ureters). By checking the shape and size of these cells, they can see if there are any signs of cancer or significant inflammation.
Test Information
Understanding Your Test
A detailed guide to your diagnostic procedure — from essential preparation and the purpose of the test to safety considerations and what to expect during the process.
From your perspective, this is a very simple "pee in a pot" test. You will be given a sterile container to collect your sample. You will usually be asked for a "mid-stream" sample—this means you start peeing into the toilet, catch the middle bit in the pot, and finish back in the toilet. This sample is then sent to a specialist UK laboratory to be processed and reviewed.
No. This test is completely non-invasive and painless. It is as simple as providing a standard urine sample for a routine health check.
This test is usually done alongside other checks, like a bladder camera (cystoscopy) or an ultrasound scan, to investigate haematuria (blood in the urine). It is particularly helpful for finding "Carcinoma in Situ" (CIS). This is a flat, aggressive type of bladder cancer that can sometimes be very difficult to see with the naked eye during a standard camera check but shows up clearly under a microscope.
At a glance
Preparation required
- Avoid the "first-void": Do not use your very first pee of the morning. Cells that have sat in the bladder overnight can break down, making them harder to read.
- The "second pee" is best: Usually, the second time you go in the morning provides the clearest sample.
- Label clearly: Ensure your name, date of birth, and the time you took the sample are written on the container.
- Stay hydrated: Drink a normal amount of water so you can provide a sufficient amount of urine (usually at least 30ml–50ml).
Risks or considerations
- Slow-growing tumours: This test is excellent at finding aggressive (high-grade) cancer, but it is less "sensitive" to slow-growing, low-grade tumours, which might look like normal cells.
- False Positives: Sometimes, things like bladder stones or a recent infection can make cells look "atypical" or unusual, even if no cancer is present.
- Expert Review: In the UK, these samples must be interpreted by a highly trained cytopathologist to ensure the most accurate result.
What it can help diagnose
- High-grade Bladder Cancer: Aggressive cells that require prompt treatment.
- Carcinoma in Situ (CIS): Flat areas of cancerous cells on the bladder lining.
- Upper Tract Cancers: Identifying issues in the ureters or kidneys.
- Viral Infections: Such as the Polyomavirus, which can affect the urinary tract.
- Inflammatory Conditions: General irritation or inflammation that needs further investigation.
Our Commitment
Care you can trust
Every test is delivered to the same standard: senior consultants, a personalised plan, and the safety of an accredited private hospital behind you.
Consultant-Led Excellence
Receive evidence-based treatments delivered by senior NHS consultants in a professional, specialist setting.
Personalised Care Plans
Your consultant will design a bespoke treatment plan tailored to your specific health goals and lifestyle.
Hospital-Grade Safety
We operate within leading private hospitals, adhering to strict CQC safety and technology standards.
A Heritage of Trust
Our partners bring decades of NHS and private experience, successfully managing thousands of patient cases.
Patient Guidance
Frequently Asked Questions
Common questions about this test and what to expect
3 questions
Not necessarily. Urine cytology is highly specific (it is great at confirming cancer when it sees it), but it has lower sensitivity for low-grade, non-aggressive tumours. Because these slow-growing cells often look almost normal under a microscope, they can be missed. This is why cytology is always used in combination with other tests like a cystoscopy or an ultrasound.
Reviewed 2 Mar 2026
Was this helpful?
Urine that has been sitting in your bladder all night is more acidic, which can cause the delicate cells within it to break down or 'degenerate.' For a pathologist to get a clear view, they need fresh, well-preserved cells. Using your second urine of the day ensures the cells are in the best possible condition for analysis.
Reviewed 2 Mar 2026
Was this helpful?
An 'atypical' result means the pathologist saw cells that don't look perfectly normal, but they aren't clearly cancerous either. This is often caused by non-cancerous irritation, such as a recent urinary tract infection or a kidney stone. If your result is atypical, your urologist will usually recommend a follow-up test or a repeat cytology in a few weeks once any inflammation has settled.
Reviewed 2 Mar 2026
Was this helpful?