Urine Transitional Epithelial Cells Biomarker Testing
It measures bladder/urinary-tract lining cells in urine to help interpret irritation or infection, with easy ordering and Quest draw access via Vitals Vault.
With Vitals Vault, you have access to a comprehensive range of biomarker tests.
Transitional epithelial cells are cells that naturally line parts of your urinary tract, especially the bladder and ureters. A urine transitional epithelial cells result comes from looking at your urine under a microscope (urine sediment microscopy) and counting how many of these cells are present.
Seeing a small number can be normal, especially if the sample was not a perfectly “clean-catch.” Higher amounts can be a clue that the lining of the urinary tract is irritated or inflamed, and it can also help your clinician judge whether a urine sample might be contaminated.
This marker is rarely interpreted on its own. It is most useful when you read it alongside other urinalysis findings like white blood cells, red blood cells, bacteria, nitrites, and leukocyte esterase.
Do I need a Urine Transitional Epithelial Cells test?
You may benefit from this test if you are getting a urinalysis because you have urinary symptoms such as burning with urination, urgency, frequency, pelvic discomfort, or foul-smelling urine. In that setting, transitional epithelial cells can add context about whether your bladder lining may be irritated and whether other findings point toward infection.
You might also see this marker reported when you are being evaluated for blood in the urine (hematuria), kidney stones, or unexplained urinary discomfort. It does not diagnose a specific condition by itself, but it can support a more complete interpretation of the urine sediment.
If you are monitoring a known issue—such as recurrent UTIs, bladder inflammation, or recovery after a procedure—your clinician may use repeat urinalysis results (including epithelial cell counts) to see whether the urine sediment is trending back toward normal.
Testing is most helpful when it is used to guide clinician-directed care rather than self-diagnosis, because the meaning depends on symptoms, collection technique, and the rest of your urinalysis.
This result is typically generated by CLIA-certified laboratory urinalysis with microscopic examination; it supports clinical evaluation but is not a standalone diagnosis.
Lab testing
Order a urinalysis with microscopy to see transitional epithelial cells and related urine sediment findings in one report.
Schedule online, results typically within about a week
Clear reporting and optional clinician context
HSA/FSA eligible where applicable
Get this test with Vitals Vault
If you want a clear, report-based view of what is showing up in your urine sediment, you can order urinalysis testing through Vitals Vault and complete your sample collection through a national lab network.
Once your results are in, PocketMD can help you translate what “transitional epithelial cells” means in the context of the rest of your urinalysis—such as whether white blood cells, nitrites, or bacteria are also present—and what questions to bring to your clinician.
This is especially useful when you are deciding whether to retest after a borderline or contaminated sample, or when you want to pair urinalysis findings with other labs based on your symptoms and history.
- Order labs directly and view results in one place
- PocketMD guidance for next-step questions and retest timing
- Convenient access to Quest draw locations
Key benefits of Urine Transitional Epithelial Cells testing
- Adds context to urinalysis when you have UTI-like symptoms but the picture is not straightforward.
- Helps distinguish a true urinary tract process from a sample that may be contaminated or poorly collected.
- Supports interpretation of bladder irritation or inflammation when paired with urine white and red blood cells.
- Can guide whether a repeat clean-catch sample is worth doing before treatment decisions are made.
- Provides a baseline you can trend over time if you have recurrent urinary symptoms.
- Complements urine culture decisions by clarifying whether microscopy findings fit infection.
- Makes your urinalysis easier to act on by connecting the microscopy result to the rest of your report in PocketMD.
What is Urine Transitional Epithelial Cells?
Transitional epithelial cells (also called urothelial cells) are the cells that line the inside of the urinary tract where the tissue needs to stretch and contract, especially the bladder and ureters. These cells can shed into urine naturally, so a small number may appear even when you are healthy.
A “urine transitional epithelial cells” result comes from microscopic urinalysis, where a lab professional or an automated system examines the urine sediment and reports epithelial cells by type and amount (often as a count per high-power field or as categories such as rare, few, moderate, or many).
Because epithelial cells can enter the sample from different parts of the urinary tract—or from the skin/genital area during collection—the type of epithelial cell matters. Transitional epithelial cells suggest a source from the urinary tract lining, while squamous epithelial cells more often suggest external contamination.
Your clinician usually interprets this result together with symptoms and other urine findings. For example, transitional epithelial cells plus white blood cells and bacteria supports inflammation or infection more than transitional epithelial cells alone.
Where they come from
Transitional epithelial cells originate from the urothelium, the specialized lining of the renal pelvis, ureters, bladder, and part of the urethra. Shedding can increase when the lining is irritated (for example, from infection, stones, or instrumentation).
How the lab reports it
Reporting varies by lab. You may see a numeric estimate (such as cells per high-power field) or a semi-quantitative scale (rare/few/moderate/many). The most useful way to read it is relative to the lab’s reference language and the rest of your urinalysis.
What do my Urine Transitional Epithelial Cells results mean?
Low or none detected
A low result or “none seen” is usually reassuring and often considered normal. It suggests there is not much shedding from the urinary tract lining at the time of collection. If you still have strong urinary symptoms, your clinician will look closely at other markers (white blood cells, nitrites, leukocyte esterase, bacteria) and may consider a urine culture or repeat testing.
In-range / expected finding
An in-range or “rare/few” amount can be normal, especially if you are well-hydrated and collected a clean-catch midstream sample. In this range, the result typically does not change management by itself. It mainly serves as supporting information that your urine sediment looks consistent with a good-quality sample.
High transitional epithelial cells
A higher amount can mean the urinary tract lining is irritated or inflamed, but it is not specific for one diagnosis. It may be seen with urinary tract infections, bladder inflammation, kidney or bladder stones, or after procedures that irritate the urinary tract (such as catheter use). If the result is high, it is most meaningful when you also consider whether white blood cells, red blood cells, and bacteria are elevated and whether you have symptoms.
Factors that influence this result
Collection technique is a major factor: a non–clean-catch sample can change the epithelial cell picture and make interpretation harder. Recent sexual activity, menstruation, dehydration, and vigorous exercise can also affect urine sediment findings. Medications and recent urinary procedures can irritate the lining and increase shedding. Finally, timing matters—an early infection or a partially treated infection can produce mixed results, so repeat testing or culture may be needed if symptoms persist.
What’s included
Frequently Asked Questions
What are transitional epithelial cells in urine?
They are cells shed from the lining of the urinary tract (urothelium), especially the bladder and ureters. A small amount can be normal, while higher amounts can appear with irritation or inflammation and should be interpreted with the rest of your urinalysis.
What is a normal range for transitional epithelial cells?
Normal reporting depends on the lab and may be shown as “none/rare/few” or as a count per high-power field. In general, none to a small number is often considered expected, but your lab’s reference language and your other urine findings matter more than a single cutoff.
Does high transitional epithelial cells mean I have a UTI?
Not necessarily. High transitional epithelial cells can be seen with UTIs, but they can also rise with bladder irritation, stones, or recent urinary procedures. A UTI is usually supported by symptoms plus findings like elevated urine WBCs, positive leukocyte esterase or nitrites, bacteria on microscopy, and sometimes a positive urine culture.
How is this different from squamous epithelial cells in urine?
Transitional epithelial cells are more consistent with shedding from the urinary tract lining. Squamous epithelial cells more often come from the skin or outer genital area and can suggest the sample was contaminated, especially if there are many squamous cells.
Do I need to fast for a urine microscopy test?
Fasting is usually not required for urinalysis with microscopy. Hydration can affect concentration of urine, so follow your clinician’s instructions and avoid overhydrating right before the test unless you are told to drink water for collection.
When should I retest if my result was high or my sample was contaminated?
If your clinician suspects contamination (often suggested by many squamous cells or an inconsistent pattern), a repeat clean-catch sample may be recommended soon—sometimes within days—especially if symptoms continue. If you were treated for a UTI, retesting timing depends on symptoms and whether a culture was done, so it is best to follow a clinician’s plan.
What other urine tests help interpret transitional epithelial cells?
The most helpful companions are urine WBCs and RBCs, leukocyte esterase, nitrites, bacteria on microscopy, and urine culture when infection is a concern. Depending on your situation, your clinician may also consider urine protein, microalbumin, or kidney function blood tests.