Epidermal keratin DNA (quantitative) in urine using a probe-based assay
This test measures the presence of DNA from the outer layer of skin cells (epidermal keratin) in your urine. It may be used to assess kidney function or detect certain conditions affecting the skin or urinary system.
["This test helps monitor kidney health or identify skin-related disorders by detecting shed skin cells in urine."]
Key facts at a glance
- LOINC
- 99030-9
- Short code
- S epidermidis DNA Ur Ql NAA+probe
- Synonyms
- S epidermidis DNA Ur Ql NAA+probe
- Category
- chemistry
- Sample
- urine
- Container
- Sterile urine container
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- probe-amp-tar
- Specimen volume
- 10 mL
- Stability
- Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
Why This Test Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms like kidney problems (such as protein in urine), skin conditions (like psoriasis or eczema), or if you’re undergoing treatment for conditions that could affect skin cell shedding. It can also be part of a broader evaluation for urinary tract issues or kidney disease.
What to Expect Before the Test
No special preparation is needed. You’ll likely provide a urine sample in a clean container, similar to a routine urine test. Avoid excessive exercise or strenuous activity 24 hours before testing to ensure accurate results.
What the Test Results Mean
Results may indicate normal shedding of skin cells, potential kidney dysfunction, or conditions affecting skin turnover. Elevated levels could signal kidney problems, urinary tract infections, or certain dermatological conditions. Your provider will interpret results in the context of your overall health.
Common Conditions Monitored or Diagnosed
This test may help diagnose or monitor conditions like chronic kidney disease, urinary tract infections, or skin disorders such as psoriasis. It can also assist in evaluating kidney function in patients with unexplained proteinuria or hematuria.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Elevated epidermal keratin DNA in urine can signal kidney issues, such as glomerular damage, where the kidneys filter blood improperly. It may also reflect urinary tract inflammation or infection. For skin-related conditions, increased shedding could correlate with active dermatological diseases, though further testing would confirm diagnosis. This test is not a standalone diagnostic for skin disorders but supports broader evaluations.
Short name
Urine Epidermal Keratin DNA Probe Test
Frequently asked questions
What does a positive or abnormal result mean?
Is this test painful or uncomfortable?
How often can I expect to have this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy