Cell-free DNA (cfDNA) quantitative measurement using a specific nucleic acid probe for a particular genetic marker (e.g., tumor-associated or inherited variant)
This test measures tiny fragments of DNA found naturally in your blood, which can sometimes come from tumors or other conditions. It uses a specialized probe to detect specific genetic sequences.
["This test helps identify certain genetic markers that may indicate conditions like cancer or genetic predispositions."]
Key facts at a glance
- LOINC
- 101816-7
- Short code
- CMV DNA Ur NAA+probe-aCnc
- Synonyms
- CMV DNA Ur NAA+probe-aCnc
- 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
How the Test Works
Your blood sample is collected and processed to extract cell-free DNA (cfDNA). A specialized probe targets a specific genetic sequence, allowing the test to detect its presence with high sensitivity. The result reflects the concentration of this DNA fragment in your bloodstream.
What to Expect Before the Test
No special preparation is needed for this test. You may have a simple blood draw, similar to other routine blood tests. If you’re taking medications or have certain health conditions, let your healthcare provider know before the test.
Possible Uses and Benefits
This test may be used in research, early cancer detection, or monitoring certain genetic conditions. It can provide insights into genetic variations that might not be detected by standard blood tests alone.
What the Results Mean
Results are qualitative (present or absent) for the specific probe sequence. A positive result means the probe detected the targeted genetic sequence, which may warrant further evaluation by a healthcare professional.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
cfDNA Probe Test
Frequently asked questions
Why might my doctor order this test?
What if the test is positive?
How often should I get 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