Microarray-based genomic analysis for cancer-associated genetic alterations (e.g., tumor DNA from plasma)
This test examines small amounts of DNA from your blood to identify specific genetic changes that may be linked to certain cancers, such as those in the breast, prostate, or lung.
["Helps detect cancer-related genetic mutations that may influence treatment options."]
Key facts at a glance
- LOINC
- 62343-9
- Short code
- CMA # change pnl Microarray
- Synonyms
- CMA # change pnl Microarray
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- microarray
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What This Test Measures
The test uses a specialized microarray platform to analyze circulating tumor DNA (ctDNA) in your blood plasma. It looks for known genetic mutations or alterations that are commonly found in tumors of specific cancers, such as those in the breast, prostate, or lung. These genetic changes can help doctors determine if cancer is present, assess its spread, or guide personalized treatment decisions.
How the Test Works
A small blood sample is drawn and processed to extract DNA. This DNA is then analyzed using a microarray that contains probes targeting known cancer-related genetic sequences. The test detects whether these sequences are present in abnormal amounts, indicating possible cancer-related genetic alterations.
Why It Might Be Ordered
Your healthcare provider may recommend this test if you have a history of cancer, are at high risk for certain cancers, or are undergoing treatment to monitor for recurrence or progression. It can also be used to help select targeted therapies based on genetic findings.
What to Expect Before the Test
No special preparation is typically required, but you may need to fast for a few hours before the blood draw if instructed by your doctor. Wear comfortable clothing and plan to rest for a short time afterward, as you might feel lightheaded.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
What does this test tell me about my cancer risk or treatment options?
Will I need to do anything special before this test?
How long will it take to get my results?
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