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Genetic Mutation Screening in Whole Blood (via Polymerase Chain Reaction)

Published: August 9, 2026Updated: August 16, 2026

This test checks for specific genetic mutations in your blood, which may be linked to inherited conditions or cancer risks.

Quick summary

["A genetic mutation test helps identify changes in your DNA that could affect your health."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
21734-9
Short code
RET gene Mut Tested Bld/T
Synonyms
RET gene Mut Tested Bld/T
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
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 a family history of certain genetic disorders, cancer, or if you’re at higher risk due to ethnicity or lifestyle factors. It can also be part of routine screening for conditions like cystic fibrosis, breast cancer, or heart disease.

How the Test Works

A small blood sample is taken to collect DNA. Specialized lab techniques, including polymerase chain reaction (PCR), amplify and analyze specific DNA sequences to detect mutations.

What to Expect Before the Test

No special preparation is needed, but you may be asked to fast or avoid certain medications for a few hours before your blood draw. Bring any relevant medical records or family history details if requested.

What the Results Mean

Results can be normal (no mutations detected), positive (mutations found), or inconclusive (insufficient data to determine). Follow-up testing or genetic counseling may be recommended based on the findings.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Genetic Mutation Test (Blood)

Frequently asked questions

What does a positive result mean?
A positive result indicates the presence of a known genetic mutation associated with an increased risk of certain conditions. This doesn’t mean you will definitely develop the condition, but it may guide treatment or monitoring plans. Genetic counseling can help explain next steps and risks.
How often should I get this test?
Genetic mutation screening is typically not routine for healthy individuals unless recommended by a healthcare provider for specific risk factors, family history, or preemptive care. Follow-up testing may be needed if mutations are detected.
Can I get this test at home?
Currently, genetic mutation testing for whole blood is usually performed in a clinical lab setting. Some at-home genetic testing kits exist but are not the same as lab-based tests and may not cover the same mutations or be as comprehensive. Always consult your healthcare provider before choosing a test.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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