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Cytogenetic Analysis for Single-Nucleotide Variants (SNVs) in Blood

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

This test examines genetic variations (SNVs) in your blood cells to identify specific changes in your DNA sequence. It may be used to detect inherited or acquired genetic differences that could influence health risks or guide treatment planning.

Quick summary

["This test helps assess genetic factors that may affect your health or treatment options."]

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

Key facts at a glance

LOINC
55603-5
Short code
Cyto Snv
Synonyms
Cyto Snv
Category
chemistry
Sample
fluid
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
cyto-stain
Specimen volume
2-5 mL
Stability
Room temperature: 2h, Refrigerated: 24h
Hemolysis max
300
TAT
4–24 hours
Order
routine

What This Test Measures

The test looks for single-nucleotide variants (SNVs) in your blood cells. SNVs are small changes in a single DNA building block (nucleotide) that can occur naturally or be inherited. These variants may be associated with certain genetic conditions, drug responses, or disease risks.

Why It Might Be Ordered

Your healthcare provider may recommend this test if you have a family history of genetic disorders, are considering genetic counseling, or if certain symptoms or lab results suggest a genetic component. It can also be used in research or for precision medicine approaches.

Sample Collection and Preparation

A blood sample is typically drawn from a vein in your arm. The blood is processed to isolate DNA from your white blood cells. This DNA is then analyzed for specific SNVs using advanced genetic testing methods.

How Results Are Interpreted

Results are compared to reference genetic data to identify any SNVs that may be of clinical interest. These findings are reviewed by a healthcare provider or genetic counselor to determine their potential significance.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

SNVs can influence how your body functions at a genetic level. Some may be harmless variants found in many people, while others could be linked to increased risk for certain diseases, altered drug responses, or inherited conditions. This test helps identify which variants may need further evaluation or monitoring.

Short name

Cytosnv Test

Frequently asked questions

What does a positive result mean?
A positive result indicates the presence of specific SNVs in your DNA. These variants may or may not affect your health directly, depending on their type and location. Your healthcare provider will discuss the potential implications with you, including whether they are known to cause conditions or influence treatment options.
How long does it take to get results?
Test results typically take several weeks to a few months to process, depending on the complexity of the genetic analysis and laboratory workflow. Your provider will contact you once results are available.
Are there any risks or side effects from this test?
The blood draw for this test involves a small needle inserted into your arm, which may cause mild discomfort or bruising. There are no known genetic risks associated with this specific test, as it only examines DNA variations already present in your cells.
  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