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Ganglioside GM2 (Serum) Quantitative Measurement

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

This test measures the amount of GM2 ganglioside, a complex sugar-lipid molecule found in your blood serum. GM2 is linked to certain genetic conditions affecting nerve cells.

Quick summary

["Understanding your GM2 levels may help identify rare inherited disorders that impact nerve function."]

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

Key facts at a glance

LOINC
88731-5
Short code
GM2 Gangl IgG+IgM Ser IA-aCnc
Synonyms
GM2 Gangl IgG+IgM Ser IA-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
CPT
82784
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

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like developmental delays, muscle weakness, or neurological issues. It’s often part of a broader evaluation for conditions like Tay-Sachs disease or other lysosomal storage disorders.

What to Expect During the Test

A blood sample will be drawn from a vein in your arm. The serum portion is separated and analyzed to measure GM2 levels. Results are typically available within a few days.

What the Results Mean

Elevated levels may suggest certain genetic disorders, while normal levels help rule out these conditions. Interpretation depends on clinical context and family history.

Common Conditions Linked to GM2 Testing

This test is primarily used for diagnosing or monitoring rare genetic disorders affecting nerve cells, such as GM2 gangliosidosis variants (e.g., Sandhoff disease).

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical significance: GM2 ganglioside levels are critical for diagnosing lysosomal storage disorders, which can cause progressive neurological damage. Elevated levels often correlate with disease activity and may guide treatment decisions or disease management strategies.

Short name

GM2 Ganglioside Level

Frequently asked questions

What causes abnormal GM2 levels?
Abnormal GM2 levels are most commonly associated with inherited genetic disorders that impair the body’s ability to break down GM2. These conditions often run in families and may cause symptoms starting in infancy or early childhood.
How is this test different from other blood tests?
Unlike standard blood tests (e.g., glucose, cholesterol), this test specifically measures GM2 ganglioside concentration in serum. It requires specialized laboratory techniques to detect this rare molecule accurately.
Can diet or lifestyle affect GM2 levels?
Diet or lifestyle factors typically do not influence GM2 levels in this test. Results are primarily based on genetic and metabolic factors related to GM2 breakdown.
  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