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Ganglioside GM2 (Quantitative)

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

This test measures the amount of GM2 ganglioside, a complex sugar-lipid molecule found in certain cells, which can help diagnose or monitor conditions affecting nerve cells.

Quick summary

["GM2 ganglioside levels may indicate nerve damage or storage disorders."]

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

Key facts at a glance

LOINC
63249-7
Short code
GM2 Gangl IgG+IgM Ser Ql IA
Synonyms
GM2 Gangl IgG+IgM Ser Ql IA
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 Is Done

Your doctor may order this test if you have symptoms of a rare genetic disorder called **Tay-Sachs disease** or other conditions linked to GM2 accumulation in nerve cells, such as **Sandhoff disease**. It may also be used in research or specialized diagnostic settings for inherited metabolic disorders.

What to Expect Before the Test

No special preparation is needed. A blood sample is typically drawn from a vein in your arm. If testing is done on cerebrospinal fluid (CSF), you may need to fast or follow specific instructions from your doctor.

How the Test Works

The test involves analyzing a sample of your blood or other bodily fluid (like CSF) to measure GM2 ganglioside levels. Advanced laboratory techniques, such as **immunoassay** or **high-performance liquid chromatography (HPLC)**, are used to detect and quantify the molecule.

Possible Results and Interpretation

Results are compared to reference ranges specific to the lab and testing method. Elevated levels may suggest nerve cell disorders, while normal or low levels may indicate no immediate concern. Consult your doctor for interpretation, as results can vary based on the condition being evaluated.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

GM2 Ganglioside Level

Frequently asked questions

What Are Common Causes of Abnormal Results?
Abnormally high GM2 ganglioside levels are strongly associated with **Tay-Sachs disease** and **Sandhoff disease**, which are inherited metabolic disorders causing progressive nerve damage. Other rare conditions or nerve injuries may also affect these levels, but these are less common. Always discuss results with your healthcare provider.
How Might My Doctor Use This Test?
Your doctor may use this test to confirm a suspected diagnosis of a genetic disorder affecting nerve cells, monitor disease progression, or assess treatment responses in specialized care settings. It is not typically used for routine screening in healthy individuals.
What If My Test Results Are Abnormal?
If your results are abnormal, your doctor will likely order additional tests or consult a genetic counselor or neurologist to further evaluate your condition. Treatment options may vary depending on the underlying disorder, and early diagnosis can improve outcomes.
  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