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Ganglioside GM2 Serum Concentration (Qualitative)

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

This test measures the presence of GM2 ganglioside in your serum, a complex sugar-lipid molecule that may be linked to certain genetic or metabolic conditions.

Quick summary

["This test helps identify potential genetic disorders affecting lipid metabolism or lysosomal storage diseases."]

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

Key facts at a glance

LOINC
50771-5
Short code
GM2 Gangl IgG/IgM Ser IA-Rto
Synonyms
GM2 Gangl IgG/IgM Ser IA-Rto
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, movement disorders, or neurological issues, especially if a family history of GM2 ganglioside-related disorders exists. It may also be part of a broader evaluation for lysosomal storage diseases or metabolic disorders.

What to Expect Before the Test

No special preparation is needed, but you may need to fast for 8–12 hours before the blood draw if instructed. Bring your lab results and any relevant medical history to your appointment.

How the Test Works

A blood sample is taken from a vein in your arm. The serum is then analyzed using an immunoassay method to detect GM2 ganglioside levels, though results are qualitative (present/absent) rather than quantitative.

What the Results Mean

A positive result (detected GM2 ganglioside) may suggest a lysosomal storage disorder like GM2 gangliosidosis (e.g., Tay-Sachs or Sandhoff disease). Further genetic testing or additional clinical evaluation would follow.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

GM2 Ganglioside Screening (Serum)

Frequently asked questions

GM2 ganglioside is a rare but serious condition that affects how certain cells in the body function, particularly in the brain and nervous system. Early detection can guide treatment options, though there is no cure for these disorders.
If you have a family history of GM2-related diseases or symptoms like muscle weakness, seizures, or developmental regression, this test may be important for early diagnosis.
What does a positive result mean?
A positive result indicates the presence of GM2 ganglioside in your serum, which may point toward a lysosomal storage disorder. Your doctor will discuss next steps, such as genetic testing or referral to a specialist.
Can lifestyle changes help if I have this test?
Currently, there are no standard lifestyle changes to modify GM2 ganglioside levels. Treatment focuses on managing symptoms and supporting affected organs, often under medical supervision.
  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