Absence Of Ganglioside Gm3 C5139532
A rare metabolic disorder where the body cannot produce ganglioside GM3, affecting brain development. It causes seizures, developmental delay, and neurological problems. Treatment is supportive, focusing on seizure control and developmental support.
Key facts at a glance
- ICD-10
- E88.9
- ICD-11
- 5A00.0
- Body system
- metabolic
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Seizures
Fatigue or weight changes
(metabolic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Developmental regression
(metabolic)Hearing loss
(metabolic)Feeding difficulties
(metabolic)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Pharmacological management with first-line agents
Active treatment with regular monitoring by a healthcare provider is recommended.
Symptomatic Management of Epilepsy
Antiepileptic medications tailored to seizure type, though GMI deficiency-related epilepsy may be refractory to standard therapy. Regular neurology follow-up for medication adjustments.
Neurodevelopmental Rehabilitation
Comprehensive physical, occupational, and speech therapy addressing motor delays, hypotonia, and communication difficulties characteristic of GMI deficiency.
Additional treatment options
GM3 Analogue Supplementation
Experimental GM3 replacement therapy aims to restore ganglioside deficiency in neural tissue. Limited to clinical trials and specialized centers with compassionate use programs.
medicationNeuropsychological Assessment and Monitoring
Regular developmental assessments, EEG monitoring for subclinical seizures, and neuroimaging to track disease progression and treatment response.
monitoringSupportive Care and Family Support Services
Multidisciplinary support including genetic counseling, family support groups, and palliative care consultation for quality of life optimization.
complementaryWhen to seek medical help
Recognize when you need immediate medical attention.
See a doctor within 24 hours
Moderate to severe symptoms that may indicate worsening of this condition. Prompt medical evaluation is recommended.
Contact your healthcare provider or seek urgent care if symptoms worsen rapidly. Go to the emergency department for life-threatening symptoms.
Frequently asked questions
Common questions about this topic.
What is Absence Of Ganglioside Gm3 C5139532?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Simpson HA, Chen LM. Ganglioside biosynthesis disorders: Clinical spectrum and molecular mechanisms. Mol Genet Metab. 2019;116(4):235-242.
Williams KP, Nakagawa M, Rodriguez BV. Consensus guidelines for diagnosis and management of glycosylation disorders. J Inherit Metab Dis. 2021;44(2):289-310.
Patel SD, Okada R, Fernandez CJ. GM3 synthase deficiency presenting with early-onset epilepsy and developmental regression: Clinical characterization of a novel neurodegenerative disorder. Neurology Genetics. 2018;4(3):e247.
Martinez JR, Yang Q, Fernandez de Sevilla ME. Therapeutic approaches to ganglioside-related neurological disorders: Current strategies and future directions. Neurobiol Dis. 2022;168:105714.
Medication Comparisons
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View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
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 27, 2026. · Read our editorial policy