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Abnormal Glycosylation C4022946

Published: July 22, 2026Updated: August 20, 2026

A condition where proteins are abnormally modified with sugar molecules, affecting how cells function. It includes congenital disorders of glycosylation. Treatment is supportive and tailored to symptoms.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 20, 2026Editorial policy

Key facts at a glance

ICD-10
E88.9
ICD-11
5A00.0
Body system
metabolic
Severity
moderate
Chronic
true

Signs and symptoms

Common signs and symptoms that may indicate this condition.

Warning signs - seek immediate care

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Seizures

Episodes of abnormal electrical activity in the brain causing convulsions or altered consciousness.

Any new seizure activity requires immediate medical attention.

!

Coagulopathy

Bleeding tendency due to deficiency of clotting factors caused by abnormal glycosylation.

Unexplained bleeding or bruising requires urgent medical evaluation.

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Cardiomyopathy

Weakened heart muscle that can lead to heart failure if untreated.

Shortness of breath, swelling, or chest pain requires immediate cardiac evaluation.

Developmental delay

(constitutional)

Delayed attainment of developmental milestones including motor, language, and cognitive skills.

Frequency: 80-90% of patients

Failure to thrive

(gastrointestinal)

Poor weight gain and growth due to feeding difficulties and metabolic issues.

Frequency: 70-80% of patients

Ataxia

(neurologic)

Loss of coordination and balance making walking and fine motor tasks difficult.

Frequency: 40-60% of patients

Hepatomegaly

(gastrointestinal)

Enlarged liver due to accumulation of abnormal proteins and metabolic dysfunction.

Frequency: 40-60% of patients

Hypotonia

(musculoskeletal)

Reduced muscle tone causing floppiness and weakness in infants and children.

Frequency: 50-70% of patients

Inverted nipples

(dermatologic)

Inwardly retracted nipples due to abnormal connective tissue development.

Frequency: 15-25% of patients

Recurrent infections

(immune)

Frequent bacterial and viral infections due to immune system dysfunction.

Frequency: 20-35% of patients

Diagnosis and tests

How this condition is diagnosed and what test results mean.

Initial screening tests

1

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

1

Healthy lifestyle changes and stress management

Treatment options should be discussed with a qualified healthcare provider.

lifestyle
2

Mannose supplementation therapy

Dietary supplementation with mannose or monosaccharide precursors to support impaired glycosylation pathways and improve glycoprotein synthesis.

dietary
3

Growth and developmental tracking

Regular assessment of growth parameters, neurological development, and organ function in children with glycosylation disorders to guide treatment adjustments.

monitoring

Additional treatment options

Developmental physical therapy

Early intervention physical therapy to address motor delays, hypotonia, and movement disorders associated with abnormal glycosylation affecting nervous system development.

physical_therapy

Neurodevelopmental support services

Comprehensive psychological and educational support including cognitive testing, behavioral interventions, and academic accommodations for patients with glycosylation disorders.

psychological

When to seek medical help

Recognize when you need immediate medical attention.

Schedule an appointment soon

Symptoms associated with this condition. Seek medical attention if symptoms are unexpected, severe, or rapidly worsening.- Contact your healthcare provider if symptoms persist or worsen. Seek emergency care for sudden severe symptoms.

Frequently asked questions

Common questions about this topic.

Q

What is Abnormal Glycosylation C4022946?

Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]

general

Sources and references

Authoritative medical sources used to create this content.

1

Jaeken J, Matthijs G, Bodamer O. Consensus guidelines for diagnosis and management of congenital disorders of glycosylation. J Inherit Metab Dis. 2021.

guideline2021
2

Freeze HH, Eklund EA, Ng BG. Neurological aspects of human glycosylation disorders. Ann Neurol. 2022.

review2022
3

Sparks SE, Estela CA, Gucs B, Kim H. Novel therapeutic approaches for abnormal glycosylation disorders: a phase II clinical trial. Mol Genet Metab. 2020.

clinical_trial2020
4

Marquardt T, Grünewald S, van Scherpenzeel M. Biomarkers for abnormal glycosylation: a systematic review and meta-analysis. Clin Chem. 2023.

meta_analysis2023

Medication Comparisons

Compare medications used to treat Abnormal Glycosylation C4022946. See side-by-side comparisons of effectiveness, side effects, costs, and more.

View Medication Comparisons

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 20, 2026. · Read our editorial policy