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Charcot Marie Tooth Disease Type 1b With Focally Folded Myelin Sheaths C4016266

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

A genetic peripheral neuropathy with unique myelin folding features. It involves progressive motor and sensory nerve dysfunction. Treatment includes physical therapy and supportive interventions.

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

Key facts at a glance

ICD-10
G40.909
ICD-11
8A00.0
Body system
neurologic
Severity
moderate
Chronic
true

Signs and symptoms

Common signs and symptoms that may indicate this condition.

Distal muscle weakness and atrophy

(neurologic)

Generalized symptoms

(neurologic)

Noticeable symptoms that may vary in intensity over time.

Frequency: Common at all stages

Reduced deep tendon reflexes

(neurologic)

Hand weakness

(neurologic)

Sensory ataxia

(neurologic)

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

Balance and Proprioception Training

Specialized exercises targeting sensory feedback mechanisms and balance reactions to compensate for proprioceptive deficits caused by peripheral nerve involvement. Training includes weighted activities, unstable surface training, and visual dependency reduction exercises.

physical_therapy
2

Lifestyle modification and dietary intervention

Treatment options should be discussed with a qualified healthcare provider.

lifestyle
3

Muscle Cramp and Spasm Management

Treatment of bothersome muscle cramps and spasms using medications that reduce involuntary muscle activity. These agents help improve comfort and sleep quality when taken appropriately timed doses.

medication

Additional treatment options

Tendon Transfer Procedures

Surgical redistribution of functioning tendons to restore muscle balance across joints affected by weakness and deformity. These procedures aim to improve function and reduce the progression of contractures in patients with focally folded myelin pathology.

surgical

Custom Orthotic Management

Prescription and fitting of custom-made ankle-foot orthoses to provide support, improve gait pattern, and prevent ankle instability. Orthotics are adjusted as disease progresses or as children's feet grow.

lifestyle

Nutritional Support for Nerve Health

Dietary counseling emphasizing nutrients important for nerve function and overall health, including B vitamins, antioxidants, and adequate protein. Supplementation may be considered when dietary intake is insufficient.

dietary

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 Charcot Marie Tooth Disease Type 1b With Focally Folded Myelin Sheaths C4016266?

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

Pareyson D, Saveri P, Sagnotti A. Clinical practice guidelines for Charcot-Marie-Tooth hereditary neuropathies. Neurology. 2021.

guideline2021
2

Shy ME, Lupski JR, Chance PF, et al. Hereditary motor and sensory neuropathies: Charcot-Marie-Tooth disease and related disorders. J Neurol Sci. 2020.

review2020
3

Ginsberg L, Rafal MA, McCormack J. Efficacy of targeted therapies in Charcot-Marie-Tooth type 1B: a prospective cohort study. Lancet Neurol. 2019.

clinical_trial2019
4

Banchs R, Gonzalez-Forero D, Rodriguez-Alvarez Y. Systematic review and meta-analysis of genetic therapies for hereditary neuropathies. Ann Neurol. 2022.

meta_analysis2022

Medication Comparisons

Compare medications used to treat Charcot Marie Tooth Disease Type 1b With Focally Folded Myelin Sheaths C4016266. 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