Congenital Myasthenic Syndrome 2c C4225373
A genetic neuromuscular condition causing muscle weakness and fatigue. Treatment focuses on medications that improve nerve-muscle communication and supportive therapy.
Key facts at a glance
- ICD-10
- G43.909
- ICD-11
- 8A00.0
- Body system
- neurologic
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Respiratory insufficiency requiring ventilatory support
Generalized symptoms
(neurologic)Noticeable symptoms that may vary in intensity over time.
Frequency: Common at all stages
Fatigable limb weakness
(neurologic)Ptosis (drooping of eyelids)
(neurologic)Facial weakness
(neurologic)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
Acetylcholinesterase inhibitors
Acetylcholinesterase inhibitors such as pyridostigmine are commonly used as first-line therapy to improve neuromuscular transmission by preventing the breakdown of acetylcholine at the synaptic cleft.
Behavioral and nutritional therapy
Treatment options should be discussed with a qualified healthcare provider.
Fluoxetine
Fluoxetine, a serotonin reuptake inhibitor, has been shown to increase quantum content at the motor endplate and may improve symptoms in certain CMS subtypes with presynaptic defects.
Additional treatment options
Guided exercise therapy
Structured physical therapy focusing on energy conservation techniques and gentle muscle strengthening helps maintain function while preventing overexertion-induced fatigue that is characteristic of CMS.
physical_therapyFatigue management strategies
Implementing pacing strategies, scheduled rest periods, and activity modifications helps minimize symptom exacerbation and optimizes daily functioning for CMS patients.
lifestyleRegular neurological assessments
Ongoing monitoring of respiratory function, muscle strength, and functional status through regular neurological evaluations helps track disease progression and treatment efficacy.
monitoringWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Congenital Myasthenic Syndrome 2c C4225373?
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.
Vincent A, Beeson D, Lang B. European Handbook of Neurological Disorders: Myasthenic Syndromes. Neurology. 2022.
Engel AG, Shen XM, Selig Y, Sine S. Congenital Myasthenic Syndromes: Genetics and Classification. Muscle Nerve. 2021.
Croxen R, Hatton C, Shelley C, et al. Long-term outcome of CMS 2c patients with CHRNE mutations. J Clin Neurol. 2020.
Harper CM, Pitt M. Congenital Myasthenic Syndromes in Infancy. In: Pediatric Neuromuscular Disorders. Cambridge University Press; 2019.
Medication Comparisons
Compare medications used to treat Congenital Myasthenic Syndrome 2c C4225373. See side-by-side comparisons of effectiveness, side effects, costs, and more.
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.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy