Myopathy Congenital With Fiber Type Disproportion X Linked C2749128
An X-linked inherited muscle disorder causing severe weakness and low muscle tone from birth. It primarily affects males. Care includes respiratory support, physical therapy, and monitoring.
Key facts at a glance
- ICD-10
- Q79.9
- ICD-11
- LA00.0
- Body system
- musculoskeletal
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Respiratory distress at birth
Joint pain or stiffness
(musculoskeletal)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Generalized muscle weakness
(musculoskeletal)Hypotonia (low muscle tone)
(musculoskeletal)Facial weakness
(musculoskeletal)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
Early intervention physiotherapy program
Intensive physical therapy focusing on gentle range of motion exercises, positioning, and muscle strengthening to maintain function and prevent contractures. Therapy should be tailored to the individual's abilities and disease progression.
Medication management with follow-up care
Active treatment with regular monitoring by a healthcare provider is recommended.
Respiratory function surveillance
Regular monitoring of pulmonary function including vital capacity, nocturnal oximetry, and cough efficacy testing to detect and manage respiratory muscle weakness early.
Additional treatment options
Orthopedic intervention for contractures
Surgical release of severe contractures and tendon lengthening procedures when conservative measures fail to maintain mobility and functional positioning.
surgicalAdaptive equipment and home modifications
Implementation of assistive devices such as braces, walkers, wheelchairs, and home accessibility modifications to maximize independence and safety.
lifestyleGentle aquatic therapy
Water-based exercises in warm pools provide resistance while reducing joint stress, improving strength and circulation with minimal impact on muscles.
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 Myopathy Congenital With Fiber Type Disproportion X Linked C2749128?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalMedication Comparisons
Compare medications used to treat Myopathy Congenital With Fiber Type Disproportion X Linked C2749128. 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.
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