Miyoshi Muscular Dystrophy 1 C4551973
A form of muscular dystrophy primarily affecting distal muscles in the legs. Symptoms typically begin in adolescence or young adulthood, with management including physical therapy and supportive care.
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.
distal muscle weakness in lower legs
(musculoskeletal)Joint pain or stiffness
(musculoskeletal)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
calf muscle atrophy
(musculoskeletal)difficulty walking on heels
(musculoskeletal)proximal muscle involvement
(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
Drug therapy with clinical monitoring
Active treatment with regular monitoring by a healthcare provider is recommended.
Lower extremity rehabilitation program
Intensive physical therapy focusing on gait training, balance exercises, and muscle strengthening to maintain ambulation and slow progressive weakness in lower limbs.
Cardiac and respiratory surveillance
Regular cardiac monitoring with echocardiograms and pulmonary function tests to detect cardiomyopathy and respiratory muscle involvement common in Miyoshi dystrophy.
Additional treatment options
Tendon release procedures
Surgical interventions to release Achilles tendon contractures and improve ankle mobility when conservative measures fail to maintain functional range of motion.
surgicalActivity modification and assistive devices
Implementation of appropriate assistive devices such as ankle-foot orthotics, canes, or walkers to maintain independence and prevent falls during disease progression.
lifestylePsychological support and counseling
Mental health support including counseling and coping strategies to address the emotional impact of progressive muscle disease and maintain quality of life.
psychologicalWhen 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 Miyoshi Muscular Dystrophy 1 C4551973?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy