G72.8

Clinical Causes: Genetic mutations affecting muscle structure or function Drug-induced muscle toxicity, such as from statins or corticosteroids Metabolic disorders impacting muscle energy production Inflammatory or autoimmune processes targeting muscle tissue Toxic exposures to environmental or occupational substances Underlying systemic diseases like hypothyroidism or diabetes Vitamin deficiencies, particularly vitamin D or B12 Idiopathic origins where no specific cause is identified

Key Symptoms: Progressive muscle weakness, often symmetrical Muscle cramps or stiffness Difficulty with activities involving movement, such as walking or lifting Muscle fatigue after exertion Muscle pain or tenderness Potential involvement of respiratory or cardiac muscles in severe cases Muscle wasting over time

Diagnosis Path: Electromyography (EMG) to assess muscle electrical activity Muscle biopsy to examine tissue for structural changes or inflammation Blood tests measuring muscle enzymes like creatine kinase (CK) Genetic testing when hereditary causes are suspected Imaging studies like MRI to visualize muscle tissue Serological tests for autoimmune markers if an autoimmune myopathy is suspected

Treatment Protocols: Physical therapy to maintain muscle strength and flexibility Medications such as corticosteroids or immunosuppressants for inflammatory cases Discontinuing or substituting causative drugs Addressing nutritional deficiencies through supplementation Managing underlying systemic conditions Supportive care, including assistive devices or mobility aids Monitoring and treating complications involving respiratory or cardiac muscles