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[Myopathy and hypothyroidism]
Insights
Hypothyroid children experience muscle weakness, hypotonicity, and enzyme level changes. These muscular disturbances are reversible with thyroglobulin therapy, showing no long-term impact on patient prognosis.
Area of Science:
- Pediatric Endocrinology
- Neuromuscular Disorders
- Metabolic Myopathies
Context:
- Hypothyroidism in children can lead to significant neuromuscular manifestations.
- Understanding these muscular disturbances is crucial for accurate diagnosis and management.
- Thyroid hormone deficiency affects muscle structure and function.
Purpose:
- To detail the spectrum of muscular disturbances observed in hypothyroid children.
- To investigate the reversibility of these muscular changes with treatment.
- To assess the impact of these disturbances on the overall prognosis of pediatric hypothyroidism.
Summary:
- Hypothyroid children present with generalized proximal muscle weakness, hypotonicity, pseudohypertrophy, and delayed reflex relaxation.
- Elevated muscle enzymes (creatine phosphokinase and aldolase) and non-specific electromyographic findings are common.
- Histopathological examination reveals a decrease in type II muscle fibers.
Impact:
- Thyroglobulin therapy effectively reverses muscular disturbances in hypothyroid children.
- These reversible neuromuscular changes do not negatively influence the long-term prognosis.
- Early diagnosis and treatment are key to resolving muscle-related symptoms in pediatric hypothyroidism.
Abstract:
Muscular disturbances in hypothyroid children are: generalized muscular weakness of proximal predominance, muscular hypotonicity, pseudohypertrophy (of gastrocnemius muscles chiefly), slow relaxation stage of osteotendinous reflexes, rise of muscular enzymes (CPK andaldolase), unspecific electromyographic changes and histopathologic disturbances comprised by persistent decrease of fibers type II. All these changes are reversible with thyroglobulin therapy; therefore they exert no influence on the prognosis of hypothyroid patients.