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Acute postinfectious myositis in children typically follows a mild illness, causing calf and thigh muscle pain. Serum creatine phosphokinase levels were elevated but normalized quickly, indicating a usually short recovery period.
Area of Science:
- Pediatrics
- Neurology
- Infectious Diseases
Background:
- Acute postinfectious myositis is a rare condition that can affect children.
- Understanding its presentation and recovery is crucial for pediatric care.
Observation:
- Four children aged 6-9 years presented with acute postinfectious myositis.
- Prodromal symptoms included upper respiratory or gastrointestinal issues, fever, and malaise.
Findings:
- Myalgia primarily affected lower limb muscles (calves, thighs), with less weakness than pain.
- Markedly elevated serum creatine phosphokinase (CPK) levels were observed in all cases.
- Electromyography showed patchy myopathic changes; viral studies were inconclusive.
Implications:
- This condition, while causing significant discomfort, typically resolves within weeks.
- Monitoring CPK levels and muscle pain aids in diagnosis and tracking recovery.
- Further research into viral triggers may improve understanding and management.
Abstract:
Four school children, aged 6 to 9 years, had acute postinfectious myositis. The prodromal illness usually involved the upper respiratory tract, but gastrointestinal symptoms were also seen. Fever and nonspecific malaise were characteristic. After cessation of the illness, myalgia involved the calves and thighs. Arm and neck muscles were less frequently affected. Weakness was less marked than muscle pain. Serum creatine phosphokinase (CPK) was markedly increased in all cases. Myalgia and CPK levels subsided in less than a week, although one child was not back to normal for 4 weeks. Two children had electromyography, and patchy myopathic changes were found. Viral studies were not helpful in any of the cases.