Benign Acute Myositis in Children: A Case Series

Area of Science:

• Pediatrics
• Virology
• Musculoskeletal Disorders

Background:

• Benign acute myositis is a rare, transient condition often linked to viral upper respiratory infections.
• Influenza B is a frequently identified viral trigger for this myositis.
• The condition predominantly affects school-aged children, with a notable male predominance.

Observation:

• Patients typically present with symmetrical calf muscle pain, gait disturbances, and functional impairment.
• Elevated creatine phosphokinase levels are a common laboratory finding.
• While generally self-limiting with an excellent prognosis, severe myoglobinuria can occur.

Findings:

• This case series details three pediatric patients diagnosed with viral myositis.
• The study highlights the clinical presentation and diagnostic markers of the condition.
• Emphasis is placed on the recognition of potential complications such as myoglobinuria.

Implications:

• Pediatricians should maintain awareness of benign acute myositis for timely diagnosis.
• Early diagnosis can prevent unnecessary and extensive diagnostic investigations.
• Vigilance for myoglobinuria is essential to avoid potential renal impairment.