Table 3 differential diagnosis of BACM
From: Management and outcome of benign acute childhood myositis in pediatric emergency department
Guillain-Barrè syndrome | Symptoms onset 2–4 weeks after viral illness |
|---|---|
Distal paresthesiaand ascending paralysis | |
Symmetric weakness with absent/decreased/preserved deep tendon reflexes | |
Normal or slightly increased serum CK | |
Dermatomyositis | Subtle onset and chronic course |
Proximal muscle weakness | |
Skin involvement | |
Muscular dystrophy | Muscle weakness |
Chronic persistent increase of CK levels | |
Possible family history of neuromuscular conditions | |
Juvenile Idiopathic arthritis | Asymmetric distribution with swelling and tenderness in joints |
Subacute onset | |
Normal CK levels | |
Transient synovitis of the hip | Symptoms onset 2–3 weeks after viral illness |
Asymmetric pain and limited motion of the hip | |
Normal CK levels | |
Osteomyelitis | Frequent hystory of trauma or penetration of the skin |
Elevation of inflammatory markers | |
Swelling of soft tissues in affected area with or without erythema | |
Myalgia associated to Influenza | Less severe |
Concomitant with viral symptoms | |
Normal CK levels |