<unk>  of one or more joints after Group A strep pharyngitis
May represent mild form of rheumatic fever or separate entity
Not associated with other Major Jones criteria; milder illness than rheumatic fever
May represent mild form of rheumatic fever or separate entity
Reactive poststreptococcal arthritis
Acute osteoarthritis
Reactive arthritis
Avascular necrosis
Rheumatoid arthritis
Crystal-induced 
Juvenile idiopathic arthritis
Gonococcal arthritis, arthritis-dermatitis syndrome