<unk>  JIA is characterized by arthritis, fever, which typically is higher than the low-grade fever associated with polyarticular and a salmon pink rash. It accounts for 10-20% of JIA and affects males and females equally, unlike the other two subtypes of JIA, and affects adolescents. It generally involves both large and small joints.<unk>  JIA can be challenging to diagnose because the fever and rash come and go. Fever can occur at the same time every day or twice a day (often in late afternoon or evening) with a spontaneous rapid return to baseline (vs. continuous fever of septic arthritis). The rash often occurs with fever. It is a discrete, salmon-pink macules of different sizes. It migrates to different locations on skin, rarely persisting in one location more than one hour. The rash is commonly seen on trunk and proximal extremities or over pressure areas. Arthritis is often absent in the first weeks or even 6–8 months into the illness.<unk>  JIA may have internal organ involvement such as hepatosplenomegaly, lymphadenopathy, serositis, hepatitis, or tenosynovitis.
Systemic-onset juvenile idiopathic arthritis
Juvenile idiopathic arthritis
Childhood arthritis
Sjögren–Larsson syndrome
Sjögren syndrome
Reactive arthritis
Psoriatic arthritis
CREST syndrome