This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other disorders of bone, Subject name: Pediatrics
In systemic form of JIA, all are true EXCEPT: 
Select and explain. 
A. RA factor positive, B. High fever with rash, C. Hepatosplenomegaly, D. Elevated ESR
A: RA factor positive
Answer: A: RA factor positive 
Explanation: RA factor may be positive in polyahritis, but not in systemic onset JIA. Systemic form of JIA: High fever with rash Hepatosplenomegaly Elevated ESR Types of JIA Systemic JIA- Systemic involvement seen Oligoaicular- Affects four or fewer joints, often the knee or ankle. Polyaicular ahritis, rheumatoid factor negative Polyaicular ahritis, rheumatoid factor positive Psoriatic ahritis Enthesitis-related ahritis Undifferentiated ahritis