rheumatoid factor-negative juvenile idiopathic arthritis
Rheumatoid factor-negative polyarthritis is a term used to describe a group of poorly defined heterogenous conditions that incorporates forms of rheumatoid factor-negative polyarthritis and forms of oligoarticular arthritis that become extensive in less than 6 months after onset.
MONDO:0018456
polyarticular juvenile idiopathic arthritis
is_a
juvenile rheumatoid factor-negative polyarthritis
exact
polyarthritis without rheumatoid factor
exact
rheumatoid factor-negative JIA
exact