polyarticular juvenile idiopathic arthritis rheumatoid factor-positive polyarticular juvenile idiopathic arthritis https://www.malacards.org/card/rheumatoid_factor_positive_polyarticular_juvenile_idiopathic_arthritis NANDO:2201058 polyarticular juvenile idiopathic arthritis, rheumatoid Factor Positive rheumatoid factor-positive polyarticular JIA polyarticular JIA, RF+ MEDGEN:855737 MONDO:0019435 NCIT:C119034 UMLS:C3890733 polyarthritis with rheumatoid factor juvenile idiopathic rheumatoid factor-positive polyarthritis GARD:0019064 polyarticular juvenile idiopathic arthritis, RF+ EFO:0009731 Orphanet:85435 A category of juvenile idiopathic arthritis defined by the presence of arthritis affecting five or more separate joints during the first six months of disease, with positive serologic testing for rheumatoid factor.