Polyarticular Juvenile Idiopathic Arthritis, Rheumatoid Factor Positive

**Semantic type:** Disease or Syndrome

**Definition:** 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.

**Synonyms:** - Polyarticular JIA, RF+ - Polyarticular JIA, RF+ - Polyarticular Juvenile Idiopathic Arthritis, RF+ - Polyarticular Juvenile Idiopathic Arthritis, RF+