Persistent oligoarthritis: Affecting not more than 4 joints throughout the disease course
Extended oligoarthritis: Affecting a total of more than 4 joints after the first 6 months of disease
References
^ abPetty RE, Southwood TR, Manners P, et al. (February 2004). "International League of Associations for Rheumatology classification of juvenile idiopathic arthritis: second revision, Edmonton, 2001". J. Rheumatol. 31 (2): 390–2. PMID14760812.
^Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). Dermatology: 2-Volume Set. St. Louis: Mosby. ISBN978-1-4160-2999-1.