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. Author manuscript; available in PMC: 2023 Jul 19.
Published in final edited form as: Nat Rev Rheumatol. 2021 Mar 17;17(5):257–269. doi: 10.1038/s41584-021-00590-6

Figure 3. Current arthritis classification in children and adults.

Figure 3.

A. Major diagnostic categories of idiopathic inflammatory arthritis beginning in childhood (before the 16th birthday) according to the ILAR nomenclature. B. Major diagnostic categories of idiopathic inflammatory arthritis beginning in adulthood (age 16 and onward). Adapted from refs 3,16.

Note to illustrator – for PRINTO, the early-onset ANA-positive category includes some seroneg polys, some of each oligo category, and some psoriatics. Other/unclassified includes others in each of these categories plus some psoriatics.