There are 7 recognized subtypes of JIA, and ‘oligoarticular’ disease refers to children who have 4 or fewer joints affected at diagnosis. Some oligoarticular cases can ‘extend’ after 6 months to involve 5 or more joints while others ‘persist’ as oligoarticular. In terms of treatment, this is tailored to the specific patient situation. NSAIDS (naproxen) and cortisone joint injections are often used initially when few joints are affected. However if this is not sufficient for achieving remission, then a disease modifying anti-rheumatic drug (DMARD) — the most common of which is methotrexate – is typically added.  The treatment may be the same, whether a child has either oligoarticular or  polyarticular disease.