Oligoarticular arthritis

Oligoarticular arthritis is the most common type of arthritis in young people, affecting four joints or less in the first six months of symptoms. Find out more about the two different types of oligoarticular arthritis.

Key points

Oligoarticular arthritis is the most common type of JIA in children and teens, affecting up to four joints in the first six months of symptoms.
There are two types: oligoarticular-persistent arthritis an oligoarticular-extended arthritis.
Both types have a high risk of eye disease called uveitis.

Oligoarticular (pronounced: oh-lee-go-ar-tik-yoo-lur) arthritis occurs in 50% to 60% of children and teenagers who have JIA. It is the most common type of JIA in children and teenagers. It affects up to four joints in the first six months of symptoms. There are two types of oligoarticular arthritis. These are oligoarticular-persistent arthritis and oligoarticular-extended arthritis.

Identification of the wrist and knee joints on a girl’s body, and illustration of an eye affected by uveitis — Oligoarticular-persistent arthritis affects more females than males. It affects four or fewer joints. There may also be inflammation in the eye, called uveitis.

Quick facts about oligoarticular-persistent arthritis

Oligoarticular-persistent arthritis is generally the mildest form of JIA.
It affects girls more often than boys.
It usually begins before four years of age.
It most often affects the large joints such as the knee, ankle, wrist, and/or elbow joints.
It can be associated with an eye disease called uveitis, which affects up to 20% of young people with this type of JIA.

It is rare to have permanent joint damage with appropriate treatment of this type of JIA. Some young people with this type of JIA go into permanent remission a few years after their symptoms begin. For others, the disease may last into adulthood.

Identification of the wrist, knee, ankle and toe joints on a girl’s body, and illustration of an eye affected by uveitis — Oligoarticular-extended arthritis occurs in females more often than males. It affects both large and small joints asymmetrically. There may be inflammation in the eye, called uveitis.

Quick facts about oligoarticular-extended arthritis

This type of JIA also affects four or fewer joints in the first six months after diagnosis. However, after six months or more, patients with oligoarticular-extended arthritis develop arthritis in five or more joints.

Here are a few facts about oligoarticular-extended arthritis:

Approximately 20% to 30% of patients who start out with oligoarticular arthritis will develop extended arthritis at some point.
Oligoarticular-extended arthritis can affect both large and small joints.

Last updated: January 31st 2017