Juvenile Idiopathic Arthritis - What Happens
The long-term outlook for this form of JIA is less well known, but some children progress to other conditions such as adult ankylosing spondylitis. This is more common in boys who have hip arthritis or who have HLA-B27.
Psoriatic is the least common form, occurring in fewer than 10% of children with JIA. Children with psoriatic arthritis have a skin condition called psoriasis. In addition to psoriasis, they have arthritis of several joints, or they have at least 2 other features, such as:4
- Problem with the finger or toe nails. This can be pitting of the nails, or separation of the nail from the nail bed (onycholysis).
- Family history of psoriasis in a close relative.
These children can also have inflammatory eye disease.
As with enthesitis-related JIA, the long-term outcome for psoriatic JIA is not well known. Some children continue to have skin and joint symptoms. For a few, the ability to do daily activities can become limited.
Complications associated with JIA
- Inflammatory eye disease, such as
uveitis. Children and adults with this condition can
corneal degeneration (band keratopathy), or vision
- Growth abnormalities, such as unequal leg lengths, an
imbalance in growth of the jaw, and temporary delay in breast
- Joint damage. This is common in the polyarticular form of
JIA and can occur early. About 30% to 50% of children with JIA may have some level of
disability that continues into adulthood.4 Long-term problems can be mild and have little effect on daily activities.
Some children with polyarthritis develop arthritis in the
neck that can cause the neck bones to fuse together.
Complications of systemic JIA include heart or lung problems, such as
pericardial effusion. A rare lung complication is the
formation of scar tissue in the lungs (pulmonary fibrosis).