What is juvenile ankylosing spondylitis?

Also known as: JAS, juvenile spondyloarthritis.

Juvenile ankylosing spondylitis is a form of juvenile idiopathic arthritis that affects children. It specifically impacts areas where ligaments, muscles or tendons are attached to bones, most often affects the lower back.

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Reviewed by: Yonit Sterba Rakovchik, MD

This page was last updated on: 1/29/2019 3:21:13 PM