What is juvenile ankylosing spondylitis (AS)?

Updated: Sep 03, 2019
  • Author: Lawrence H Brent, MD; Chief Editor: Herbert S Diamond, MD  more...
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Juvenile AS is clinically similar to adult AS. [76, 77] In approximately 10-20% of all cases, symptom onset occurs before age 16 years. The male-to-female ratio of 3:1 is similar to that of adults.

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