Questions and Answers about Ankylosing Spondylitis By NIAMS —
From nih.gov February 23, 2012 196 1 Ankylosing spondylitis is a
form of progressive arthritis due to chronic inflammation of the
joints in the spine. Its name comes from the Greek words
“ankylos,” meaning stiffening of a joint, and “spondylo,”
meaning vertebra. Spondylitis refers to inflammation of the
spine or one or more of the adjacent structures of the
vertebrae.