Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Medical Dictionary

ankylosing spondylitis

noun

Medical Definition of ankylosing spondylitis

  1. :  a chronic inflammatory disease that affects the spine and sacroiliac joints and often other joints (as of the shoulder) and that is marked by pain and stiffness Ankylosing spondylitis is more common in males, with symptoms typically appearing during the late teens through the early forties. In some cases bones may fuse and cause parts of the spine to become inflexible. <Although the disease has a predilection for the axial skeleton, the peripheral joints are commonly affected; in patients with long-standing ankylosing spondylitis, the shoulders are involved in approximately 33 percent of cases.—Medical Radiography & Photography, 1982> <Although ankylosing spondylitis has been considered a relatively benign form of arthritis, a recent study showed that the rates of pain and disability among patients with ankylosing spondylitis were similar to the rates among those with rheumatoid arthritis.—Jennifer D. Gorman, The New England Journal of Medicine, 2 May 2002>—called also ,




Seen and Heard

What made you want to look up ankylosing spondylitis? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

immature or lacking adult sophistication

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

angry oily prompt maudlin
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ