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diffuse idiopathic skeletal hyperostosis

n.
  1. A generalized spinal and extraspinal articular disorder characterized by calcification and ossification of ligaments, particularly of the anterior longitudinal ligament.ankylosing hyperostosis Forrestier's disease hyperostotic spondylosis
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.