Osteosclerosis, hyperostosis spondylosis.
Hyperostosis is a term used to describe bones that appear dense on plain radiographs.
Hyperostosis spondylosis is characterized by ankylosing bridges between the anteriolateral aspects of the vertebral bodies, most notably in the thoracic spine. Ossification of spinal ligaments occurs, with invovlement of the posterior longitudinal ligament. This condition is also known as diffuse idiopathic skeletal hyperostosis (DISH) and is notably non-inflammatory. Numerous other syndromes are described with hyperostosis, including the spondyloarthropathies, (such as ankylosing spondylitis, psoriatic arthritis, reactive arthritis), vitamin A intoxication, flurosis, hypoparathyroidism, and the SAPHO syndrome(synovitis, acne, pustolosis, hyperostosis, and osteitis). Sternoclavicular hyperostosis occurs with the SAPHO syndrome, described in young men who develop pain, tenderness and swelling of the sternoclavicular joint....
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