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Definition
By Mayo Clinic staffDiffuse idiopathic skeletal hyperostosis (DISH) is calcification or a bony hardening of ligaments in areas where they attach to your spine.
Also known as Forestier disease, diffuse idiopathic skeletal hyperostosis causes stiffness in your upper back, and may also affect your neck and lower back. Some people experience diffuse idiopathic skeletal hyperostosis beyond the spine in areas such as their heels, ankles, knees, hips, shoulders, elbows and hands.
Diffuse idiopathic skeletal hyperostosis often causes no symptoms, though stiffness and pain along affected ligaments can occur. You may not need treatment for diffuse idiopathic skeletal hyperostosis if you don't have symptoms, though physical therapy may help you maintain range of motion in your affected joints.
