Diffuse Idiopathic Skeletal Hyperostosis | Arthritis Foundation

Diffuse idiopathic skeletal hyperostosis (DISH) is a type of arthritis that affects tendons and ligaments, mainly around your spine. These bands of tissue can become hardened (calcified) and form growths called bone spurs where they connect to your bones. DISH can also cause bone spurs in your hips, knees, shoulders, feet and hands and harden bones throughout your body. 

DISH, sometimes called Forestier disease, often doesn’t cause symptoms and is usually found when you have an imaging test for another problem. Some people have pain and stiffness in their  back that may get worse over time.