DISH 

Background 

• Diffuse idiopathic skeletal hyperostosis 
• Thoracic 
• Right side (due to Aorta) 

Dx Criteria 

• Flowing ossification Anterolateral of 4 vert 
• Preseve dis height 
• No facet or SI akylosis 

Findings 

• Cevical 
  • Dysphagia, difficult intubation 
  • OPLL myelopathy 
• Lumbar 
  • Stenosis – flavum, hyperostosis 
• Fracture 
  • Simialr to AS – long level arm 
• Enthesophyte 
• Increase HO afte THTA