A disease of the<unk>  is known as an enthesopathy or<unk> is. Enthetic degeneration is characteristic of spondyloarthropathy and other pathologies. The<unk>  is the primary site of disease in ankylosing spondylitis.
Enthesis
Flagging 
Cordance
Co-option 
Foreclosure 
Involution 
Penetrance
Avolition