ankylosing spondylitis definition and impotence
1 Ankylosing spondylitis is a type of arthritis. 2  It mostly affects the lower part of the spine, and where it joins to the hip. 3  An inflammatory disease, ankylosing spondylitis is characterized by pain and stiffness and can lead to loss of mobility.ere are some key points about ankylosing spondylitis. More detail and supporting information is in the body of this article. 1  Ankylosing spondylitis is a type of arthritis. 2  It mostly affects the lower part of the spine, and where it joins to the hip.