Ankylosing spondylitis is type of arthritis which mainly affects the spine. This book analyzes the clinical demonstration of Ankylosing Spondylitis (AS) and Spondyloarthritis (SpA). It also discusses Bone Mineral Density, temporomandibular joint, axial fractures and diagnostic and treatment processes. It also serves with updated information on genetics, immune response, HLA-B*27 and relevant subjects. Information regarding non-MHC genes in AS susceptibility and various recent developments in this genre has also been discussed in the book.