Background Ankylosing Spondylitis is a rare chronic inflammatory autoimmune disorder affecting primarily sacroiliac joint and axial skeletal. Affecting males more than females with a ratio of 2:1. It is one of the diseases among Spondyloarthropathies, others include * Psoriatic Arthritis * Reactive Arthritis * Enteropathic Arthritis * Undifferentiated Spondyloarthropathies. There is another form of Ankylosing Spondylitis that is juvenile Ankylosing Spondylitis affecting children under 16 years of age. Clinical Presentation Morning Stiffness lasting more than 30 minutes. Insidious onset pain. onset in early age, before 40. Peripheral  Enthesitis and Arthritis. organ-specific extra-articular manifestation […]