PART I Clinical and Technical Aspects.- Clinical Assessment of Spondyloarthritis.- MRI in Spondyloarthritis.- MRI Technique.- MR Imaging in the Follow-up Post Therapy.- PART II Spondyloarthritis: Clinical Cases.- Case 1 Ankylosing Spondylitis Anterior Spondylitis.- Case 2 Ankylosing Spondylitis Anterior Spondylitis.- Case 3 Psoriatic Arthritis Posterior Spondylitis.- Case 4 Undifferentiated Spondyloarthritis Spondylitis in chronic phase.- Case 5 Psoriatic Spondylitis in active and inactive phases Spondylodiscitis.- Case 6 Arthritis associated with inflammatory bowel disease Spondylitis and Sacroiliitis in post-inflammatory phase.- Case 7 Juvenile Spondylitis and Sacroiliitis.- Case 8 Psoriatic Arthritis. Spondylodiscitis.- Case 9 Psoriatic Arthritis Spondylitis and Costovertebral Arthritis.- Case 10 Ankylosing Spondylitis. Spondylodiscitis.- Case 11 Psoriatic Spondyloarthritis Spondylitis Costovertebral Arthritis Sacroiliitis.- Case 12. Psoriatic Arthritis Spondylitis Progression of the disease.- Case 13 Ankylosing Spondylitis Spondylodiscitis and Osteoarthritis.- Case 14 Arthritis associated with inflammatory bowel disease Spondylitis and Sacroiliitis.- Case 15 Undifferentiated Spondylitis in chronic phase Spondylodiscitis.- Case 16 Psoriatic Arthritis Anterior Spondylitis Discitis.- Case 17 Undifferentiated Spondyloarthritis Spondylodiscitis Zygapophyseal Arthritis Spondylitis.- Case 18 Ankylosing Spondylitis Spondylodiscitis Sacroiliitis.- Case 19 Psoriatic Arthritis Costovertebral Arthritis and Sacroiliitis.- Case 20 Psoriatic Arthritis Spondylitis Discitis Costovertebral Arthritis Sacroiliitis Inflammation of ligaments.- Case 21 Ankylosing Spondylitis Spondylodiscitis Sacroiliitis with Synovitis.- Case 22 Ankylosing Spondylitis Sacroiliitis.- Case 23 Ankylosing Spondylitis Discitis Syndesmophytes.- Case 24 Ankylosing Spondylitis Insufficiency fractures.- Case 25 Ankylosing Spondylitis Active inflammatory lesions and Ankylosis.- Case 26 Ankylosing Spondylitis Ankylosis.- Case 27 Psoriatic Arthritis Costovertebral Facet Joints Arthritis.- Case 28 Psoriatic Arthritis Facet Joints Arthritis.- Case 29 Psoriatic Arthritis Facet Joints Arthritis.- Case 30 Psoriatic Arthritis Costovertebral and Facet Joints Arthritis.- Case 31 Ankylosing Spondylitis Costovertebral and Facet Joints Arthritis.- Case 32 Psoriatic Arthritis Costovertebral Arthritis.- Case 33 SAPHO syndrome Spondylitis.- Case 34 Juvenile Idiopathic Arthritis Sacroiliitis.- Case 35 Psoriatic Arthritis Sacroiliitis.- Case 36 Arthritis associated with inflammatory bowel disease Sacroiliitis.- Case 37 Psoriatic Arthritis Sacroiliitis Enthesitis.- Case 38 Psoriatic Arthritis Sacroiliitis.- Case 39 Ankylosing spondylitis Ankylosis of the Sacroiliac Joints.- Case 40 Psoriatic Arthritis Enthesitis.- Case 41 Psoriatic Arthritis Enthesitis.- Case 42 Ankylosing Spondylitis Enthesitis.- Case 43 Ankylosing Spondylitis Enthesitis.- Case 44 Differential Diagnosis Osteochondrosis mimicking Spondylitis.- Case 45 Differential Diagnosis Vertebral instability and Osteochondrosis.- Case 46 Differential Diagnosis Osteochondrosis.- Case 47. Differential Diagnosis Osteochondritis.- Case 48 Differential Diagnosis Infectious Spondylitis.- Case 49 Differential Diagnosis Septic Sacroiliitis.- Case 50 Differential Diagnosis Bone Fracture.- Case 51 Differential Diagnosis Bone Fracture.- Case 52 Differential Diagnosis Osteoid Osteoma.- Case 53 Differential Diagnosis Spondyloarthritis and Metastasis.- Part III Spondyloarthritis Clinical Cases - Post Therapy Follow-up.- Case 54 Psoriatic Arthritis Spondylitis and Sacroiliitis.- Case 55 Ankylosing Spondylitis in acute and chronic phase.- Case 56 Psoriatic Arthritis Sacroiliitis.- Case 57 Ankylosing Spondylitis.- Case 58 Psoriatic Arthritis Sacroiliitis.- Case 59 Ankylosing Spondylitis Sacroiliitis.- Case 60 Ankylosing Spondylitis Spondylodiscitis.- Case 61 Ankylosing Spondylitis and Enthesitis.- Case 62 Psoriatic Arthritis Spondylitis.