The sacroiliac (SI) joint is a complex anatomical region that make it one of the more challenging joints to image. This articulation has several interesting features. Despite being the largest joint in the axial skeleton and supportting the weight of the entire torso, it is usually the earliest joint being affected in patients with spondyloarthritis. Thereby, many pathologies can affect the sacroiliac joint, some of which have specific characteristics, while others are confusing. We will be interested in this work particularly to inflammatory and degenerative...

Retrospective study spread over a period of 2 years, (2016-2018), involving 168 files compiled at the Department of Radiology, Ar-razi Hospital, Mohammed VI University Hospital of Marrakech. 130 patients benefited from an MRI of the sacroiliac joint, 12 patients were explored by CT scan and 32 patients received an MRI of sacroiliac joint supplemented by a CT scan. The CT scan was performed by spiral acquisition with thin slices in coronal and axial planes. The magnetic resonance imaging was performed in sequences: - T1 in...

The average age of our patients was 41 years old with a female predominance (Fi. 1). The clinical symptomatology was dominated by unilateral or bilateral fessialgia isolated or associated with lower back pain. We found 112 cases of inflammatory sacroiliitis, of which 86 were related to ankylosing spondylitis, 15 cases of spondyloarthropathies associated with chronic inflammatory bowels diseases and 11 in relation with psoriatic arthritis. Degenerative SI involvement was found in 56 patients (Fig 2 and 3).

The degenerative and inflammatory disease are the main etiology of sacroiliac joint. They have a common clinical and radiological signs, making their distinction difficult. Conventional radiography is the first-line examination of any symptomatology affecting the sacroiliac joint. however, it remains insufficient and only visualizes structural lesions already established at a late stage of the disease, including erosions, hyperostosis and ankylosis. MRI allows the diagnosis of spondyloarthropathy at an early stage, when only inflammatory lesions are visible namely medullary edema. In 2009, the assessement in spondyloarthritis...

Michael J. Tuite, M.D. Sacroiliac Joint Imaging. Department of Radiology, Division of Musculoskeletal Radiology, University of Wisconsin Hospital and Medical School, Madison, Wisconsin. Thieme Medical Publishers, Inc., 333 Seventh Avenue, New York, NY 10001, USA. DOI 10.1055/s-2008-1067939. ISSN 1089-7860. Malghem J and al Principles of analysis for sacroiliac joints imaging. JBR-BTR.2007 Sep-Oct;90(5):358-67. PMID: 18085190. Braliakos X. magingin Axial Spondyloarthritis. Isr Med Assoc J.2017 Nov;19(11):712-718. PMID: 29185288 Donald Resnick and al. Comparaison of radiographic abnormalities of the sacroiliac joint in degenerative disease and ankylosing spondylitis. Department...