We report the case of a 48-year old patient, with no particular previous history, on follow up for ankylosing spondylitis according to ASAS (Assessment of SpondyloArthritis international Society) criteria since 2012. The patient had inflammatory lower back pain without triggers fever, cough or weight loss. Physical examination showed lumbar stiffness with Schöber index 10+1, fingertip-to-floor distance = 30 cm. X-ray was not contributory. Lumbar MRI objectified Anderson spondylitis at L4-L5. These data were confirmed by lumbar CT scan, which showed spondylolysis at L4-L5 with erosions. Infection or neoplasm were excluded causes of Anderson’s spondylodiscitis. Patient’s outcome was favorable under analgesic, anti-inflammatory treatments and lumbar belt.
Keywords: Anderson's spondylodiscitis; ankylosing spondylitis.