Presentation
Acute onset, non-traumatic low back pain, and difficulty in walking.
Patient Data
Ill-defined STIR hyperintense marrow edema with T1 hypointense bony erosion is noted involving bilateral sacroiliac joints predominately involving the lower third of sacral and iliac surfaces. No joint effusion or bony ankylosis. Findings are suggestive of inflammatory sacroiliitis.
Case Discussion
The patient initially came for a lumbar spine MRI which was normal however screening of the sacroiliac joints revealed changes of sacroiliitis. The previous radiograph was unremarkable. RA factor was negative. The patient was treated symptomatically with NSAIDs and physiotherapy.