Evaluate for sacroiliitis, ankylosing spondylitis. There is no evidence of acute fracture or malalignment. Bone marrow signal is within normal limits. No specific findings of sacroiliitis. Bone island noted in the right sacral alar. Intraosseous lipoma is noted in the mid sacrum. No significant degenerative change of the lower lumbar spine. No abnormal enhancing structure is identified.
No MRI evidence of sacroiliitis.