26-year-old male patient with lower back pain. Evaluate for sacroiliitis/ankylosing spondylitis. We see no enhancement of the sacroiliac joints to suggest sacroiliitis. There is minimal edema-type signal along the lateral aspect of the lower right sacrum, which is nonspecific and could be degenerative rather than inflammatory in etiology. We see no definite erosions or ankylosis. Otherwise, the bone marrow signal intensity is normal.
Minimal edema in the lateral aspect of the lower right sacrum is nonspecific. We see no enhancement of the sacroiliac joints to confirm sacroiliitis. 