64-year-old male with concern for reactive arthritis. Evaluate for sacroiliitis. BONE MARROW: There is evidence of marrow replacement.SOFT TISSUES: The soft tissues, including the pelvic musculature appears normal. JOINTS: The sacroiliac joints appear normal and symmetric bilaterally with no evidence of narrowing, ankylosis or subchondral erosions. The hip joints appear normal bilaterally.ADDITIONAL
No MRI findings suggest sacroiliitis.