Sacroiliitis due to seronegative spondyloarthritis

Case contributed by Dr Balint Botz

Presentation

Suspected seronegative spondyloarthritis. Chronic sacral and buttock pain. Sacroiliitis?

Patient Data

Age: 35 years
Gender: Male
  • Marked patchy bone marrow edema around the SI joints with a right-sided dominance best appreciated on the PD FS sequence. 
  • Simultaneous irregularity and sclerosis of the SI joints best seen on the T1 and T2-weighted sequences as low signal areas around the SI joint spaces.
  • Small incidental hemangioma in the S4 vertebral body. 

Case Discussion

Findings are pathognomonic for bilateral, but asymmetric sacroiliitis, which developed as the sequela of seronegative spondyloarthritis

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