Case contributed by Bahman Rasuli
Diagnosis certain


Pelvic pain for several weeks.

Patient Data

Age: 45 years
Gender: Male

Abnormal subchondral bone marrow signal involving both surfaces of the sacroiliac joint and displays low signal on T1 and high signal on T2WI and fat-suppressed images with enhancement after contrast injection denotes an ongoing acute inflammatory process

Preserved joint space of both ligamentous and synovial parts 

No subchondral sclerosis or cystic changes

Normal shape and signal intensities of the muscle attachments.

Case Discussion

MRI findings are consistent with bilateral acute sacroiliitis.

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