17 Sacroiliac Joint Abnormality

CLINICAL IMAGAGINGAN ATLAS OF DIFFERENTIAL DAIGNOSIS

EISENBERG

DR. Muhammad Bin Zulfiqar PGR-FCPS III SIMS/SHL

• Fig SP 17-1 Ankylosing spondylitis. Bilateral, symmetric obliteration of the sacroiliac joints.

• Fig SP 17-2 Inflammatory bowel disease. Bilateral, symmetric involvement of the sacroiliac joints in a patient with ulcerative colitis.

• Fig SP 17-3 Osteitis condensans ilii. Sharply demarcated sclerosis of the ilia adjacent to the sacroiliac joints. The sacrum is not affected, and the margins of the sacroiliac joints are sharp and without destruction. The sclerosis that overlies the sacral wing is actually in the ilium, where it curves posteriorly behind the sacrum.4

• Fig SP 17-4 Psoriatic arthritis. Bilateral, though somewhat asymmetric, narrowing of the sacroiliac joints.

• Fig SP 17-5 Reactive arthritis. Bilateral, though asymmetric, sclerosis and narrowing of the sacroiliac joints with reactive sclerosis.

• Fig SP 17-6 Rheumatoid arthritis. Bilateral, though asymmetric, sclerosis and narrowing of the sacroiliac joints.

• Fig SP 17-7 Familial Mediterranean fever. Bilateral, though asymmetric, narrowing, erosive changes, and reactive sclerosis about the sacroiliac joints.

• Fig SP 17-8 Healed tuberculosis. Obliteration of the right sacroiliac joint. The left sacroiliac joint remains intact.