This document discusses abnormalities of the sacroiliac joint seen on clinical imaging. It provides 8 figures showing examples of abnormalities in the sacroiliac joints caused by conditions such as ankylosing spondylitis, inflammatory bowel disease, osteitis condensans ilii, psoriatic arthritis, reactive arthritis, rheumatoid arthritis, familial Mediterranean fever, and healed tuberculosis. Each figure includes a brief description of the sacroiliac joint abnormalities seen in that specific condition.