Pseudo-widening

Pseudo-widening refers to the apparent increase in joint space on imaging that mimics true widening but results from factors like cartilage loss, joint effusion, or positioning artifacts rather than actual separation of joint surfaces. Recognising pseudo-widening is crucial to avoid misdiagnosing conditions such as joint dislocation or ligament injury. It is commonly seen in early inflammatory arthritis where synovial swelling distorts joint contours.