Also called valgus extension overload syndrome
This is not the same as posterolateral rotatory instability…
… Which is due to a tear of the lateral ulnar collateral ligament
Posterolateral impingement refers to impingement between the olecranon articular surface on the lateral side and the opposing capitellar surface
Said to be the result of abnormal olecranon lateral movement
Itself secondary to ligament laxity from previous trauma
The imaging signs are often subtle
Chondromalacia may be difficult to see
Diagnosis becomes a little easier when there is subchondral bone oedema.
A secondary synovitis and marginal osteophyte formation around the articulation are also important findings
