The combination of mechanism of injury, clinical signs and symptoms, as well as a positive labral test will help identify a labral concern.
Although the patellofemoral joint is not a true articulation, is serves a very important purpose. As the largest sesamoid bone in the body, it forms the least congruent joint in the body.
A study by Maranhao, Maranhao-Filho, Lima, and Vincent (2010) studied 13 tests for their ability to detect subtle motor deficits to identify possible unilateral/monohemispheric brain tumors. The results of this study were very interested and provide simple tests with respectable metrics for simple screening of a potentially serious concern.