What test indicates a potential issue if a dimple appears inferior to the acromion?

The presence of a dimple appearing inferior to the acromion during testing is indicative of a potential issue with the shoulder's stability, specifically related to glenohumeral instability or a superior labral tear. The Sulcus Sign test is designed to assess for inferior shoulder instability. When a downward traction force is applied to the arm, a dimple or sulcus may appear beneath the acromion if there is laxity in the shoulder joint, suggesting that the humeral head is not well-centered within the glenoid cavity.

This test is particularly significant because it provides visual evidence of possible instability, which can be essential in diagnosing conditions that require further evaluation or intervention. In contrast, the other tests mentioned focus on different aspects: Speed's Test assesses for biceps tendon pathology, Yergason's Test evaluates the stability of the biceps tendon, and the AF-ROM Test (Active Functional Range of Motion) measures the functional range of movement but does not specifically target glenohumeral joint stability. Therefore, identifying a dimple with the Sulcus Sign directly indicates issues related to instability rather than other shoulder conditions.