MR imaging appearance of 180-360 degrees labral tears of the shoulder.

Glenoid labral tears exceeding 180 degrees are an uncommon entity in which characteristic clinical and MR imaging features can lead to a more accurate preoperative diagnosis. We provide a description of glenoid labral tears that exceed 180 degrees, and their characteristic magnetic resonance imaging features. In the young, heavily muscled male athlete, the identification of multiple sites of labral pathology and isolated, extensive posterior labral injuries are features that should raise suspicion for labral tears that exceed 180 degrees.