GLOM lesion

Glenoid Labrum Ovoid Mass
Oval shaped lesion seen adjacent to anterior glenoid

Causes:
Torn labral fragment
Loose body
Prominant MGHL
Dislocated biceps tendon

References:
Roan KR et al. Essentials of shoulder MR arthrography: a practical guide for the general radiologist. Clin Rad 59 (2004): 327-334