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High-Field and Low-Field MR Imaging of Superior Glenoid Labral Tears and Associated Tendon Injuries

¹ Department of Diagnostic Imaging, Brown University School of Medicine, Rhode Island Hospital, 593 Eddy St., Providence, RI 02903.
² Department of Orthopaedic Surgery, Brown University School of Medicine, Rhode Island Hospital, Providence, RI 02903.

View larger version (133K): [in a new window]   Fig. 1A. —38-year-old woman with type A superior labrum. High-field coronal oblique proton density-weighted MR image (TR/TE, 2000/20) of right shoulder shows diffuse homogeneous low signal intensity (solid arrow) in fibrocartilaginous superior labrum. Hyaline articular cartilage (open arrow), deep in relation to superior labrum, is linear area of hyperintense signal intensity that parallels osseous glenoid. At arthroscopy (not shown), labrum was found to be normal.

View larger version (15K): [in a new window]   Fig. 1B. —38-year-old woman with type A superior labrum. Drawing shows type A superior labrum pattern.

View larger version (125K): [in a new window]   Fig. 2A. —48-year-old woman with type B superior labrum. Low-field coronal oblique T1-weighted image (TR/TE, 767/26) of left shoulder shows linear area of high signal intensity (arrow) in superior labrum. This labral pattern is commonly seen at and anterior to origin of biceps tendon. At arthroscopy (not shown), superior labrum was found to be normal.

View larger version (24K): [in a new window]   Fig. 2B. —48-year-old woman with type B superior labrum. Drawing shows type B superior labrum pattern.

View larger version (115K): [in a new window]   Fig. 3A. —23-year-old man with type C superior labrum. High-field coronal oblique proton density-weighted image (TR/TE, 2000/40) of left shoulder shows oblique L-shaped focus of hyperintense signal intensity (arrow) that extends through articular side of superior labrum. At shoulder arthroscopy (not shown), type II superior labral anteroposterior tear was seen.

View larger version (19K): [in a new window]   Fig. 3B. —23-year-old man with type C superior labrum. Drawing shows oblique L-shaped pattern of intralabral signal intensity.

View larger version (124K): [in a new window]   Fig. 4A. —30-year-old man with type C superior labrum. High-field coronal oblique proton density-weighted image (TR/TE, 2000/20) of right shoulder shows complex branched pattern of abnormal signal intensity (arrow) that involves large area of superior labrum. At arthroscopy (not shown), type III superior labral anteroposterior tear was shown.

View larger version (13K): [in a new window]   Fig. 4B. —30-year-old man with type C superior labrum. Drawing shows complex branched pattern of intralabral signal intensity.

View larger version (119K): [in a new window]   Fig. 5A. —30-year-old man with type C superior labrum. High-field coronal oblique proton density-weighted image (TR/TE, 2000/20) of right shoulder shows stellate focus of abnormal signal intensity (arrow) in superior labrum. At arthroscopy (not shown), type II superior labral anteroposterior tear was seen.

View larger version (18K): [in a new window]   Fig. 5B. —30-year-old man with type C superior labrum. Drawing shows this pattern of increased intralabral signal intensity.

View larger version (164K): [in a new window]   Fig. 6A. —44-year-old man with type D superior labrum. Low-field coronal oblique T1-weighted image (TR/TE, 650/26) of right shoulder shows globular focus of abnormal signal intensity (arrow) that communicates with bursal side of superior labrum. Type II superior labral anteroposterior tear was found at shoulder arthroscopy (not shown).

View larger version (24K): [in a new window]   Fig. 6B. —44-year-old man with type D superior labrum. Drawing shows globular focus of intralabral signal intensity.

View larger version (155K): [in a new window]   Fig. 7A. —61-year-old man with superior labral anteroposterior (SLAP) tear and long head of biceps tendinopathy (anterior is to reader's left). High-field oblique sagittal T2-weighted image shows coracohumeral ligament (arrowhead).

View larger version (156K): [in a new window]   Fig. 7B. —61-year-old man with superior labral anteroposterior (SLAP) tear and long head of biceps tendinopathy (anterior is to reader's left). Contiguous oblique sagittal image shows focus of increased signal intensity in biceps tendon (arrow) just inferior to coracohumeral ligament (arrowhead).

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