53-year-old male with new brain tumor, questionable metastases versus primary brain tumor with increased FDG uptake in the right shoulder on recent PET examination. ROTATOR CUFF: The supraspinatus and infraspinatus muscles and tendons appear normal for age. The subscapularis and teres minor muscles and tendons appear intact. There is a fusiform, near fluid signal intensity, small mass within the teres minor muscle, measuring approximately 1.5 cm in the long axis and 7 mm in the short axis. There is no enhancement of this mass on post gadolinium images and we suspect that this represents an intramuscular ganglion or less likely a benign nerve sheath tumor. It does not correspond to the morphology of the increased uptake seen on the patient's recent PET/CT examination.SUPRASPINATUS OUTLET: There is a trace amount of fluid within the subacromial bursa which may not be of any clinical significance. The acromioclavicular joint appears normal for age.GLENOHUMERAL JOINT AND GLENOID LABRUM: There is mild enhancement of the glenohumeral joint indicating a mild synovitis that corresponds to the increased uptake seen on recent PET/CT examination. The glenohumeral joint alignment is within normal limits. There is intermediate signal intensity within the posterior superior labrum suggesting degeneration, but we see no fluid-filled tear.BICEPS TENDON: There is mild circumferential enhancement of the tendon sheath of the long head of the biceps tendon representing a tenosynovitis, perhaps an extension of synovitis from the glenohumeral joint. ADDITIONAL
1. Mild synovitis of the glenohumeral joint with extension of the synovitis along the tendon of the long head of the biceps which corresponds in morphology to the increased uptake seen on recent PET/CT examination.2. Small nonenhancing mass in the teres minor muscle likely represents a ganglion or less likely a benign nerve sheath tumor.3. No findings to suggest metastatic disease or a primary tumor of bone.