20-year-old male with pain and weakness. Evaluate for rotator cuff tear or biceps tendinitis. ROTATOR CUFF: The supraspinatus muscle and tendon appear intact. The infraspinatus muscle and tendon appear intact. The subscapularis muscle and tendon appear intact. There is mild to moderate fatty infiltration of the teres minor muscle. The teres minor tendon appears intact.SUPRASPINATUS OUTLET: There are small cysts within the distal end of clavicle with edema within the underlying bone marrow. There is mild edema within the soft tissue adjacent to the distal clavicle, but the acromioclavicular joint alignment is normal and the bone marrow signal intensity of the acromium is normal. There is trace fluid within the subdeltoid bursa which may not be of any clinical significance.GLENOHUMERAL JOINT AND GLENOID LABRUM: The glenohumeral joint alignment is normal. We see no effusion. Although we see no frank fluid within the superior labrum, there is branching intermediate signal intensity indicating a SLAP tear. This tear appears to extend into the superior aspect of the anterior labrum as well. There is also linear intermediate signal intensity partially traversing the posterior inferior labrum with what appears to be a tiny paralabral cyst.BICEPS TENDON: The tendon of the long head of the biceps appears normal.ADDITIONAL
1. Cyst formation within the distal clavicle with underlying edema could be degenerative in etiology or reflect a stress injury/chronic repetitive trauma (i.e., posttraumatic osteolysis of the distal clavicle).2. SLAP tear with findings suggestive of a nondisplaced posterior inferior labral tear as well.3. Small cysts in the posterior aspect of the humeral head are of questionable current clinical significance, but can be seen in patients with posterosuperior glenoid impingement.4. Mild to moderate fatty atrophy of the teres minor muscle without apparent etiology. The rotator cuff otherwise appears normal as does the biceps tendon.