Magic angle effect is not uncommon in the wrist tendons, most frequently observed in the flexor pollicis longus tendon as it courses in the distal aspect of the carpal tunnel and in the palm . Magic angle phenomenon has also been reported in the extensor pollicis longus and extensor carpi ulnaris tendons . The absence of additional pathologic features and the presence of high signal on short TE images without signal alteration on other pulse sequences are highly suggestive of magic angle effect.
A minimal amount of physiologic fluid, often seen within the synovial sheaths, may also cause T2 prolongation around the extensor tendons, not indicative of tenosynovitis . Striations and heterogeneous signal maybe noted in the abductor pollicis longus tendon owing to the presence of multiple slips that can simulate longitudinal tears . This appearance can be due to fat interposed between the tendinous fascicles and should not be misinterpreted as a pathologic condition. The positioning of the wrist at the time of MR examination, whether in neutral position, pronation, or supination, will influence the alignment of the extensor carpi ulnaris tendon within its ulnar styloid groove. Pfirrmann and colleagues  noted that the tendon is centered in its groove in the neutral position and pronation, whereas subluxation was seen in supination.
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Everything you wanted to know about. How To Cure Tennis Elbow. Are you an athlete who suffers from tennis elbow? Contrary to popular opinion, most people who suffer from tennis elbow do not even play tennis. They get this condition, which is a torn tendon in the elbow, from the strain of using the same motions with the arm, repeatedly. If you have tennis elbow, you understand how the pain can disrupt your day.