Correlation of computed arthrotomography with arthroscopy of the glenohumeral joint.

We report our experience with CT-arthrotomography, compared to the arthroscopic findings in a group of 54 non-selected patients with a shoulder problem. Thirty-one patients had a CAT-scan of the shoulder and subsequently underwent a videotaped arthroscopy of the shoulder. Five out of the 10 negative CAT-patients were positive on arthroscopy for impingement syndrome. Arthroscopy picked up 5 partial thickness rotator cuff tears, not seen on CAT. Arthroscopy was also very helpful in diagnosing synovitis. For biceps problems, loose bodies, labrum tears and adhesive capsulitis, the sensitivity and accuracy figures were very high, comparing CAT-scan and arthroscopy. A shoulder with a history of instability or a painful clicking shoulder seems to be the best indication for CAT-scanning.