Jung-Ah Choi MD, Presenter: Nothing to Disclose

In Sook Lee MD, Abstract Co-Author: Nothing to Disclose

Joon Woo Lee, Abstract Co-Author: Nothing to Disclose

Kyu-Sung Kwack, Abstract Co-Author: Nothing to Disclose

Jong Won Kwon MD, Abstract Co-Author: Nothing to Disclose

Heung Sik Kang, Abstract Co-Author: Nothing to Disclose

Ju Han Oh MD, Abstract Co-Author: Nothing to Disclose

et al, Abstract Co-Author: Nothing to Disclose

To determine the usefulness of CT arthrography using 16 slice MDCT in evaluation of labral and rotator cuff lesions of the shoulder by comparing with direct MR arthrography and arthroscopy.

CT arthrography using 16 slice multidetector CT was performed in 120 patients. 41 patients underwent arthroscopy. 11 cases underwent direct MR arthrography as well. Prospective analysis of findings on CT arthrography and direct MR arthrography was done with evaluation of the following: Bankart lesions, Hills-Sachs defects, presence and type of SLAP lesions, presence and extent of rotator cuff lesions. Findings were compared with those on direct MR arthrography and correlated with arthroscopic findings. Sensitivity and specificity were determined for detection of each finding. Accuracy was determined for type of SLAP lesions.

CT arthrography showed 94% sensitivity and 100% specificity in detecting Bankart lesions, 100% sensitivity and 100% specificity in Hills-Sachs defects, 80% sensitivity and 88% specificity in SLAP lesions (71% accuracy in type I, 95% accuracy in type II), 100% sensitivity and 100% specificity in full thickness rotator cuff tears, and 73% sensitivity and 95% specificity in depicting partial thickness rotator cuff tears. Direct MR arthrography showed 94% sensitivity and 100% specificity in detecting Bankart lesions, 94% sensitivity and 100% specificity in Hills-Sachs defects, 96% sensitivity and 96% specificity in SLAP lesions (86% accuracy in type I, 95% accuracy in type II), 100% sensitivity and 100% specificity in full thickness rotator cuff tears, and 82% sensitivity, and 100% specificity in depicting partial thickness rotator cuff tears. On arthroscopy, following diagnoses were made: 16 Bankart lesions, 14 Hills-Sachs defects, 25 SLAP lesions (7 type I, 18 type II), 17 rotator cuff lesions (6 full thickness and 11 partial thickness tears).

Direct MR arthrography depicted partial thickness rotator cuff tears and type I SLAP lesions better. CT arthrography was better in depicting bony Bankart lesions and Hills-Sachs defects. Both techniques were equally competent in demonstrating full thickness rotator cuff tears, Bankart lesions, and type II SLAP lesions.

Choi, J, Lee, I, Lee, J, Kwack, K, Kwon, J, Kang, H, Oh, J, et al, , 16 Slice Multidetector CT Arthrography in Evaluation of Labral and Rotator Cuff Lesions of the Shoulder: A Preliminary Study with Comparison of Findings with Direct MR Arthrography and Arthroscopic Findings.  Radiological Society of North America 2005 Scientific Assembly and Annual Meeting, November 27 - December 2, 2005 ,Chicago IL. http://archive.rsna.org/2005/4409892.html