Eun Hae Park, Abstract Co-Author: Nothing to Disclose

Seok Hahn MD, Presenter: Nothing to Disclose

Young Han Lee MD, Abstract Co-Author: Nothing to Disclose

Sungjun Kim MD, Abstract Co-Author: Nothing to Disclose

Ho-Taek Song MD, Abstract Co-Author: Nothing to Disclose

Jin-Suck Suh MD, Abstract Co-Author: Nothing to Disclose

To evaluate the accuracy of MR arthrography(MRA) at diagnosis of Partial Articular-sided Supraspinatus Tendon Avulsion(PASTA) lesion in arthroscopically confirmed patients and to retrospectively compare the MRI characteristics of surgically treated patients and conservatively treated patients.

Institutional review board approval was obtained. In the first session, MRA of 251 patients who underwent arthroscopic repair of supraspinatus tendon from 2011 to 2013 were reviewed and diagnostic accuracy (sensitivity, specificity, positive and negative predictive value) of MRA in PASTA lesion were calculated. In the second session, the MRA of two groups (group 1 = 239 patients who were treated with conservative care, group 2 = 53 patients who underwent arthroscopy) were retrospectively reviewed to assess the following features: vertical grade, transverse location, acromion type, coexisting other rotator cuff tendon tear, biceps tendinopathy, calcific tendinopathy, SLAP lesion, bursitis, Bankart lesion, and osteoarthritis. Student T-test and multivariate logistic regression models were used to determine whether there is difference of MRI characteristics in two groups.

In the first session, the sensitivity and specificity of MRA in diagnosis of PASTA were 77.3% and 88.4%. In the second session, vertical grade of PASTA and coexisting other rotator cuff full thickness tear was the most significant characteristic of two groups. In group 1, 25 of 53(47.1%) patients were grade 3 whereas 49 of 239 (20.5%) patients were grade 3 in group 2. In group 1, 35 of 53 (66.0%) patients had Coexisiting additional rotator cuff tendon tear was present at 35 of 53 (66.0%) in group 1, and 76 out of 239 (31.7%) in group 2, respectively. For PASTAs not combined with other rotator cuff tear, MRI features significantly associated with surgical group included a vertical grade 3 (p = p < 0.001), combined with Bankart lesion (p = 0.01).

MRA is accurate in diagnosis of PASTA. When vertical grade 3 and coexisting additional rotator cuff tendon tear is noted in MRA, surgical treatment is likely to be performed so radiologist should pay attention in such findings

MR arthrography (MRA) is known to be more accurate imaging methods than conventional MRI in assessment of rotator cuff tears

Park, E, Hahn, S, Lee, Y, Kim, S, Song, H, Suh, J, MR Arthrography Characteristics of Partial Articular-sided Supraspinatus Tendon Avulsion (PASTA) Lesion Repaired with Arthroscopy: Comparison with Conservatively Treated Patients.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14016622.html