Inter- and intraobserver variability of MR arthrography in the detection and classification of superior labral anterior posterior (SLAP) lesions: evaluation in 78 cases with arthroscopic correlation

Abstract

MR arthrography allows reliable and accurate detection of SLAP lesions. In addition, SLAP lesions can be diagnosed and classified with substantial to excellent inter- and intraobserver agreement.

Superior Labral Anteroposterior Tears: Accuracy and Interobserver Reliability of Multidetector CT Arthrography for Diagnosis

“…The results of our study were concordant with the high diagnostic performance of multidetector CT arthrography reported in prior studies ( 9,19 ). In terms of interobserver agreement, detection of SLAP lesions at multidetector CT arthrography showed excellent agreement, similar to MR arthrography ( 18 ). In our study, the percentage of the correct classifi cation of SLAP lesions for both readers was similar to that of MR arthrography ( 15,17,18 ).…”

“…In terms of interobserver agreement, detection of SLAP lesions at multidetector CT arthrography showed excellent agreement, similar to MR arthrography ( 18 ). In our study, the percentage of the correct classifi cation of SLAP lesions for both readers was similar to that of MR arthrography ( 15,17,18 ). In terms of interobserver agreement, classifi cation of SLAP lesions at multidetector CT arthrography showed good agreement ( 18 ).…”

“…In our study, the previously reported signs of a SLAP type II lesion, such as lateral curved and globular or irregular-shaped sublabral contrast material deposits on an oblique coronal image, widening of the space in the region of the sublabral contrast material deposit on an oblique coronal image, and anteroposterior extension of the sublabral contrast material deposit on an axial image showed higher frequency in SLAP type II lesions than in sublabral recesses, with a signifi cant difference ( P , .05). This result is different from that in a study by Jee et al ( 16 ) but is consistent with results in other studies (16)(17)(18). Although it showed signifi cant differences, a sublabral recess in our study more SLAP lesion, with or without contiguity with the labral tear.…”

“…For detection of SLAP lesions, the sensitivity, specifi city, and accuracy of MR arthrography were 89%, 91%, and 90% in a study by Bencardino et al ( 15 ); 84%-92%, 69%-84%, and 74%-84% in a study by Jee et al ( 16 ); 82%, 98%, and 95% in a study by Waldt et al ( 17 ); and 86.4%-90.9%, 76.7%-93.3%, and 82.4%-90.5% in a study by Holzapfel et al ( 18 ), respectively. Compared with the results in these studies, multidetector CT arthrography in our study showed higher sensitivity (94.3% and 97.7% for readers 1 and 2, respectively) but slightly lower specifi city (72.6% and type V and VII lesions failed to be differentiated from SLAP type V lesions even in fi nal review with knowledge of arthroscopic results.…”

Extra-articular contrast material leaks into locations unrelated to the injection path in shoulder MR arthrography

“…In another study also assessing the determining interobserver and intraobserver variability of MR arthrography in the detection and classification of SLAP lesions, Holzapfel et al [24] found that MR arthrography allowed reliable and accurate detection of SLAP lesions. In addition, they proved that SLAP lesions could be diagnosed and classified with substantial to excellent interobserver and intraobserver agreement.…”