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Abstract
One hundred two type II SLAP lesions without associated anterior instability, Bankart lesion, or anterior inferior
labral pathology were surgically treated under arthroscopic control. There were three
distinct type II SLAP lesions based on anatomic location: anterior (37%), posterior (31%), and combined
anterior and posterior (31%). Preoperatively, the Speed and O'Brien tests were useful
in predicting anterior lesions, whereas the Jobe relocation test was useful in predicting
posterior lesions. Rotator cuff tears were present in 31% of patients and were found
to be lesion-location specific. In posterior and combined anterior-posterior lesions,
a drive-through sign was always present (despite absence of anterior-inferior labral
pathology or a Bankart lesion) and was eliminated by repair of the posterior component
of the SLAP lesion. We conclude that SLAP lesions with a posterior component develop posterior-superior instability that manifests
itself by a secondary anterior-inferior pseudolaxity (drive- through sign), and that
chronic superior instability leads to secondary lesion-location-specific rotator cuff
tears that begin as partial thickness tears from inside the joint.
Arthroscopy 1998 Sep;14(6):553-65
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© 1998 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved.
