**9. Contraindications to arthroscopic instability repair**

Numerous pathologic conditions have been suggested as contraindications to arthroscopic shoulder instability repair, including capsular attenuation, humeral avulsion of the glenohumeral ligament (HAGL) lesions, failure of previous stabilization, and instability in a collision athlete. However, sizeable glenohumeral bone defects represent the most important contraindication to arthroscopic shoulder stabilization.
