Zusammenfassung

Background: Shoulder arthroscopy first described by Burman already in 1930, has evolved only in last 15 years to become a common accepted diagnostic and therapeutic procedure in treatment of different shoulder conditions. Parallely to the advances in arthroscopic operative techniques also our knowledge about arthroscopic shoulder anatomy expanded and many physiologic variants in anatomical structures have been identified in glenohumeral joint. It is very important to be familiar with those when performing shoulder arthroscopy, since in some cases they can easily be mistaken for pathologic lesions which can lead to unnecessary and potentially harmful operative procedures. Methods: We prospectively evaluated arthroscopic shoulder anatomy in 54 consecutive shoulder arthroscopies performed for different shoulder conditions in our practice. In all patients diagnostic arthroscopy was performed following the SCOI protocol described by Snyder. With regard to the anatomy variants described in literature and its importance in shoulder arthroscopy, special attention was focused on three regions of glenohumeral joint: long head of biceps tendon with its anchor and adjacent superior labrum, anterior joint capsule with glenohumeral ligaments and subscapularis tendon and on anterior labrum. The incidence of the observed anatomical variants was calculated. The most common combinations of anatomy variants were described and schematically presented. Results: The most significant anatomical variant observed in the region of long head of biceps tendon, biceps anchor and superior labrum was sublabral sulcus that was observed in 17% of shoulders. The region of anterior capsule with glenohumeral ligaments and subscapularis tendon showed greatest anatomical variability, especially the MGHL and the IGHL were very variably expressed and in some cases also absent. In the region of anterior labrum two significant anatomical variants were observed, one of them sublabral hole that was present in 21% of shoulders and the other absent ...