Rotator cuff fatty infiltration and muscle atrophy: relation to glenoid deformity in primary glenohumeral osteoarthritis

Teres Minor Muscle Atrophy

“…An association of teres minor atrophy and fat infiltration with glenoid retroversion and posterior humeral head subluxation in the setting of glenohumeral osteoarthritis has been described in a few studies [26][27][28] . Donohue et al 26 examined 190 shoulders in 175 patients with primary glenohumeral osteoarthritis and showed a 3.8°(p 5 0.03) increase in glenoid retroversion in patients with teres minor fat infiltrate compared with those who had none.…”

When should reverse total shoulder arthroplasty be considered in glenohumeral joint arthritis?

“…Puzzitiello et al [ 12 ] concluded that rotator cuff muscle quality as assessed by MA and FI does not impact clinical outcomes following RSA with a lateralized glenosphere in patients with GHOA and an intact rotator cuff. Therefore, if progressed MA and FI is combined with GHOA, RSA could be a reasonable decision even with an intact rotator cuff [ 2 , 10 , 12 , 13 ].…”

“…(1) Freedom from rotator cuff preservation: in TSA, the rotator cuff tendon should be preserved and repaired at the last stage of surgery. In addition, MA and FI are important [ 10 ]. However, in RSA, the tendons of supraspinatus and infraspinatus can be removed, and MA and FI are not critical to clinical outcomes [ 12 ].…”

“…Upon literature review, three factors have been mentioned commonly as related with poor clinical outcomes: rotator cuff dysfunction, glenoid bone deformity, and preoperative stiffness. These three factors independently can influence the outcome of TSA but sometimes coexist and can influence each other [ 9 , 10 ].…”

“…Stiff shoulders can be associated with significant rotator cuff muscle dysfunction, even in the absence of a full-thickness rotator cuff tear. Advanced age and long-standing stiffness have been linked to increased FI and MA [ 10 , 13 ].…”