Clinical treatment of suprascapular nerve compression syndromes via posterior portal by arthroscopic decompression of spinoglenoid notch cysts and release of suprascapular nerve / 中华骨科杂志

ABSTRACT

Objective To investigate the clinical outcomes of arthroscopic decompression of spinoglenoid notch cysts and release of suprascapular nerve in treating suprascapular nerve compression syndromes via posterior portal.Methods Eleven patients from January 2010 to January 2017 with spinoglenoid notch cysts complicated suprascapular nerve compression syndromes were included.There were 7 males and 4 females with the average age of 41.5±5.3 years old (range 29-56 years) with 3 patients left side involved and 8 right side.All patients were diagnosed with MRI and EMG.The surgical procedure began with posterior capsule arthroscopic releasement from the labmm,then found the spinoglenoid notch cyst.Split of the cyst was made for internal drainage,then found the suprascapular nerve and vessel bundle for clearing the bursal tissue with probe,decompressed the suprascapular nerve finally.Mecobalamin was taken (0.5 mg,tid) until 3 months postoperatively.The patients were evaluated by functional scores from American Shoulder Elbow Surgeons (ASES) and Constant-Murley preoperatively and postoperatively.Statistical analysis was conducted by student t-test.Results All patients were followed up at 7-15 months (with an average of 10 months).The mean preoperative ASES score increased from 46.5±3.7 to 93.8±2.2 at the time of final follow-up with the significant difference (t=3.359,P＜0.05).Preoperative ASES score were good in 5 cases,fair in 4 cases and poor in 2 cases.The postoperative score were excellent in all patients.The Constant-Murley score was 47.3±4.2 preoperatively and 94.0±1.8 postoperatively with significant difference (t=4.776,P＜0.05).Preoperative score were good in 6 cases and fair in 5 cases.The postoperative score were excellent in all patients.These patients had no recurrence of cyst after surgery and returned to work.Conclusion Arthroscopic decompression of spinlglenoid notch cyst and suprascapular nerve release via posterior portal can successfully treat suprascapular nerve compression syndrome resulting in spinoglenoid notch cyst.