Indirect Arthroscopic Decompression of Spinoglenoid Cyst with Suprascapular Neuropathy: Report of Two Cases and Literature Review

Suprascapular nerve compression is rare and should be considered in the differential diagnosis of patients with shoulder pain and external rotation deficit. Spinoglenoidal cysts may cause compression, and posterosuperior glenoid labrum lesions are the most likely hypothesis to explain their appearance. Magnetic resonance imaging and electromyography define the diagnosis. Indirect arthroscopic decompression of the cyst and repair of the glenoid labrum enable complete neurological recovery. The authors report two cases of isolated paralysis of the infraspinatus muscle caused by compression due to spinoglenoidal cysts that were treated by means of arthroscopy, and present the pre and postoperative assessments.