Bilateral Suprascapular Nerve Entrapment by Ganglion Cyst Associated with Superior Labral Lesion
A 28-year-old housewife presented with one year history of pain and weakness in her left shoulder. 3 months of conservative management had previously failed. On clinical examination, the patient showed subspinosus hypotrophy and lack of strength in external rotation. Electromyography showed suprascapular nerve entrapment neuropathy signs: increased latency time of suprascapular nerve. Magnetic resonance imaging scans of the shoulder revealed a 4 x 2 cm well-defined mass just below the supraspinatus muscle. Superior labrum showed abnormal signal intensity suggesting a structural continuity with ganglion cyst (Fig. , ). The patient underwent arthroscopy of her left shoulder, which revealed a type II SLAP lesion. Dissection with a blunt probe as previously described and labral repair were performed (Fig. ). Two months after arthroscopic cyst decompression, an MRI showed that the cystic mass had dissolved (Fig. ) and electromyographic findings showed suprascapular reinnervation signs.