[Synovial cyst of the supracapsular notch of the shoulder with supracapsular nerve compression in a sportsman. Apropos of a case. Review of the literature].

Purpose Of The Study: Compression of the supra scapular nerve by a ganglion is rare. The authors report a case evoking rotator cuff tendinitis.

Materials And Methods: A 28 year old right handed handball player was seen for increasing pain and weakness in the right shoulder. He was treated in a first time for a rotator cuff tendinitis. In a second time a new clinical examination revealed an amyotrophy of the supraspinatus fossa. Electromyographic studies showed a denervation of the infra and supraspinatus muscle. An MRI was performed and showed a ganglion cyst at the suprascapular notch.

Results: An excision by posterior approach was performed and led to an uneventful recovery of the patient.

Discussion And Conclusion: This case reveals that an entrapment neuropathy of the suprascapular nerve can take the appearance of an ordinary rotator cuff tendinitis.