ガングリオンと外傷により発症した肩甲上神経麻痺手術例の検討

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We studied and compared the examinations of suprascapular nerve palsy in which we operated on whose symptoms were caused by a ganglion cyst and by trauma. The patients were 9 men we operated on them from 1996 to 2005. Their mean age was 37 years old. Their mean follow-up period was 25.4 months. 3 cases were caused by trauma, and 6 cases were caused by a ganglion cyst. The chief complaint was severe pain at rest for the trauma case, and dull pain on motion for the ganglion case. Weakness of external rotation was noted in all cases. Supraspinatus and infraspinatus muscle atrophy showed in all trauma cases. MRIs showed a ganglion cyst existed at the spinoglenoid notch in all ganglion cases. We recognized denervation in the electromyograms at the supra/infrasupinatus muscle for all trauma cases. We performed an arthroscopic decompression for the ganglion cases, and neurolysis of suprascapular nerve for the trauma cases. The suprascapular nerve was not ruptured and entrapped in the suprascapular notch. Previous pain had improved in all cases after the operation. In trauma cases, muscular atrophy remained in 2 cases. As a ganglion cyst existed at the spinoglenoid notch, we thought that their pain was weaker. In trauma cases, weakness of external rotation remained because the supraspinatus nerve was entrapped at the suprascapular notch and stretch for adduction at the trauma. A treatment policy was basically similar to a non-traumatic cases in a trauma cases, but we thought when severe pain remained, and conservative therapy did not succeed like this case, early operation should be done.
日本肩関節学会の論文

ガングリオンと外傷により発症した肩甲上神経麻痺手術例の検討

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