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Journal of the Korean Academy of Rehabilitation Medicine 1999;23(3):660-663.
Cystic Entrapment of Infraspinatus Branch of Suprascapular Nerve Confirmed by Ultrasonography: Case report.
Kang, Kyong Ju , Lee, Sam Gyu , Jung, Ju Chan , Seon, Kwang Jin
Department of Rehabilitation Medicine, Chonnam National Univisity College of Medicine.
초음파로 진단된 낭종에 의한 상견갑신경의 극하근 분지 포착 ⁣증례 보고⁣
강경주, 이삼규, 정주찬, 선광진
전남대학교 의과대학 재활의학교실
Abstract

Cystic entrapment of infraspinatus branch of suprascapular nerve is a rare cause of shoulder pain with infraspinatus atrophy. We discuss the ultrasonographic diagnosis and ultrasonography- guided aspiration of the cyst as a treatment.

Case: A 37-year-old, ship-yard laborer had experienced left shoulder discomfort and pain without trauma history. Physical examination showed profound selective atrophy of left infraspinatus muscle. Simple X-ray of shoulder showed normal findings. Electrodiagnostic examination revealed delayed motor latency of infraspinatus branch of suprascapular nerve and denervation potentials of infraspinatus muscle exclusively. Ultrasonographic finding showed 13.5⁓21.5 mm sized cystic mass around left infraspinatus notch. Ultrasonography-guided aspiration was done, and then electrical stimulation therapy and strengthening exercise of left shoulder were performed. Symptoms were improved.

We report a rare case of cystic entrapment of infraspinatus branch of suprascapular nerve in a patient without traumatic insult.

Key Words: Infraspinatus branch of suprascapular nerve, Cystic entrapment, Ultrasonography


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