Images in Neurology |

Suprascapular Nerve Entrapment in a Canoeist

Frauke Knossalla, MD; Volkmar Nicolas, MD; Martin Tegenthoff, MD
Arch Neurol. 2006;63(5):781. doi:10.1001/archneur.63.5.781.
Text Size: A A A
Published online


A 15-year-old girl described pain, reduced abduction, and external rotation of the left shoulder as well as intermittent paresthesia over the left scapula. She recalled no trauma, and the symptoms were exacerbated by exercise and abated with rest. On physical examination of the patient, we found a moderate lesion of the suprascapular nerve and moderate atrophy of the left infraspinatus muscle. Electromyographic examination revealed signs of a lesion that caused the neuropraxic state of the left suprascapular nerve, moderate axonal loss, and denervation of the left infraspinatus muscle. T2-weighted magnetic resonance imaging provided anatomical demonstration of nerve entrapment caused by a well-distinguished round structure next to the left incisura scapularis (Figure).1 After surgical decompression and extirpation of the structure, histological analysis identified it as a ganglion cyst. Surgical decompression gave complete pain relief and full recovery of the shoulder function. It is known that sports involving overhead motions, such as tennis, weight lifting, and volleyball, may result in traction injury to the suprascapular nerve.2,3

Figures in this Article

Sign In to Access Full Content

Don't have Access?

Register and get free email Table of Contents alerts, saved searches, PowerPoint downloads, CME quizzes, and more

Subscribe for full-text access to content from 1998 forward and a host of useful features

Activate your current subscription (AMA members and current subscribers)

Purchase Online Access to this article for 24 hours

First Page Preview

View Large
First page PDF preview


Place holder to copy figure label and caption

T2-weighted axial magnetic resonance image of the left shoulder before the surgical procedure, demonstrating a structure (1) of abnormally high signal intensity between the glenoid and the infraspinatus that is recognized as a ganglion cyst. 1 indicates ganglion cyst; 2, glenoid; 3, infraspinatus; 4, caput humeri; and 5, deltoideus.

Graphic Jump Location




Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).
Submit a Comment


Some tools below are only available to our subscribers or users with an online account.

Sign In to Access Full Content

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Topics
PubMed Articles