Case Summary: Herein is reported a case of a 21-year-old ice hockey pl
ayer with a suprascapular ganglion causing atrophy of the infraspinatu
s muscle. Discussion: Lesions of the suprascapular nerve can be caused
by trauma or compression. While the suprascapular nerve entrapment sy
ndrome results in atrophy of both the supraspinatus and the infraspina
tus muscles, compression of the nerve distal to the spinoglenoid notch
leads to isolated weakness of the infraspinatus muscle.