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Suprascapular Nerve Entrapment Caused by Protrusion of an Intraosseous Ganglion
of the Glenoid into the Spinoglenoid Notch: A Rare Cause of Posterior Shoulder
Pain
#MMPMID28620557
Ishimaru D
; Nagano A
; Terabayashi N
; Nishimoto Y
; Akiyama H
Case Rep Orthop
2017[]; 2017
(?): 1704697
PMID28620557
show ga
We describe a case of suprascapular nerve entrapment caused by protrusion of an
intraosseous ganglion of the glenoid into the spinoglenoid notch. A 47-year-old
man with left shoulder pain developed an intraosseous cyst in the left glenoid,
which came into contact with the suprascapular nerve. The area at which the
patient experienced spontaneous shoulder pain was innervated by the suprascapular
nerve, and 1% xylocaine injection into the spinoglenoid notch under
ultrasonographic guidance relieved the pain. Therefore, we concluded that the
protrusion of an intraosseous cyst of the glenoid into the spinoglenoid notch was
a cause of the pain, and performed curettage. Consequently, the shoulder pain was
resolved promptly without suprascapular nerve complications, and the cyst was
histologically diagnosed as an intraosseous ganglion. This case demonstrated that
the intraosseous ganglion of the glenoid was a benign lesion but could be a cause
of suprascapular nerve entrapment syndrome. Curettage is a useful treatment
option for a ganglion inside bone and very close to the suprascapular nerve.
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