Presentation
Right shoulder pain.
Patient Data
Age: 35 years
Gender: Male
From the case:
Shoulder paralabral cyst
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The MRI study shows the following:
- a large well-circumscribed lobulated fluid intensity T1 hypointense/T2 hyperintense posterior paralabral cystic lesion shows thin internal septations, measuring 2x3x6 cm along ap, tr, and cc dimensions respectively, seen extending to the spinoglenoid and supra scapular notches
- the cyst is seen extending to the substance of the posterior glenoid labrum via a thin T2 hyperintense line suggesting an associated labral tear
- posterior glenoid bony rim subchondral small cyst
- normal MRI signal of the rotator cuff muscles with no signs of suprascapular neuropathy
- Incidental humeral head small cyst
Case Discussion
This case shows a posterior paralabral cyst extending to the spinoglenoid and suprascapular notches with no associated signs of suprascapular nerve entrapment.
The cyst is suggested to be connecting to a focal posterior labral tear/detachment suspected to be the source of this cyst. The secondary involvement of the spinoglenoid notch by a paralabral cyst differs from the primary spinoglenoid notch cyst which is a ganglion cyst.
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