spinoglenoid notch ganglion cyst
Spinoglenoid notch ganglion cysts (SGNCs) are a location-specific form of ganglion cysts that arise in the region of the spinoglenoid notch.
Epidemiology
They are generally rare and may be slightly commoner in males .
Associations
- labral tears of the shoulder: especially SLAP lesions.
Clinical presentation
They may result in compression of the suprascapular nerve at the spinoglenoid notch. Other described features include infraspinatus atrophy, weakness with external rotation and posterior shoulder tenderness.
Radiographic features
MRI
Typically seen as a variably sized cystic lesion at the size of the spinoglenoid notch. Signal characteristics are similar to other ganglion cysts and include:
- T1: low signal
- T2: high signal
MRI may also show associated infraspinatus atrophy.
Treatment and prognosis
Treatment options range from conservative management to aspiration of the cysts and excision. Most cysts are thought to resolve with treatment .
Differential diagnosis
Imaging differential considerations include:
- shoulder paralabral cyst extending into the spinoglenoid notch region
- spinoglenoid notch varix
See also
Siehe auch:
- Incisura scapulae
- Incisura-Scapulae-Syndrom
- Incisura spinoglenoidalis
- suprascapular neuropathy due to a spinoglenoid notch ganglion
- spinoglenoid notch varix