spinoglenoidale Zyste

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

• suprascapular neuropathy

Siehe auch:

• Incisura scapulae
• Incisura-Scapulae-Syndrom
• Incisura spinoglenoidalis
• suprascapular neuropathy due to a spinoglenoid notch ganglion
• spinoglenoid notch varix

und weiter:

• subakromiales Impingement
• spinoglenoidal varicosity