Arthroscopic decompression of paralabral cyst around suprascapular notch causing suprascapular neuropathy

Compression neuropathy as a cause for painful shoulder

“…Patients with suprascapular neuropathy or nerve compression can experience pain or weakness in the shoulder and arm, which may mimic rotator cuff pathology . Ultrasound can demonstrate muscular atrophy and elucidate the potential presence of a ganglion cyst, which can cause compression on the nerve . Although ultrasound may or may not show nerve change or apparent nerve compression, it still serves as an important marker to trigger further investigation.…”

“…Entrapment of the suprascapular nerve can have a wide range of aetiologies including ligamentous hypertrophy, excessive traction on the suprascapular, scapular fractures, anatomical variations and morphology of the notch. Among the many reported cases of suprascapular nerve entrapment, the most common is ganglion (para‐labral) cyst compression leading to suprascapular nerve palsy …”

“…This finding is supported by a study constructed by Chiou et al indicating symptom relief in 86% of patients post ganglion cyst aspiration and repetitive disruption of the cystic wall. The suprascapular nerve is susceptible to entrapment at the level of SSN and SGN but more commonly in the SSN . If the trapped nerve occurs in the SSN, both the supraspinatus and infraspinatus muscles are usually denervated; however, when compression occurs at the level of SGN, then the infraspinatus muscles alone is typically involved .…”

A review of upper extremity peripheral nerve injuries in throwing athletes

“…27 Labral tears leading to paralabral cysts can also be problematic as they can cause compression of the suprascapular nerve at the spinoglenoid notch. 28 Similarly, an anatomical variant such as an anconeus epitrochlearis has been reported as a space-occupying lesion leading to compression of the ulnar nerve at the cubital tunnel. 29 The use of ultrasound can provide diagnostic value when evaluating potential PN abnormalities.…”

“…Suprascapular neuropathies present in throwing athletes may be a consequence of traction injury to the nerve 27 . Labral tears leading to paralabral cysts can also be problematic as they can cause compression of the suprascapular nerve at the spinoglenoid notch 28 . Similarly, an anatomical variant such as an anconeus epitrochlearis has been reported as a space‐occupying lesion leading to compression of the ulnar nerve at the cubital tunnel 29 …”