What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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Findings A lobulated, fluid signal intensity mass pedunculates from the inferior aspect of the glenoid labrum into the quadrilateral or quadrangular space yielding mass effect upon the axillary nerve and mild edema pattern of the teres minor.
What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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What’s the Diagnosis – Case 55
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Diagnosis: Degneration and tears of the glenoid and acetabular labrum may yield paralabral ganglion cysts. If the tear itself is not clearly delineated on imaging, it is presumed to be present. As in this case, the cysts can extend into spaces where neurovascular bundles are present and cause mass effect upon the neurovasular bundles. More commonly, tears of the superior or posterior glenoid labrum yield ganglion extending into the suprascapular notch or spinoglenoid notch. Extension into the quadrilateral space is less common and places the traversing axillary nerve at risk.
What’s the Diagnosis – Case 55
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Compromise of the nerve affects the innervated musculaure and yields neurogenic edema and in a more long standing process can cause fatty atrophy of the musculature. As in this case, not all the musculature innervated has to be affected. The deltoid musculature in this case was normal. Treatment may entail ultrasound guided aspiration to help resolve the impingement of the nerve. If unsuccessful in mitigating symptoms, surgery is required to asses the underlying pathology, the labral tear.
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