Unusual Case of Peroneal Nerve Palsy Due to Compression of an Extraneural Intramuscular Synovial Cyst: A Case Report
Daniel Schrednitzki, Stephanie Schneider, Jonas Sina, Stefan Kroppenstedt, Andreas M Halder · 2026
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Description
Daniel Schrednitzki and colleagues report a 2026 case of peroneal nerve palsy from compression by an intramuscular synovial cyst. This nerve disorder is the most common lower limb nerve disorder, usually caused by external squeezing over the leg bone head where soft tissue protection is poor. Internal squeezing by cysts is unusual. Here a deep leg nerve was squeezed by an extraneural muscle cyst with acute symptoms.
A 45-year-old man developed sudden foot drop after knee distortion. Nerve studies showed severe axonal injury, and MRI revealed a multilobular cystic mass about 7.8 by 2 by 2.3 centimetres inside the peroneus longus muscle, arising from the tibioperoneal joint. Surgery removed the mucinous cyst completely including its stalk, and tissue examination confirmed a ganglion cyst without malignancy. Sensation and motor function recovered progressively within five days after surgery.
Catalog record
| CREATOR | Daniel Schrednitzki, Stephanie Schneider, Jonas Sina, Stefan Kroppenstedt, Andreas M Halder |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 17 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |