Intraneural ganglion cysts are rare, benign, mucinous lesions that occur within neural sheaths and are thought to involve cystic fluid exiting from nearby synovial joints. They often present as tender masses causing paresthesias in the distribution of the involved nerve, muscle weakness or cramping, or localized or referred pain.
We present a case of a patient who initially presented with foot drop due to an intraneural ganglion cyst of the common peroneal nerve. This cyst was successfully treated using ultrasound guidance to aspirate the cyst and inject corticosteroid to prevent further inflammation.
Standard of care has previously involved surgical resection, but this has been associated with a high frequency of recurrence. Due to the risks of nerve and vessel damage, there have been efforts to find alternative ways of resolving these cysts.
Purposes and Clinical Relevance
Aspiration and injection of corticosteroid is a useful and minimally invasive alternative to surgery for managing intraneural ganglion cysts.
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Conflict of interest:
Teresa Liang, BSc; Anukul Panu, MD; Sean Crowther, MB BCh; Robert Lambert, MB BCh; and Gavin Low, MBChB, have declared that they have no conflict of interest.
All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2008 (5).
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Work was performed at the Department of Radiology and Diagnostic Imaging, University of Alberta Hospital, Walter Mackenzie Center, 8440-112 St, Edmonton, AB T6G 2B7 Canada.
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Liang, T., Panu, A., Crowther, S. et al. Ultrasound-Guided Aspiration and Injection of an Intraneural Ganglion Cyst of the Common Peroneal Nerve. HSS Jrnl 9, 270–274 (2013). https://doi.org/10.1007/s11420-013-9345-9
- intraneural ganglion cyst
- common peroneal nerve
- ultrasound-guided aspiration
- denervation edema
- foot drop