Tibial Mononeuropathy from a Lower Limb Synovial Cyst

     JCL Sun, C Wallace and DW Zochodne

Abstract:   Background: Tibial mononeuropathy due to compression by a synovial cyst is uncommon with fewer than 10 cases reported in the literature. Method: Case Study. Results: Tibial motor mononeuropathy with focal conduction block between the popliteal fossa and ankle was identified by electrophysiological testing. Magnetic resonance imaging and surgical exploration identified a synovial cyst compressing the nerve just distal to the popliteal fossa. Conclusions: The combination of electrophysiological localization and imaging in cases of unexplained tibial mononeuropathy may identify an unexpected structural cause.

Can. J. Neurol. Sci. 1995; 22: 312-315