TIBIAL MONONEUROPATHY FROM A LOWER-LIMB SYNOVIAL CYST

Background: Tibial mononeuropathy due to compression by a synovial cys t is uncommon with fewer than 10 cases reported in the literature. Met hod: Case Study. Results: Tibial motor mononeuropathy with focal condu ction block between the popliteal fossa and ankle was identified by el ectrophysiological testing. Magnetic resonance imaging and surgical ex ploration identified a synovial cyst compressing the nerve just distal to the popliteal fossa, Conclusions: The combination of electrophysio logical localization and imaging in cases of unexplained tibial monone uropathy may identify an unexpected structural cause.