• Giulia Piccinini, Daniele Coraci, Eduardo Marcos Fernandez Marquez, Maria Chiara Vulpiani, and Luca Padua.
• Physical Medicine and Rehabilitation Unit, Sant'Andrea Hospital, "Sapienza" University of Rome, Rome, Italy; IRCCS Fondazione Don Carlo Gnocchi, Milan, Italy. Electronic address: giulia.piccinini@hotmail.com.
• World Neurosurg. 2018 Dec 1; 120: 112-116.

BackgroundThe purpose of this paper is to underline that the association of physical examination, electrophysiology, and ultrasound was crucial in identifying the correct disease and atypical characteristics of its presentation, in turn, providing proper information for both surgical treatment and a rehabilitation program. Fibular nerve compression is a common finding in the adult population, and it is more frequent at the fibular head. The clinical picture may be characterized by motor and/or sensory deficits. The same symptoms may sometimes be suggestive of root impairment.Case DescriptionWe report the case of a 39-year-old man who came to our laboratory with a diagnosis of multimetameric lumbosacral radiculopathy. The patient reported a history of ankle numbness and transient foot drop. Neurophysiologic examination showed peripheral axonal damage at tibialis anterior and lateral gastrocnemius muscles. A nerve ultrasound showed the presence of a conflict between a fibular exostosis and the fibular nerve. Furthermore, the fibular nerve presented an anatomic variation supplying the lateral gastrocnemius muscle.ConclusionsUltrasound was crucial in recognizing the cause of the atypical presentation and avoiding a misdiagnosis. Also, it allowed the identification of the appropriate treatment and rehabilitation, as well as preventing irreversible nerve damage. As a result, critical information was presented to the surgeon for surgical treatment.Copyright © 2018 Elsevier Inc. All rights reserved.

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