Updates on Common Mononeuropathies.

This article provides an overview of the most common mononeuropathies. It includes a description of the neuroanatomy and function of each nerve which allows clinical localization of the lesion. It also describes the clinical presentation, findings in electrodiagnostic studies, updates in imaging including neuromuscular ultrasound and magnetic resonance neurography, and recommended treatment. While mononeuropathies may be part of polyneuropathy, this scenario is beyond the scope of this article. The most common mononeuropathy is carpal tunnel syndrome. Its prevalence in the United States is estimated at 50 per 1,000. The second most common entrapment neuropathy is ulnar neuropathy at the elbow. The incidence was calculated as 20.9% in a 2005 study. The most common compressive neuropathy of the lower extremity is peroneal neuropathy. Other common mononeuropathies included in this article are radial neuropathy, tibial neuropathy, and femoral neuropathy.