High-resolution ultrasound in ulnar neuropathy at the elbow: A prospective study.

Introduction: We examined the role of ultrasound in diagnosing and localizing ulnar neuropathy (UN) at the elbow.

Methods: Forty-one patients referred for UN and 43 healthy subjects were included. Cross-sectional area (CSA) of the ulnar nerve was measured by ultrasound at 5 locations across the elbow and at the wrist.