• Semra Aktürk, Raikan Büyükavcı, and Yüksel Ersoy.
• Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Inonu Universitym, Malatya, Turkey. semrakayakturk@hotmail.com.
• Acta Neurol Belg. 2020 Feb 1; 120 (1): 43-47.

IntroductionTo evaluate the ultrasound findings of the median nerve in patients with clinical assigned carpal tunnel syndrome but normal nerve conduction studies.MethodsThis prospective, cross-sectional study involved 41 patients (51 hands) with clinically assigned CTS and normal nerve conduction studies and 20 healthy controls (30 hands). Ultrasonography was performed in all participants, and cross-sectional area (CSA), hypoechogenicity, and mobility of the median nerve were evaluated. All patients were assessed with Boston Carpal Tunnel Questionnaire (BCTQ).ResultsCSA of the median nerve in the wrist was significantly higher in the patient group when compared to the control group. Echogenicity and mobility were significantly decreased in the patient group. Ultrasound abnormalities were positively correlated with clinical features. A significant correlation was observed among sensory loss, provocative tests, body mass index, BCTQ, and high CSA.ConclusionUS can help the clinicians with the diagnosis of carpal tunnel syndrome in patients with clinical symptoms but negative nerve conduction study results.

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