Proximal Median Nerve Compression in the Differential Diagnosis of Carpal Tunnel Syndrome

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Löppönen, P.; Hulkkonen, S.; Ryhänen, J. Proximal Median Nerve Compression in the Differential Diagnosis of Carpal Tunnel Syndrome. J. Clin. Med. 2022, 11, 3988.

Title: Proximal Median Nerve Compression in the Differential Diagnosis of Carpal Tunnel Syndrome
Author: Löppönen, Pekka; Hulkkonen, Sina; Ryhänen, Jorma
Publisher: Multidisciplinary Digital Publishing Institute
Date: 2022-07-09
URI: http://hdl.handle.net/10138/346411
Abstract: Carpal tunnel syndrome (CTS) is the most common median nerve compression neuropathy. Its symptoms and clinical presentation are well known. However, symptoms at median nerve distribution can also be caused by a proximal problem. Pronator syndrome (PS) and anterior interosseous nerve syndrome (AINS) with their typical characteristics have been thought to explain proximal median nerve problems. Still, the literature on proximal median nerve compressions (PMNCs) is conflicting, making this classic split too simple. This review clarifies that PMNCs should be understood as a spectrum of mild to severe nerve lesions along a branching median nerve, thus causing variable symptoms. Clear objective findings are not always present, and therefore, diagnosis should be based on a more thorough understanding of anatomy and clinical testing. Treatment should be planned according to each patient’s individual situation. To emphasize the complexity of causes and symptoms, PMNC should be named proximal median nerve syndrome.


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