UMEM Educational Pearls

Category: Orthopedics

Title: Carpal Tunnel Syndrome

Keywords: Carpal Tunnel Syndrome, neuropathy (PubMed Search)

Posted: 10/10/2020 by Brian Corwell, MD (Updated: 8/17/2022)
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Carpal Tunnel Syndrome (CTS)

 

The hallmark of classic CTS:  pain or paresthesia (numbness and tingling) in a distribution that includes the median nerve territory, with involvement of the first three digits and the radial half of the fourth digit.

The symptoms of CTS are typically worse at night and often awaken patients from sleep.

Fixed sensory loss is usually a late finding

Involves the median-innervated fingers BUT spares the thenar eminence.

This pattern occurs because the palmar sensory cutaneous nerve arises proximal to the wrist and passes over, rather than through, the carpal tunnel.

Consider a more proximal lesion in cases involving sensory loss in the thenar eminence

            Example: pronator syndrome