Carpal tunnel syndrome.

CTS is a common upper extremity problem that has an increasing incidence and poorly understood causes. Radiographs and electrodiagnostic tests are helpful, but the diagnosis remains based on clinical symptoms and signs. The several sites of median nerve compression must be considered. Splinting and steroid injections are often effective. Carpal tunnel release is indicated in refractory or acute problems, and both open and endoscopic methods remain popular. Each has specific advantages.