the flexor retinaculum. In CTS, a group of symptoms occur together, and it is therefore called a syndrome. The five stages of severity of Carpal Tunnel Syndrome revolve around paraesthesia ...

Ultrasound images depicting hydrodissection procedure in a patient with carpal tunnel syndrome ... fluid dissecting the nerve away from the flexor retinaculum (yellow star).

Common conditions that cause thumb pain include arthritis, tendonitis, trigger thumb, carpal tunnel syndrome ... other fingers. Each flexor tendon travels through a tunnel called a tendon sheath.