Contents
Tenosynovitis is the inflammation of the synovium surrounding tendons, typically leading to joint pain, swelling, and stiffness.

Clinical features
Four cardinal signs:
- Uniform, symmetric digit swelling
- Digit is held in partial flexion at rest
- Excessive tenderness along the entire course of the flexor tendon sheath
- Pain along the tendon sheath with passive digit extension (M/clinically reproducible)

Complications
- Tendon necrosis
- Adhesion formation
- Spread of infection to the deep fascial spaces