Stenosing tenosynovitis of radial styloid process

Tenosynovitis is a chronic aseptic inflammatory change in the tendon sheath caused by mechanical friction. Tenosynovitis is a common disease in orthopedics, which is more common in manual laborers, especially people who repeatedly stretch, flex, pinch, and grip with their fingers are susceptible to this disease. Generally more women than men. A tendon sheath is a kind of auxiliary device for tendons. It is a double-layered sleeve-like structure surrounding the tendon that is formed by the connective tissue surrounding the tendon to adapt to the sliding of the tendon. It is more common in the long, active parts of the wrist, ankle, fingers, toes . The tendon sheath is divided into two layers, and the outer side is a fibrous tendon sheath, which is thickened by the transverse and oblique fibers of the deep fascia. It attaches to the bone and joint capsule, and plays a role of restraining, supporting, sliding and increasing the tensile force on the tendon. The inner layer is a synovial tendon sheath, which is located inside the fibrous tendon sheath. The synovial sheath is divided into two layers, the dirty layer and the wall. The wall layer is lined with the inner surface of the fibrous tendon sheath. The part that forms a fold on the bone surface is called the mesentery. The layer surrounding the tendon surface is the dirty layer. Dirty and parietal synovial membranes are closed at both ends as blind cavities, which contain a small amount of synovial fluid, which functions to lubricate and maintain the mobility of tendons.